WMSD - Worldwide mollusc species DB Bagni Liggia

Family list - alphabetic order - names only
DB counters: Family=1941, Genus=19266, Subgenus=2953, Species=141409, Variety=83784
( 59363 Species and 6134 Variety have images)
DB also includes synonym/omonym: 348 for Family, 9794 for Genus/Subgenus and 72398 for Species/Variety


  • ABYSSOCHITONIDAE  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]-LEPIDOPLEURIDA [Order]-LEPIDOPLEURINA [Suborder]  (Sea)  - 8 Sp, 1 Var, 2 Img
  • ABYSSOCHRYSIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-ABYSSOCHRYSOIDEA [Superfamily]  (Sea)  - 12 Sp, 0 Var, 8 Img
  • ACANTHOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ACANTHOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 263 Sp, 16 Var, 82 Img
  • ACANTHOCHITONIDAE  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]-CHITONIDA [Order]-ACANTHOCHITONINA [Suborder]-CRYPTOPLACOIDEA [Superfamily]  (Sea)  - 169 Sp, 3 Var, 65 Img
  • ACANTHOCLYMENIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-BELOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 14 Sp, 0 Var, 2 Img
  • ACANTHOMENIIDAE  SOLENOGASTRES Taxon Tree: SOLENOGASTRES [Subclass]-CAVIBELONIA [Order]  (Sea)  - 5 Sp, 0 Var, 1 Img
  • ACANTHONEMATIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • ACAROCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ELLESMEROCERIDA [Order]  (Sea)  (FOSSIL)  - 16 Sp, 0 Var, 16 Img
  • ACAVIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ACAVOIDEA [Superfamily]  (Land)  - 111 Sp, 20 Var, 109 Img
  • ACHATINELLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ACHATINELLOIDEA [Superfamily]  (Land)  - 338 Sp, 241 Var, 208 Img
  • ACHATINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ACHATINOIDEA [Superfamily]  (Land)  - 254 Sp, 66 Var, 241 Img
  • ACICULIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-ARCHITAENIOGLOSSA [Order]-CYCLOPHOROIDEA [Superfamily]  (Land)  - 89 Sp, 7 Var, 54 Img
  • ACLEISTOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ONCOCERIDA [Order]  (Sea)  (FOSSIL)  - 20 Sp, 0 Var, 5 Img
  • ACLIDIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-VANIKOROIDEA [Superfamily]  (Sea)  - 88 Sp, 0 Var, 32 Img
  • ACMAEIDAE  GASTROPODA Taxon Tree: PATELLOGASTROPODA [Subclass]-LOTTIOIDEA [Superfamily]  (Sea)  - 59 Sp, 1 Var, 27 Img
  • ACOCHLIDIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-ACOCHLIDIACEA [Order]-ACOCHLIDIOIDEA [Superfamily]  (Freshwater)  - 7 Sp, 0 Var, 2 Img
  • ACRIOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ANCYLOCERATINA [Suborder]-ANCYLOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 16 Sp, 0 Var, 2 Img
  • ACROCANITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-PRIONOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 2 Img
  • ACROCHORDICERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-CERATITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 24 Sp, 0 Var, 0 Img
  • ACROLOXIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-HYGROPHILA [Order]-ACROLOXOIDEA [Superfamily]  (Freshwater)  - 57 Sp, 0 Var, 7 Img
  • ACROREIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-SIPHONARIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • ACTEOCINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-CEPHALASPIDEA [Order]-BULLOIDEA [Superfamily]  (Sea)  - 116 Sp, 4 Var, 47 Img
  • ACTEONELLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-ACTEONOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 36 Sp, 0 Var, 4 Img
  • ACTEONIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-ACTEONOIDEA [Superfamily]  (Sea)  - 258 Sp, 7 Var, 143 Img
  • ACTEONINIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-ACTEONINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 54 Sp, 1 Var, 20 Img
  • ACTINOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ACTINOCERIDA [Order]  (Sea)  (FOSSIL)  - 33 Sp, 0 Var, 12 Img
  • ACTINOCERIDA (unassigned)  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ACTINOCERIDA [Order]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • ACTINOCYCLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-DORIDOIDEA [Superfamily]  (Sea)  - 21 Sp, 0 Var, 13 Img
  • ACTINODONTIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-ACTINODONTIDA [Order]-ANODONTOPSOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 3 Img
  • ACTINODONTOPHORIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-UNIONIDA [Order]-UNIONOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • ACTINOSEPIIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-SEPIIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • ACUTICHITONIDAE  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 0 Img
  • ADDISONIIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-LEPETELLOIDEA [Superfamily]  (Sea)  - 3 Sp, 0 Var, 2 Img
  • ADRIANITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-ADRIANITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 80 Sp, 0 Var, 3 Img
  • ADYGEITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-TROPITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • ADYGEYIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-SPIRULIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • AEGIRIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-POLYCEROIDEA [Superfamily]  (Sea)  - 31 Sp, 1 Var, 21 Img
  • AEGOCRIOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ANCYLOCERATINA [Suborder]-PROTANCYLOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 29 Sp, 0 Var, 7 Img
  • AENIGMOCONCHIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-CARDITIDA [Order]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • AEOLIDIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-AEOLIDIOIDEA [Superfamily]  (Sea)  - 131 Sp, 0 Var, 45 Img
  • AFGHANODESMATIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-AFGHANODESMATIDA [Order]-AFGHANODESMATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • AGATHICERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-AGATHICERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 31 Sp, 2 Var, 3 Img
  • AGLAJIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-CEPHALASPIDEA [Order]-PHILINOIDEA [Superfamily]  (Sea)  - 93 Sp, 2 Var, 58 Img
  • AGONIATITIDA (unassigned)  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • AGONIATITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-AGONIATITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 41 Sp, 0 Var, 13 Img
  • AGRIOLIMACIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-LIMACOIDEA [Superfamily]  (Land)  - 138 Sp, 2 Var, 27 Img
  • AILLYIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-AILLYOIDEA [Superfamily]  (Land)  - 1 Sp, 0 Var, 1 Img
  • AIPOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-AIPOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • AITENGIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-ACOCHLIDIACEA [Order]-PARHEDYLOIDEA [Superfamily]  (Freshwater)  - 3 Sp, 0 Var, 2 Img
  • AKERIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-ANASPIDEA [Order]-AKEROIDEA [Superfamily]  (Sea)  - 12 Sp, 0 Var, 4 Img
  • AKIODORIDIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-ONCHIDORIDOIDEA [Superfamily]  (Sea)  - 9 Sp, 0 Var, 2 Img
  • AKTUBONAUTILIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 2 Img
  • ALACUPPIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-CEPHALASPIDEA [Order]-PHILINOIDEA [Superfamily]  (Sea)  - 1 Sp, 0 Var, 0 Img
  • ALASTEGIIDAE  POLYPLACOPHORA Taxon Tree: PALEOLORICATA [Subclass]-SEPTEMCHITONIDA [Order]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 2 Img
  • ALATOCONCHIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-MYALINIDA [Order]-ALATOCONCHOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • ALBANITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-MEEKOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • ALDANELLIDAE  HELCIONELLOIDA Taxon Tree: ARCHAEOBRANCHIA [Subclass]-PELAGIELLIFORMES [Order]-PELAGIELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 13 Sp, 0 Var, 3 Img
  • ALLATHECIDAE  HYOLITHA Taxon Tree: ORTHOTHECIDA [Order]  (Sea)  (FOSSIL)  - 28 Sp, 0 Var, 0 Img
  • ALLODESMATIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MODIOMORPHIDA [Order]-CYCLOCONCHACEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • ALLOPOSIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-OCTOPODA [Order]-INCIRRATA [Suborder]-ARGONAUTOIDEA [Superfamily]  (Sea)  - 2 Sp, 0 Var, 1 Img
  • ALLOTRIOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ENDOCERIDA [Order]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 0 Img
  • ALTAICORNIDAE  HYOLITHA Taxon Tree: HYOLITHIDA [Order]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • AMALTHEIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-EODEROCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 30 Sp, 3 Var, 28 Img
  • AMASTRIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-COCHLICOPOIDEA [Superfamily]  (Land)  - 325 Sp, 125 Var, 50 Img
  • AMATHINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PYRAMIDELLOIDEA [Superfamily]  (Sea)  - 60 Sp, 2 Var, 34 Img
  • AMBONYCHIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-MYALINIDA [Order]-AMBONYCHIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 172 Sp, 0 Var, 18 Img
  • AMITIDAE  HYOLITHA Taxon Tree: HYOLITHIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • AMMONITIDA (unassigned)  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]  (Sea)  (FOSSIL)  - 56 Sp, 0 Var, 2 Img
  • AMMONOIDEA (unassigned)  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]  (Sea)  (FOSSIL)  - 121 Sp, 0 Var, 41 Img
  • AMNICOLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TRUNCATELLOIDEA [Superfamily]  (Freshwater)  - 159 Sp, 21 Var, 40 Img
  • AMNIGENIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-ACTINODONTIDA [Order]-AMNIGENIOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 3 Sp, 0 Var, 3 Img
  • AMPEZZANILDIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-MATHILDOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 4 Img
  • AMPHIBOLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-HYGROPHILA [Order]-AMPHIBOLOIDEA [Superfamily]  (Sea)  - 18 Sp, 0 Var, 8 Img
  • AMPHIBULIMIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ORTHALICOIDEA [Superfamily]  (Land)  - 122 Sp, 17 Var, 68 Img
  • AMPHIMENIIDAE  SOLENOGASTRES Taxon Tree: SOLENOGASTRES [Subclass]-CAVIBELONIA [Order]  (Sea)  - 28 Sp, 0 Var, 10 Img
  • AMPHITOMARIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-ARCHITECTONICOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 3 Img
  • AMPHITRETIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-OCTOPODA [Order]-INCIRRATA [Suborder]-OCTOPODOIDEA [Superfamily]  (Sea)  - 3 Sp, 0 Var, 1 Img
  • AMPULLARIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-ARCHITAENIOGLOSSA [Order]-AMPULLARIOIDEA [Superfamily]  (Freshwater)  - 207 Sp, 35 Var, 127 Img
  • AMPULLINIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CAMPANILOIDEA [Superfamily]  (Sea)  - 172 Sp, 6 Var, 75 Img
  • ANABATHRIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TRUNCATELLOIDEA [Superfamily]  (Sea)  - 153 Sp, 15 Var, 66 Img
  • ANADENIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ARIONOIDEA [Superfamily]  (Land)  - 22 Sp, 0 Var, 4 Img
  • ANADONTELLIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-MYALINIDA [Order]-PROKOPIEVSKIOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • ANADROMIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-CLAUSILIOIDEA [Superfamily]  (Land)  (FOSSIL)  - 11 Sp, 0 Var, 10 Img
  • ANAHAMULINIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-TURRILITINA [Order]-HAMULINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 39 Sp, 0 Var, 20 Img
  • ANARCESTIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-ANARCESTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 23 Sp, 0 Var, 7 Img
  • ANASPIDEA (unassigned)  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-ANASPIDEA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • ANASTOMOPSIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-PUNCTOIDEA [Superfamily]  (Land)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • ANATINELLIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-MACTROIDEA [Superfamily]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • ANATOMIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-SCISSURELLOIDEA [Superfamily]  (Sea)  - 88 Sp, 1 Var, 29 Img
  • ANCILLARIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-OLIVOIDEA [Superfamily]  (Sea)  - 356 Sp, 20 Var, 342 Img
  • ANCISTROBASIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-SEGUENZIOIDEA [Superfamily]  (Sea)  - 13 Sp, 0 Var, 4 Img
  • ANCISTROCHEIRIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • ANCYLOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ANCYLOCERATINA [Suborder]-ANCYLOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 409 Sp, 39 Var, 34 Img
  • ANDERSSONOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-OTOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 23 Sp, 0 Var, 0 Img
  • ANETSHELLIDAE  ROSTROCONCHIA Taxon Tree: ANETSHELLOIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • ANGARIIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-ANGARIOIDEA [Superfamily]  (Sea)  - 55 Sp, 4 Var, 33 Img
  • ANGUSTICORNIDAE  HYOLITHA Taxon Tree: HYOLITHIDA [Order]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • ANISOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-TURRILITINA [Order]-TURRILITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 35 Sp, 0 Var, 11 Img
  • ANNULICONCHIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-HETEROPECTINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 3 Img
  • ANODONTOPSIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-ACTINODONTIDA [Order]-ANODONTOPSOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 0 Sp, 0 Var, 0 Img
  • ANOMALODESMATA (unassigned)  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • ANOMALOSAEPIIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-SEPIIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • ANOMIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-ANOMIOIDEA [Superfamily]  (Sea)  - 136 Sp, 6 Var, 52 Img
  • ANOMPHALIDAE  GASTROPODA Taxon Tree: EOGASTROPODA [Subclass]-EUOMPHALINA [Order]  (Sea)  (FOSSIL)  - 69 Sp, 0 Var, 6 Img
  • ANOPTYCHIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-MATHILDOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 13 Sp, 0 Var, 1 Img
  • ANOZYGIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-ACTEONINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 1 Img
  • ANTHRACOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-DIMORPHOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 29 Sp, 0 Var, 11 Img
  • ANTHRACOPUPIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-DENDROPUPOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • ANTHRACOSIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-ANTHRACOSIOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 36 Sp, 0 Var, 33 Img
  • ANTIJANIRIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-HETEROPECTINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 0 Img
  • ANTILLOCAPRINIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-HIPPURITIDA [Order]-CAPRINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 1 Img
  • ANTIPLEURIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-CYRTODONTIDA [Order]-ANTIPLEUROIDEA [Superfamily]  (Sea)  (FOSSIL)  - 11 Sp, 0 Var, 2 Img
  • ANULIDENTALIIDAE  SCAPHOPODA Taxon Tree: DENTALIIDA [Order]  (Sea)  - 2 Sp, 0 Var, 1 Img
  • APLACOPHORA (unassigned)  APLACOPHORA  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • APLOCOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-DANUBITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 0 Img
  • APLUSTRIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-ACTEONOIDEA [Superfamily]  (Sea)  - 15 Sp, 1 Var, 11 Img
  • APLYSIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-ANASPIDEA [Order]-APLYSIOIDEA [Superfamily]  (Sea)  - 116 Sp, 7 Var, 46 Img
  • APOCRINOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-DISCOSORIDA [Order]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 0 Img
  • APORRHAIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-STROMBOIDEA [Superfamily]  (Sea)  - 488 Sp, 11 Var, 290 Img
  • APSIDOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-BARRANDEOCERIDA [Order]  (Sea)  (FOSSIL)  - 18 Sp, 0 Var, 0 Img
  • AQABARELLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]  (Sea)  - 2 Sp, 0 Var, 0 Img
  • ARAEONEMATIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-TROCHOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 19 Sp, 0 Var, 2 Img
  • ARANUCIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-TRITONIOIDEA [Superfamily]  (Sea)  - 2 Sp, 0 Var, 0 Img
  • ARAXOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-OTOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 65 Sp, 0 Var, 1 Img
  • ARCESTIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-ARCESTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 105 Sp, 0 Var, 4 Img
  • ARCHAEOCARDIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-CARDITIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • ARCHAEOGASTROPODA (unassigned)  GASTROPODA Taxon Tree: ARCHAEOGASTROPODA [Subclass]  (Sea)  (FOSSIL)  - 73 Sp, 0 Var, 8 Img
  • ARCHAEOPHIALIDAE  MONOPLACOPHORA Taxon Tree: TRYBLIDIIDA [Order]-KIRINGELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 1 Img
  • ARCHAEOPRAGIDAE  MONOPLACOPHORA Taxon Tree: ARCHINACELLIDA [Order]-ARCHINACELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • ARCHAEOZONITIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-GASTRODONTOIDEA [Superfamily]  (Land)  (FOSSIL)  - 19 Sp, 0 Var, 0 Img
  • ARCHANODONTIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-UNIONIDA [Order]  (Freshwater)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • ARCHIACOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ONCOCERIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • ARCHINACELLIDAE  MONOPLACOPHORA Taxon Tree: ARCHINACELLIDA [Order]-ARCHINACELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 52 Sp, 1 Var, 16 Img
  • ARCHITECTONICIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-ARCHITECTONICOIDEA [Superfamily]  (Sea)  - 301 Sp, 17 Var, 201 Img
  • ARCHITEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • ARCIDA (unassigned)  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-ARCIDA [Order]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 0 Img
  • ARCIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-ARCIDA [Order]-ARCOIDEA [Superfamily]  (Sea)  - 786 Sp, 37 Var, 434 Img
  • ARCTICIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-ARCTICOIDEA [Superfamily]  (Sea)  - 101 Sp, 3 Var, 39 Img
  • ARCTOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-MEEKOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 32 Sp, 0 Var, 4 Img
  • ARCTOSTREIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-OSTREIDA [Order]-OSTREOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 3 Img
  • ARENEIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-ANGARIOIDEA [Superfamily]  (Sea)  - 53 Sp, 0 Var, 34 Img
  • ARENIGOMYIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-PHOLADOMYOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • ARGNIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-PUPILLOIDEA [Superfamily]  (Land)  - 38 Sp, 9 Var, 24 Img
  • ARGONAUTIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-OCTOPODA [Order]-INCIRRATA [Suborder]-ARGONAUTOIDEA [Superfamily]  (Sea)  - 14 Sp, 3 Var, 13 Img
  • ARIETITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-PSILOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 114 Sp, 1 Var, 28 Img
  • ARIOLIMACIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ARIONOIDEA [Superfamily]  (Land)  - 11 Sp, 1 Var, 5 Img
  • ARIONIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ARIONOIDEA [Superfamily]  (Land)  - 53 Sp, 1 Var, 25 Img
  • ARIONOCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-ORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 13 Sp, 0 Var, 5 Img
  • ARIOPHANTIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-HELICARIONOIDEA [Superfamily]  (Land)  - 604 Sp, 22 Var, 296 Img
  • ARMENOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]  (Sea)  (FOSSIL)  - 33 Sp, 0 Var, 5 Img
  • ARMINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-ARMINOIDEA [Superfamily]  (Sea)  - 118 Sp, 1 Var, 29 Img
  • ARPADITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-TRACHYCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • ASCOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ASCOCERIDA [Order]  (Sea)  (FOSSIL)  - 16 Sp, 0 Var, 5 Img
  • ASCOCERIDA (unassigned)  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ASCOCERIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • ASPENITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-SAGECERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 1 Img
  • ASPERSPINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-ACOCHLIDIACEA [Order]-PARHEDYLOIDEA [Superfamily]  (Sea)  - 6 Sp, 0 Var, 2 Img
  • ASPIDOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-PERISPHINCTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 119 Sp, 2 Var, 38 Img
  • ASSIMINEIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TRUNCATELLOIDEA [Superfamily]  (Sea)  - 309 Sp, 18 Var, 99 Img
  • ASTARTIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-CARDITIDA [Order]-CRASSATELLOIDEA [Superfamily]  (Sea)  - 270 Sp, 14 Var, 106 Img
  • ASTIERICERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ANCYLOCERATINA [Suborder]-DOUVILLEICERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 2 Img
  • ATAPHRIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]  (Sea)  (FOSSIL)  - 48 Sp, 0 Var, 18 Img
  • ATAXIOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-PERISPHINCTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 22 Sp, 0 Var, 6 Img
  • ATDABANITHIDAE  HYOLITHA Taxon Tree: HYOLITHIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • ATELEASPIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-CEPHALASPIDEA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • ATHORACOPHORIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ATHORACOPHOROIDEA [Superfamily]  (Land)  - 33 Sp, 0 Var, 1 Img
  • ATLANTIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-PTEROTRACHEOIDEA [Superfamily]  (Sea)  - 35 Sp, 0 Var, 27 Img
  • ATLANTOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-AGONIATITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 1 Img
  • ATOMODESMATIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-MYALINIDA [Order]-INOCERAMOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 82 Sp, 0 Var, 0 Img
  • ATURIIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-ATURIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 36 Sp, 0 Var, 4 Img
  • AUGURITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-AMIMAGONIATITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 1 Img
  • AULACOCERATIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-AULACOCERIDA [Order]  (Sea)  (FOSSIL)  - 19 Sp, 0 Var, 0 Img
  • AULACOCERIDA (unassigned)  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-AULACOCERIDA [Order]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 0 Img
  • AULACOMYELLIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-OSTREIDA [Order]-POSIDONIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 1 Var, 0 Img
  • AULACOSTEPHANIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-PERISPHINCTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 62 Sp, 1 Var, 9 Img
  • AULOCHITONIDAE  POLYPLACOPHORA Taxon Tree: PALEOLORICATA [Subclass]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • AUSTRALITEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-MYOPSIDA [Order]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • AUSTRALOTHECIDAE  HYOLITHA Taxon Tree: HYOLITHIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • AVICULOPECTINIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-AVICULOPECTINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 166 Sp, 0 Var, 26 Img
  • BABINKIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-BABINKOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 2 Img
  • BABYLONIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-MURICOIDEA [Superfamily]  (Sea)  - 27 Sp, 3 Var, 30 Img
  • BACTRITIDAE  CEPHALOPODA Taxon Tree: BACTRITOIDEA [Subclass]-BACTRITIDA [Order]  (Sea)  (FOSSIL)  - 35 Sp, 0 Var, 2 Img
  • BACULITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-TURRILITINA [Order]-TURRILITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 79 Sp, 3 Var, 11 Img
  • BADIOTITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-CERATITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • BAIDIOSTRACIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-ACTINODONTIDA [Order]-ANODONTOPSOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • BAJKALOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-INTEJOCERIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • BAKEVELLIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PTERIIDA [Order]-PTERIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 119 Sp, 2 Var, 13 Img
  • BALATONITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-CERATITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 35 Sp, 0 Var, 2 Img
  • BALKOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-PLECTRONOCERIDA [Order]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • BALTOCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-ORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 36 Sp, 0 Var, 5 Img
  • BALTODENTALIIDAE  SCAPHOPODA Taxon Tree: DENTALIIDA [Order]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • BARLEEIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-RISSOOIDEA [Superfamily]  (Sea)  - 109 Sp, 2 Var, 40 Img
  • BARRANDEOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-TARPHYCERIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • BARRANDOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-BARRANDEOCERIDA [Order]  (Sea)  (FOSSIL)  - 13 Sp, 0 Var, 2 Img
  • BARREMITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-DESMOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 33 Sp, 0 Var, 12 Img
  • BASSLEROCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ELLESMEROCERIDA [Order]  (Sea)  (FOSSIL)  - 42 Sp, 0 Var, 0 Img
  • BASTEROTIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-CYAMIOIDEA [Superfamily]  (Sea)  - 54 Sp, 1 Var, 25 Img
  • BATHMOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ELLESMEROCERIDA [Order]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 0 Img
  • BATHYDORIDIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-BATHYDORIDOIDEA [Superfamily]  (Sea)  - 8 Sp, 0 Var, 1 Img
  • BATHYHEDYLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-ACOCHLIDIACEA [Order]-ACOCHLIDIOIDEA [Superfamily]  (Sea)  - 1 Sp, 0 Var, 0 Img
  • BATHYPHYTOPHILIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-LEPETELLOIDEA [Superfamily]  (Sea)  - 3 Sp, 0 Var, 1 Img
  • BATHYPOLYPODIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-OCTOPODA [Order]-INCIRRATA [Suborder]-OCTOPODOIDEA [Superfamily]  (Sea)  - 7 Sp, 1 Var, 3 Img
  • BATHYSCIADIIDAE  GASTROPODA Taxon Tree: COCCULINIFORMIA [Subclass]-COCCULINOIDEA [Superfamily]  (Sea)  - 8 Sp, 0 Var, 1 Img
  • BATHYSPINULIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-NUCULANIDA [Order]-NUCULANOIDEA [Superfamily]  (Sea)  - 21 Sp, 0 Var, 6 Img
  • BATHYTEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-TEUTHIDA [Order]-BATHYTEUTHOIDEA [Superfamily]  (Sea)  - 3 Sp, 0 Var, 2 Img
  • BATILLARIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Sea)  - 79 Sp, 9 Var, 63 Img
  • BATOTEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • BEICHUANIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MEGALODONTIDA [Order]-MECYNODONTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • BELEMNITELLIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-BELEMNITIDA [Order]  (Sea)  (FOSSIL)  - 52 Sp, 0 Var, 27 Img
  • BELEMNITIDA (unassigned)  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-BELEMNITIDA [Order]  (Sea)  (FOSSIL)  - 23 Sp, 0 Var, 13 Img
  • BELEMNOPSEIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-BELEMNITIDA [Order]  (Sea)  (FOSSIL)  - 12 Sp, 1 Var, 6 Img
  • BELEMNOSEIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-SPIRULIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • BELEMNOTEUTHIDIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-BELEMNOIDEA [Superorder]-PHRAGMOTEUTHIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 1 Img
  • BELEMNOTEUTHIDIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-PHRAGMOTEUTHIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 1 Img
  • BELLEROPHINIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-PTEROTRACHEOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • BELLEROPHONTIDA (unassigned)  GASTROPODA Taxon Tree: AMPHIGASTROPODA [Subclass]-BELLEROPHONTIDA [Order]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • BELLEROPHONTIDAE  GASTROPODA Taxon Tree: AMPHIGASTROPODA [Subclass]-BELLEROPHONTIDA [Order]-BELLEROPHONTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 294 Sp, 2 Var, 26 Img
  • BELLOLIVIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-OLIVOIDEA [Superfamily]  (Sea)  - 0 Sp, 0 Var, 0 Img
  • BELOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-BELOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 21 Sp, 0 Var, 2 Img
  • BELOMITRIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-BUCCINOIDEA [Superfamily]  (Sea)  - 34 Sp, 4 Var, 27 Img
  • BELOPTERIIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-SPIRULIDA [Order]  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 5 Img
  • BELOSAEPIIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-SEPIIDA [Order]  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 5 Img
  • BELOTEUTHIDAE  CEPHALOPODA Taxon Tree: MESOTEUTHOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 1 Img
  • BENECKEIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-SAGECERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • BENTHOBIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-OLIVOIDEA [Superfamily]  (Sea)  - 19 Sp, 0 Var, 11 Img
  • BERENDINELLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-TRIPHOROIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • BERKHOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-DIMORPHOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 1 Img
  • BEYRICHITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-CERATITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 114 Sp, 0 Var, 7 Img
  • BILOCLYMENIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CLYMENIIDA [Order]-BILOCLYMENIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 16 Sp, 0 Var, 1 Img
  • BINNEYIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ARIONOIDEA [Superfamily]  (Land)  - 9 Sp, 0 Var, 4 Img
  • BINNEYITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-HAPLOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 10 Sp, 0 Var, 1 Img
  • BISATOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-THALASSOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 13 Sp, 0 Var, 0 Img
  • BITHYNIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TRUNCATELLOIDEA [Superfamily]  (Freshwater)  - 257 Sp, 23 Var, 89 Img
  • BIVALVIA INCERTAE SEDIS  BIVALVIA  (Sea)  (FOSSIL)  - 29 Sp, 0 Var, 11 Img
  • BOCHIANITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ANCYLOCERATINA [Suborder]-BOCHIANITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 38 Sp, 1 Var, 5 Img
  • BOETTGERILLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-LIMACOIDEA [Superfamily]  (Land)  - 2 Sp, 0 Var, 2 Img
  • BOGOSLOVSKYIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-PALLIOCERIDA [Order]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 0 Img
  • BOHAISPIRIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-LITTORINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 18 Sp, 0 Var, 0 Img
  • BOLETZKYIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-BOLETZKYIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • BOLITAENIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-OCTOPODA [Order]-INCIRRATA [Suborder]-OCTOPODOIDEA [Superfamily]  (Sea)  - 7 Sp, 1 Var, 2 Img
  • BORNELLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-TRITONIOIDEA [Superfamily]  (Sea)  - 11 Sp, 0 Var, 10 Img
  • BORSONIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-CONOIDEA [Superfamily]  (Sea)  - 452 Sp, 21 Var, 294 Img
  • BOSELLIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-SACOGLOSSA [Order]-PLAKOBRANCHACEA [Suborder]-PLAKOBRANCHOIDEA [Superfamily]  (Sea)  - 5 Sp, 0 Var, 1 Img
  • BOTHRIEMBRYONTIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ORTHALICOIDEA [Superfamily]  (Land)  - 138 Sp, 58 Var, 163 Img
  • BOUCHETISPIRIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-CONOIDEA [Superfamily]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • BRACHIOTEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order]  (Sea)  - 8 Sp, 0 Var, 2 Img
  • BRACHYCYCLOCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-DISSIDOCERIDA [Order]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 1 Img
  • BRACHYTREMATIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 26 Sp, 0 Var, 14 Img
  • BRADYBAENIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-HELICOIDEA [Superfamily]  (Land)  - 626 Sp, 321 Var, 600 Img
  • BRANCOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ACANTHOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 190 Sp, 1 Var, 28 Img
  • BRANSONIIDAE  ROSTROCONCHIA Taxon Tree: CONOCARDIIDA [Order]-CONOCARDIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 54 Sp, 1 Var, 12 Img
  • BREVICOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ONCOCERIDA [Order]  (Sea)  (FOSSIL)  - 15 Sp, 0 Var, 4 Img
  • BUCANELLIDAE  GASTROPODA Taxon Tree: AMPHIGASTROPODA [Subclass]-BELLEROPHONTIDA [Order]-BELLEROPHONTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 15 Sp, 0 Var, 0 Img
  • BUCANIIDAE  GASTROPODA Taxon Tree: AMPHIGASTROPODA [Subclass]-BELLEROPHONTIDA [Order]-BELLEROPHONTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 183 Sp, 2 Var, 20 Img
  • BUCCINIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-BUCCINOIDEA [Superfamily]  (Sea)  - 1727 Sp, 205 Var, 1180 Img
  • BUCHIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-BUCHIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 19 Sp, 1 Var, 4 Img
  • BUCHIOLIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-CYRTODONTIDA [Order]-PRAECARDIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • BUCHOTRIGONIIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-MYOPHORELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 16 Sp, 0 Var, 1 Img
  • BULIMULIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ORTHALICOIDEA [Superfamily]  (Land)  - 1058 Sp, 249 Var, 713 Img
  • BULLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-CEPHALASPIDEA [Order]-BULLOIDEA [Superfamily]  (Sea)  - 42 Sp, 8 Var, 27 Img
  • BULLINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-ACTEONOIDEA [Superfamily]  (Sea)  - 30 Sp, 2 Var, 19 Img
  • BURMESIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-THRACIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • BURSIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TONNOIDEA [Superfamily]  (Sea)  - 66 Sp, 29 Var, 88 Img
  • BUSYCONIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-BUCCINOIDEA [Superfamily]  (Sea)  - 105 Sp, 7 Var, 97 Img
  • BYRRANGOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-MEEKOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • BYTHINELLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TRUNCATELLOIDEA [Superfamily]  (Freshwater)  - 174 Sp, 15 Var, 73 Img
  • CADLINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-DORIDOIDEA [Superfamily]  (Sea)  - 45 Sp, 0 Var, 23 Img
  • CADOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-STEPHANOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 48 Sp, 0 Var, 11 Img
  • CAECIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TRUNCATELLOIDEA [Superfamily]  (Sea)  - 297 Sp, 6 Var, 163 Img
  • CAENOGASTROPODA (unassigned)  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]  (Sea)  (FOSSIL)  - 12 Sp, 1 Var, 2 Img
  • CALIPHYLLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-SACOGLOSSA [Order]-PLAKOBRANCHACEA [Suborder]-LIMAPONTIOIDEA [Superfamily]  (Sea)  - 27 Sp, 0 Var, 15 Img
  • CALLIODENTALIIDAE  SCAPHOPODA Taxon Tree: DENTALIIDA [Order]  (Sea)  - 4 Sp, 0 Var, 2 Img
  • CALLIOSTOMATIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-TROCHOIDEA [Superfamily]  (Sea)  - 579 Sp, 28 Var, 448 Img
  • CALLIOTROPIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-SEGUENZIOIDEA [Superfamily]  (Sea)  - 186 Sp, 4 Var, 117 Img
  • CALLISTOPLACIDAE  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]-CHITONIDA [Order]-CHITONINA [Suborder]-CHITONOIDEA [Superfamily]  (Sea)  - 56 Sp, 12 Var, 26 Img
  • CALLOCHITONIDAE  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]-CHITONIDA [Order]-CHITONINA [Suborder]-CHITONOIDEA [Superfamily]  (Sea)  - 48 Sp, 2 Var, 22 Img
  • CALMIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-FIONOIDEA [Superfamily]  (Sea)  - 2 Sp, 0 Var, 2 Img
  • CALOPIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TRUNCATELLOIDEA [Superfamily]  (Sea)  - 3 Sp, 0 Var, 0 Img
  • CALYCIDORIDIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-ONCHIDORIDOIDEA [Superfamily]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • CALYPTOPTOMATIDA (unassigned)  HYOLITHA Taxon Tree: CALYPTOPTOMATIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • CALYPTRAEIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-CALYPTRAEOIDEA [Superfamily]  (Sea)  - 252 Sp, 11 Var, 169 Img
  • CAMAENIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-CAMAENOIDEA [Superfamily]  (Land)  - 1419 Sp, 270 Var, 1064 Img
  • CAMBRIDIIDAE  STENOTHECOIDA Taxon Tree: CAMBRIDIOIDA [Order]  (Sea)  (FOSSIL)  - 21 Sp, 0 Var, 1 Img
  • CAMBROSCLERITIDA (unassigned)  MOLLUSCA INCERTAE SEDIS Taxon Tree: CAMBROSCLERITIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • CAMEROTHECIDAE  HYOLITHA Taxon Tree: CAMEROTHECIDA [Order]-CAMEROTHECINA [Suborder]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 2 Img
  • CAMPANILIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CAMPANILOIDEA [Superfamily]  (Sea)  - 14 Sp, 1 Var, 11 Img
  • CAMYIDAE  BIVALVIA Taxon Tree: FORDILLIDA [Order]-FORDILLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • CANARIELLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-HELICOIDEA [Superfamily]  (Land)  - 21 Sp, 1 Var, 13 Img
  • CANCELLARIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-CANCELLARIOIDEA [Superfamily]  (Sea)  - 822 Sp, 28 Var, 503 Img
  • CANTERBURYELLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • CAPRINIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-HIPPURITIDA [Order]-CAPRINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 18 Sp, 0 Var, 6 Img
  • CAPRINULIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-HIPPURITIDA [Order]-RADIOLITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 10 Sp, 0 Var, 6 Img
  • CAPRINULOIDEIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-HIPPURITIDA [Order]-CAPRINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 17 Sp, 0 Var, 3 Img
  • CAPROTINIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-HIPPURITIDA [Order]-RADIOLITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 10 Sp, 0 Var, 4 Img
  • CAPULIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-CAPULOIDEA [Superfamily]  (Sea)  - 170 Sp, 6 Var, 98 Img
  • CARBACTINOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ACTINOCERIDA [Order]  (Sea)  (FOSSIL)  - 21 Sp, 0 Var, 4 Img
  • CARCASSONNELLIDAE  MONOPLACOPHORA Taxon Tree: CYRTONELLIDA [Order]  (Sea)  (FOSSIL)  - 10 Sp, 0 Var, 0 Img
  • CARDIIDA (unassigned)  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-CARDIIDA [Order]  (Sea)  (FOSSIL)  - 103 Sp, 0 Var, 2 Img
  • CARDIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-CARDIOIDEA [Superfamily]  (Sea)  - 787 Sp, 70 Var, 467 Img
  • CARDILIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-MACTROIDEA [Superfamily]  (Sea)  - 7 Sp, 0 Var, 2 Img
  • CARDINIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-CARDITIDA [Order]-CARDITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 34 Sp, 0 Var, 11 Img
  • CARDIOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-STEPHANOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 57 Sp, 6 Var, 41 Img
  • CARDIOLARIIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-NUCULIDA [Order]-NUCULOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 14 Sp, 0 Var, 6 Img
  • CARDIOLIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-CYRTODONTIDA [Order]-CARDIOLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 34 Sp, 1 Var, 13 Img
  • CARDIOLITHIDAE  HYOLITHA Taxon Tree: SULCAVITIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • CARDITIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-CARDITIDA [Order]-CARDITOIDEA [Superfamily]  (Sea)  - 576 Sp, 32 Var, 239 Img
  • CARINARIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-PTEROTRACHEOIDEA [Superfamily]  (Sea)  - 13 Sp, 2 Var, 10 Img
  • CARINOCLYMENIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CLYMENIIDA [Order]-CYRTOCLYMENIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 1 Img
  • CARINOLITHIDAE  HYOLITHA Taxon Tree: HYOLITHIDA [Order]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • CARINOPELTIDAE  HELCIONELLOIDA Taxon Tree: ARCHAEOBRANCHIA [Subclass]-HELCIONELLIFORMES [Order]  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 5 Img
  • CARNITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-PINACOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • CARYDIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MODIOMORPHIDA [Order]-CYCLOCONCHACEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • CARYODIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ACAVOIDEA [Superfamily]  (Land)  - 18 Sp, 4 Var, 14 Img
  • CASSIANAXIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-ARCHITECTONICOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • CASSIANEBALIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-STREPTACIDOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 2 Img
  • CASSIANELLIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PTERIIDA [Order]-PTERIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 12 Sp, 0 Var, 0 Img
  • CASSIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TONNOIDEA [Superfamily]  (Sea)  - 239 Sp, 47 Var, 212 Img
  • CASSIOPIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 14 Sp, 0 Var, 10 Img
  • CATAEGIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-SEGUENZIOIDEA [Superfamily]  (Sea)  - 9 Sp, 0 Var, 4 Img
  • CATAMARCAIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-ARCIDA [Order]-ARCOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • CATANTOSTOMATIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-PLEUROTOMARIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • CAVOLINIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-THECOSOMATA [Order]-CAVOLINIOIDEA [Superfamily]  (Sea)  - 66 Sp, 14 Var, 50 Img
  • CAYMANABYSSIIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-LEPETELLOIDEA [Superfamily]  (Sea)  - 5 Sp, 0 Var, 3 Img
  • CELTITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-TURRILITINA [Order]-TROPITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 0 Img
  • CENOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]  (Sea)  (FOSSIL)  - 103 Sp, 0 Var, 7 Img
  • CENTROCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]  (Sea)  (FOSSIL)  - 11 Sp, 0 Var, 4 Img
  • CEPHALASPIDA (unassigned)  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-CEPHALASPIDEA [Order]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 1 Img
  • CEPHALASPIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-CEPHALASPIDEA [Order]  (Sea)  (FOSSIL)  - 24 Sp, 0 Var, 2 Img
  • CEPHALOPODA (unassigned)  CEPHALOPODA  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 1 Img
  • CEPOLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-HELICOIDEA [Superfamily]  (Land)  - 109 Sp, 20 Var, 43 Img
  • CERASTUIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ENOIDEA [Superfamily]  (Land)  - 83 Sp, 3 Var, 55 Img
  • CERATITIDA (unassigned)  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]  (Sea)  (FOSSIL)  - 23 Sp, 0 Var, 0 Img
  • CERATITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-CERATITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 90 Sp, 2 Var, 11 Img
  • CERATOCONIDAE  HELCIONELLOIDA Taxon Tree: ARCHAEOBRANCHIA [Subclass]-HELCIONELLIFORMES [Order]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 1 Img
  • CERATOMYIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MYIDA [Order]-PLEUROMYOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 30 Sp, 0 Var, 10 Img
  • CERATOMYOPSIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MEGALODONTIDA [Order]-MEGALODONTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 2 Img
  • CERATOTHECIDAE  HYOLITHA Taxon Tree: HYOLITHIDA [Order]-HYOLITHINA [Suborder]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 0 Img
  • CERIONIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ORTHALICOIDEA [Superfamily]  (Land)  - 449 Sp, 95 Var, 433 Img
  • CERITELLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-NERINEOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 31 Sp, 2 Var, 18 Img
  • CERITHIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Sea)  - 698 Sp, 122 Var, 457 Img
  • CERITHIOIDEA (unassigned)  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 13 Sp, 0 Var, 2 Img
  • CERITHIOPSIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-TRIPHOROIDEA [Superfamily]  (Sea)  - 885 Sp, 6 Var, 494 Img
  • CETOCONCHIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-POROMYOIDEA [Superfamily]  (Sea)  - 22 Sp, 0 Var, 8 Img
  • CHAENOCARDIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-CHAENOCARDIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 1 Img
  • CHAETODERMATIDAE  CAUDOFOVEATA Taxon Tree: CAUDOFOVEATA [Subclass]-CHAETODERMATIDA [Order]  (Sea)  - 85 Sp, 0 Var, 15 Img
  • CHAETOPLEURIDAE  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]-CHITONIDA [Order]-CHITONINA [Suborder]-CHITONOIDEA [Superfamily]  (Sea)  - 39 Sp, 4 Var, 23 Img
  • CHAMIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-CHAMOIDEA [Superfamily]  (Sea)  - 122 Sp, 14 Var, 100 Img
  • CHARCOTIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]  (Sea)  - 5 Sp, 0 Var, 3 Img
  • CHAROPIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-PUNCTOIDEA [Superfamily]  (Land)  - 600 Sp, 9 Var, 233 Img
  • CHEENEETNUKIIDAE  GASTROPODA Taxon Tree: ORTHOGASTROPODA [Subclass]-MURCHISONIINA [Order]-MURCHISONIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 13 Sp, 1 Var, 1 Img
  • CHEILOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-PRIONOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 69 Sp, 2 Var, 16 Img
  • CHIHLIOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ENDOCERIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • CHILINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-HYGROPHILA [Order]-CHILINOIDEA [Superfamily]  (Freshwater)  - 60 Sp, 7 Var, 29 Img
  • CHILODONTIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-SEGUENZIOIDEA [Superfamily]  (Sea)  - 182 Sp, 2 Var, 110 Img
  • CHIROTEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order]  (Sea)  - 24 Sp, 2 Var, 3 Img
  • CHITINOTEUTHIDIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-AULACOCERIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • CHITONIDAE  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]-CHITONIDA [Order]-CHITONINA [Suborder]-CHITONOIDEA [Superfamily]  (Sea)  - 208 Sp, 8 Var, 109 Img
  • CHLAMYDEPHORIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-RHYTIDOIDEA [Superfamily]  (Land)  - 8 Sp, 0 Var, 2 Img
  • CHOANOCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-ORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • CHONDRINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-CHONDRINOIDEA [Superfamily]  (Land)  - 88 Sp, 68 Var, 101 Img
  • CHONDRODONTIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-PLICATULOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 3 Img
  • CHORIPLACIDAE  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]-CHITONIDA [Order]-ACANTHOCHITONINA [Suborder]-CRYPTOPLACOIDEA [Superfamily]  (Sea)  - 2 Sp, 0 Var, 1 Img
  • CHORISTOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-CHORISTOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 14 Sp, 0 Var, 0 Img
  • CHRISTIOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-SCHISTOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • CHROMODORIDIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-DORIDOIDEA [Superfamily]  (Sea)  - 400 Sp, 7 Var, 281 Img
  • CHRONIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-GASTRODONTOIDEA [Superfamily]  (Land)  - 98 Sp, 13 Var, 53 Img
  • CHTENOPTERYGIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-TEUTHIDA [Order]-BATHYTEUTHOIDEA [Superfamily]  (Sea)  - 4 Sp, 0 Var, 1 Img
  • CHUCHLINIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-PERUNELOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • CIMIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-HETEROSTROPHA [Infraclass]  (Sea)  - 21 Sp, 0 Var, 10 Img
  • CINGULOPSIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-CINGULOPSOIDEA [Superfamily]  (Sea)  - 73 Sp, 3 Var, 14 Img
  • CIRCOTHECIDAE  HYOLITHA Taxon Tree: ORTHOTHECIDA [Order]  (Sea)  (FOSSIL)  - 51 Sp, 0 Var, 0 Img
  • CIRRIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-PORCELLIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 19 Sp, 0 Var, 5 Img
  • CIRROCTOPODIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-OCTOPODA [Order]-CIRRATA [Suborder]  (Sea)  - 4 Sp, 0 Var, 1 Img
  • CIRROTEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-OCTOPODA [Order]-CIRRATA [Suborder]  (Sea)  - 8 Sp, 0 Var, 4 Img
  • CLADISCITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-ARCESTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 45 Sp, 0 Var, 3 Img
  • CLARAIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-PTERINOPECTINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 0 Img
  • CLATHURELLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-CONOIDEA [Superfamily]  (Sea)  - 391 Sp, 20 Var, 214 Img
  • CLAUSILIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-CLAUSILIOIDEA [Superfamily]  (Land)  - 1569 Sp, 1257 Var, 1624 Img
  • CLAVAGELLIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-CLAVAGELLOIDEA [Superfamily]  (Sea)  - 32 Sp, 0 Var, 14 Img
  • CLAVATULIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-CONOIDEA [Superfamily]  (Sea)  - 328 Sp, 41 Var, 241 Img
  • CLEIDOTHAERIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-MYOCHAMOIDEA [Superfamily]  (Sea)  - 3 Sp, 0 Var, 1 Img
  • CLENCHIELLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TRUNCATELLOIDEA [Superfamily]  (Freshwater)  - 13 Sp, 0 Var, 13 Img
  • CLIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-THECOSOMATA [Order]-CAVOLINIOIDEA [Superfamily]  (Sea)  - 18 Sp, 3 Var, 13 Img
  • CLINOCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-ORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 3 Img
  • CLINOPISTHIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-SOLEMYIDA [Order]-SOLEMYOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 2 Img
  • CLIONIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-GYMNOSOMATA [Order]-CLIONOIDEA [Superfamily]  (Sea)  - 22 Sp, 6 Var, 22 Img
  • CLIONITITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-CLYDONITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 14 Sp, 0 Var, 0 Img
  • CLIOPSIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-GYMNOSOMATA [Order]-CLIONOIDEA [Superfamily]  (Sea)  - 4 Sp, 1 Var, 5 Img
  • CLISOSPIRIDAE  MOLLUSCA INCERTAE SEDIS Taxon Tree: MIMOSPIRIDA [Order]-CLISOSPIROIDEA [Superfamily]  (Sea)  (FOSSIL)  - 37 Sp, 0 Var, 1 Img
  • CLISTOCONCHIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-THRACIOIDEA [Superfamily]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • CLYDONAUTILIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-CLYDONAUTILOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 26 Sp, 0 Var, 0 Img
  • CLYDONICERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-STEPHANOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 1 Var, 5 Img
  • CLYDONITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-CLYDONITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • CLYMENIIDA (unassigned)  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CLYMENIIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • CLYMENIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CLYMENIIDA [Order]-CLYMENIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 15 Sp, 0 Var, 3 Img
  • CLYPEOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-MEEKOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • COCCULINELLIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-LEPETELLOIDEA [Superfamily]  (Sea)  - 4 Sp, 0 Var, 4 Img
  • COCCULINIDAE  GASTROPODA Taxon Tree: COCCULINIFORMIA [Subclass]-COCCULINOIDEA [Superfamily]  (Sea)  - 70 Sp, 1 Var, 27 Img
  • COCHLESPIRIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-CONOIDEA [Superfamily]  (Sea)  - 83 Sp, 14 Var, 62 Img
  • COCHLICELLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-HELICOIDEA [Superfamily]  (Land)  - 31 Sp, 3 Var, 21 Img
  • COCHLICOPIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-COCHLICOPOIDEA [Superfamily]  (Land)  - 58 Sp, 2 Var, 22 Img
  • COCHLIOPIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TRUNCATELLOIDEA [Superfamily]  (Freshwater)  - 341 Sp, 9 Var, 68 Img
  • COCHLOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-CHORISTOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • COCHLOSTOMATIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-ARCHITAENIOGLOSSA [Order]-CYCLOPHOROIDEA [Superfamily]  (Land)  - 83 Sp, 63 Var, 102 Img
  • CODONOCHEILIDAE  GASTROPODA Taxon Tree: EOGASTROPODA [Subclass]-EUOMPHALINA [Order]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • COELOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-EODEROCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 36 Sp, 1 Var, 5 Img
  • COELOCIONTIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ORTHALICOIDEA [Superfamily]  (Land)  - 2 Sp, 0 Var, 1 Img
  • COELODISCIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • COELOSTYLINIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]  (Sea)  (FOSSIL)  - 141 Sp, 0 Var, 3 Img
  • COILOPOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ACANTHOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 16 Sp, 0 Var, 7 Img
  • COLEOIDEA (unassigned)  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 1 Img
  • COLEOLIDAE  TENTACULITA Taxon Tree: COLEOLIDA [Order]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • COLINATYDIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-CEPHALASPIDEA [Order]-DIAPHANOIDEA [Superfamily]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • COLLIGNONICERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ACANTHOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 143 Sp, 2 Var, 29 Img
  • COLLONIIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-PHASIANELLOIDEA [Superfamily]  (Sea)  - 212 Sp, 4 Var, 122 Img
  • COLOMBELLINIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-STROMBOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 40 Sp, 0 Var, 24 Img
  • COLPODASPIDIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-CEPHALASPIDEA [Order]-PHILINOIDEA [Superfamily]  (Sea)  - 4 Sp, 0 Var, 2 Img
  • COLPOMYIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-COLPOMYIDA [Order]-COLPOMYOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • COLUBRARIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-BUCCINOIDEA [Superfamily]  (Sea)  - 79 Sp, 5 Var, 59 Img
  • COLUMBELLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-BUCCINOIDEA [Superfamily]  (Sea)  - 1051 Sp, 45 Var, 654 Img
  • COLUMBITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-DINARITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 58 Sp, 0 Var, 1 Img
  • CONDYLOCARDIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-CARDITIDA [Order]-CARDITOIDEA [Superfamily]  (Sea)  - 174 Sp, 0 Var, 41 Img
  • CONGERIOMORPHIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MEGALODONTIDA [Order]-MECYNODONTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • CONIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-CONOIDEA [Superfamily]  (Sea)  - 1550 Sp, 118 Var, 1195 Img
  • CONOCARDIIDAE  ROSTROCONCHIA Taxon Tree: CONOCARDIIDA [Order]-CONOCARDIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 68 Sp, 0 Var, 20 Img
  • CONOIDEA (unassigned)  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-CONOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 55 Sp, 0 Var, 7 Img
  • CONORBIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-CONOIDEA [Superfamily]  (Sea)  - 16 Sp, 0 Var, 12 Img
  • CORAMBIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-ONCHIDORIDOIDEA [Superfamily]  (Sea)  - 12 Sp, 0 Var, 4 Img
  • CORBULIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MYIDA [Order]-MYOIDEA [Superfamily]  (Sea)  - 364 Sp, 22 Var, 165 Img
  • COREOSPIRIDAE  HELCIONELLOIDA Taxon Tree: ARCHAEOBRANCHIA [Subclass]-HELCIONELLIFORMES [Order]-HELCIONELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 26 Sp, 0 Var, 5 Img
  • CORILLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-PLECTOPYLOIDEA [Superfamily]  (Land)  - 14 Sp, 2 Var, 14 Img
  • CORNIROSTRIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-HETEROSTROPHA [Infraclass]-VALVATOIDEA [Superfamily]  (Sea)  - 24 Sp, 0 Var, 14 Img
  • CORNULITIDAE  TENTACULITA Taxon Tree: CORNULITIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 1 Img
  • CORTINELLIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-NERITOPSOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • COSTACLYMENIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CLYMENIIDA [Order]-GONIOCLYMENIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 8 Sp, 1 Var, 2 Img
  • COSTASIELLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-SACOGLOSSA [Order]-PLAKOBRANCHACEA [Suborder]-LIMAPONTIOIDEA [Superfamily]  (Sea)  - 18 Sp, 0 Var, 8 Img
  • COSTATORIIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-TRIGONIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • COSTELLARIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-TURBINELLOIDEA [Superfamily]  (Sea)  - 580 Sp, 40 Var, 580 Img
  • COXICONCHIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-BABINKOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 1 Img
  • CRANCHIIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order]  (Sea)  - 41 Sp, 0 Var, 13 Img
  • CRASPEDOPOMATIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-ARCHITAENIOGLOSSA [Order]-CYCLOPHOROIDEA [Superfamily]  (Land)  - 13 Sp, 0 Var, 7 Img
  • CRASPEDOSTOMATIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]  (Sea)  (FOSSIL)  - 26 Sp, 1 Var, 0 Img
  • CRASSATELLIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-CARDITIDA [Order]-CRASSATELLOIDEA [Superfamily]  (Sea)  - 289 Sp, 7 Var, 134 Img
  • CRASSATELLOPSIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-ACTINODONTIDA [Order]-ORIOCRASSATELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 1 Var, 1 Img
  • CRASSILINIDAE  TENTACULITA Taxon Tree: DACRYOCONARIDA [Subclass]-NOWAKIIDA [Order]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • CRASSIMARGINATIDAE  GASTROPODA Taxon Tree: ORTHOGASTROPODA [Subclass]-MURCHISONIINA [Order]-LOXONEMATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • CRASSITUDOCHITONIDAE  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • CRAVENOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-NEOGLYPHIOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 50 Sp, 0 Var, 10 Img
  • CRESEIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-THECOSOMATA [Order]-CAVOLINIOIDEA [Superfamily]  (Sea)  - 16 Sp, 3 Var, 8 Img
  • CRESTJAHITIDAE  HYOLITHA Taxon Tree: HYOLITHIDA [Order]  (Sea)  (FOSSIL)  - 12 Sp, 0 Var, 0 Img
  • CRIOCERATITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ANCYLOCERATINA [Suborder]-ANCYLOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 138 Sp, 3 Var, 27 Img
  • CROSSEOLIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]  (Sea)  - 37 Sp, 0 Var, 9 Img
  • CRYPTAULACIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 69 Sp, 1 Var, 26 Img
  • CRYPTOPLACIDAE  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]-CHITONIDA [Order]-ACANTHOCHITONINA [Suborder]-CRYPTOPLACOIDEA [Superfamily]  (Sea)  - 20 Sp, 0 Var, 8 Img
  • CTENODONTIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-SOLEMYIDA [Order]-SOLEMYOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 79 Sp, 0 Var, 29 Img
  • CUCULLAEIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-ARCIDA [Order]-ARCOIDEA [Superfamily]  (Sea)  - 101 Sp, 0 Var, 31 Img
  • CUSPIDARIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-CUSPIDARIOIDEA [Superfamily]  (Sea)  - 304 Sp, 4 Var, 144 Img
  • CUVIERINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-THECOSOMATA [Order]-CAVOLINIOIDEA [Superfamily]  (Sea)  - 18 Sp, 0 Var, 7 Img
  • CYAMIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-CYAMIOIDEA [Superfamily]  (Sea)  - 52 Sp, 0 Var, 10 Img
  • CYCLOCELTITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-CHORISTOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • CYCLOCHLAMYDIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-PECTINOIDEA [Superfamily]  (Sea)  - 31 Sp, 0 Var, 13 Img
  • CYCLOCONCHIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-ACTINODONTIDA [Order]-ANODONTOPSOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 5 Img
  • CYCLOLOBIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-CYCLOLOBOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 53 Sp, 0 Var, 1 Img
  • CYCLOPHORIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-ARCHITAENIOGLOSSA [Order]-CYCLOPHOROIDEA [Superfamily]  (Land)  - 638 Sp, 63 Var, 371 Img
  • CYCLOSTOMICERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ELLESMEROCERIDA [Order]  (Sea)  (FOSSIL)  - 13 Sp, 0 Var, 0 Img
  • CYCLOTEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order]  (Sea)  - 4 Sp, 0 Var, 2 Img
  • CYLICHNIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-CEPHALASPIDEA [Order]-DIAPHANOIDEA [Superfamily]  (Sea)  - 211 Sp, 5 Var, 86 Img
  • CYLINDROBULLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-SACOGLOSSA [Order]-OXYNOACEA [Suborder]-CYLINDROBULLOIDEA [Superfamily]  (Sea)  - 7 Sp, 0 Var, 2 Img
  • CYLINDROBULLINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-ACTEONOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 45 Sp, 0 Var, 14 Img
  • CYLINDROTEUTHIDIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-BELEMNITIDA [Order]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 1 Img
  • CYMACLYMENIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CLYMENIIDA [Order]-CYRTOCLYMENIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 61 Sp, 0 Var, 9 Img
  • CYMATOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-NAUTILITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 72 Sp, 0 Var, 3 Img
  • CYMBITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-PSILOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 1 Img
  • CYMBULIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-THECOSOMATA [Order]-CYMBULIOIDEA [Superfamily]  (Sea)  - 11 Sp, 0 Var, 8 Img
  • CYPRAEIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-CYPRAEOIDEA [Superfamily]  (Sea)  - 629 Sp, 444 Var, 806 Img
  • CYPRICARDINIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MODIOMORPHIDA [Order]-MODIOMORPHOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 17 Sp, 0 Var, 8 Img
  • CYRENIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-CYRENOIDEA [Superfamily]  (Freshwater)  - 233 Sp, 4 Var, 120 Img
  • CYRENOIDIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-CYRENOIDOIDEA [Superfamily]  (Sea)  - 7 Sp, 0 Var, 1 Img
  • CYRTENDOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ENDOCERIDA [Order]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • CYRTOCERINIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ELLESMEROCERIDA [Order]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 1 Img
  • CYRTOCLYMENIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CLYMENIIDA [Order]-CYRTOCLYMENIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 66 Sp, 2 Var, 4 Img
  • CYRTODONTIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-CYRTODONTIDA [Order]-CYRTODONTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 152 Sp, 2 Var, 55 Img
  • CYRTOGOMPHOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-DISCOSORIDA [Order]  (Sea)  (FOSSIL)  - 34 Sp, 0 Var, 6 Img
  • CYRTOLITIDAE  MONOPLACOPHORA Taxon Tree: CYRTONELLIDA [Order]  (Sea)  (FOSSIL)  - 57 Sp, 3 Var, 8 Img
  • CYRTONELLIDA (unassigned)  MONOPLACOPHORA Taxon Tree: CYRTONELLIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • CYRTONELLIDAE  MONOPLACOPHORA Taxon Tree: CYRTONELLIDA [Order]-CYRTONELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • CYSTISCIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-MURICOIDEA [Superfamily]  (Sea)  - 432 Sp, 6 Var, 276 Img
  • CYSTOPELTIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-PUNCTOIDEA [Superfamily]  (Land)  - 5 Sp, 0 Var, 2 Img
  • DACTYLIOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-EODEROCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 108 Sp, 0 Var, 45 Img
  • DAMILINIDAE  GASTROPODA Taxon Tree: PATELLOGASTROPODA [Subclass]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 0 Img
  • DANUBITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-DANUBITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 20 Sp, 0 Var, 0 Img
  • DAONELLIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-OSTREIDA [Order]-POSIDONIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 19 Sp, 0 Var, 2 Img
  • DARAELITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-PROLECANITIDA [Order]-PROLECANITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 30 Sp, 0 Var, 2 Img
  • DAWSONELLIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-HELICINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • DAWSONOCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-ORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 15 Sp, 0 Var, 2 Img
  • DEIANIRIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-HELICINOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 3 Sp, 0 Var, 2 Img
  • DELEPINOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-GONIATITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 24 Sp, 0 Var, 3 Img
  • DELPHINULOPSIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-NERITOPSOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 169 Sp, 0 Var, 8 Img
  • DELTOCERATIDAE  CEPHALOPODA  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 1 Img
  • DELTOPECTINIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-AVICULOPECTINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 65 Sp, 0 Var, 4 Img
  • DENDRODORIDIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-PHYLLIDIOIDEA [Superfamily]  (Sea)  - 112 Sp, 0 Var, 39 Img
  • DENDRONOTIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-TRITONIOIDEA [Superfamily]  (Sea)  - 22 Sp, 1 Var, 11 Img
  • DENDROPUPIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-DENDROPUPOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • DENTALIIDAE  SCAPHOPODA Taxon Tree: DENTALIIDA [Order]  (Sea)  - 384 Sp, 4 Var, 175 Img
  • DENTOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • DEPRESSIZONIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-SCISSURELLOIDEA [Superfamily]  (Sea)  - 2 Sp, 0 Var, 2 Img
  • DESERTELLIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-TRIGONODOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • DESHAYESITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ANCYLOCERATINA [Suborder]-DESHAYESITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 105 Sp, 10 Var, 51 Img
  • DESMOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-DESMOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 232 Sp, 3 Var, 49 Img
  • DESMOPTERIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-THECOSOMATA [Order]-CYMBULIOIDEA [Superfamily]  (Sea)  - 4 Sp, 0 Var, 3 Img
  • DEVONOPRONORITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-GEPHUROCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • DIALIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Sea)  - 26 Sp, 4 Var, 14 Img
  • DIAPHANIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-CEPHALASPIDEA [Order]-DIAPHANOIDEA [Superfamily]  (Sea)  - 50 Sp, 0 Var, 17 Img
  • DIAPHERIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-STREPTAXOIDEA [Superfamily]  (Land)  - 48 Sp, 1 Var, 21 Img
  • DIASTOMATIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Sea)  - 44 Sp, 1 Var, 28 Img
  • DICERATIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-HIPPURITIDA [Order]-RADIOLITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 3 Img
  • DICEROCARDIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MEGALODONTIDA [Order]-MEGALODONTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • DICOELITIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-BELEMNITIDA [Order]  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 0 Img
  • DICRICOCONIDAE  TENTACULITA Taxon Tree: CHONIOCONARIDA [Subclass]-TROMPETOCONARIDA [Superorder]-VOLYNITIDA [Order]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 3 Img
  • DIDYMITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-TROPITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 0 Img
  • DIENEROCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-MEEKOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 21 Sp, 0 Var, 2 Img
  • DIESTOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ONCOCERIDA [Order]  (Sea)  (FOSSIL)  - 37 Sp, 0 Var, 3 Img
  • DIMEROCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-DIMEROCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 23 Sp, 1 Var, 3 Img
  • DIMITOBELIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-BELEMNITIDA [Order]-BELEMNOPSEINA [Suborder]  (Sea)  (FOSSIL)  - 11 Sp, 0 Var, 1 Img
  • DIMORPHOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-DIMORPHOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 36 Sp, 0 Var, 5 Img
  • DIMYIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-DIMYOIDEA [Superfamily]  (Sea)  - 35 Sp, 0 Var, 9 Img
  • DINARITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-DINARITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • DIOZOPTYXIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CAMPANILOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 1 Img
  • DIPLOBELIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DIPLOBELIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • DIPLOMMATINIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-ARCHITAENIOGLOSSA [Order]-CYCLOPHOROIDEA [Superfamily]  (Land)  - 455 Sp, 54 Var, 273 Img
  • DIPLOMOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-TURRILITINA [Order]-TURRILITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 46 Sp, 0 Var, 4 Img
  • DIPLOTHECIDAE  HYOLITHA Taxon Tree: CAMEROTHECIDA [Order]-DIPLOTHECINA [Suborder]  (Sea)  (FOSSIL)  - 4 Sp, 1 Var, 1 Img
  • DIPOLOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • DIRONIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]  (Sea)  - 4 Sp, 0 Var, 4 Img
  • DISCIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-PUNCTOIDEA [Superfamily]  (Land)  - 68 Sp, 4 Var, 22 Img
  • DISCOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-TARPHYCERIDA [Order]  (Sea)  (FOSSIL)  - 19 Sp, 0 Var, 2 Img
  • DISCODORIDIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-DORIDOIDEA [Superfamily]  (Sea)  - 368 Sp, 6 Var, 164 Img
  • DISCOHELICIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]  (Sea)  (FOSSIL)  - 48 Sp, 0 Var, 13 Img
  • DISCOPHYLLITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-PHYLLOCERATIDA [Order]-PHYLLOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 11 Sp, 0 Var, 1 Img
  • DISCOSORIDA (unassigned)  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-DISCOSORIDA [Order]  (Sea)  (FOSSIL)  - 18 Sp, 0 Var, 3 Img
  • DISCOSORIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-DISCOSORIDA [Order]  (Sea)  (FOSSIL)  - 16 Sp, 0 Var, 6 Img
  • DISSIDOCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-DISSIDOCERIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • DISTICHITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-TRACHYCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 14 Sp, 0 Var, 0 Img
  • DOLOMITELLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-ARCHITECTONICOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 0 Sp, 0 Var, 0 Img
  • DOLPONELLIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-BUCHIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • DOMATOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]  (Sea)  (FOSSIL)  - 14 Sp, 0 Var, 2 Img
  • DONACIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-TELLINOIDEA [Superfamily]  (Sea)  - 164 Sp, 15 Var, 106 Img
  • DONALDINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-STREPTACIDOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 39 Sp, 1 Var, 15 Img
  • DONDERSIIDAE  SOLENOGASTRES Taxon Tree: SOLENOGASTRES [Subclass]-PHOLIDOSKEPIA [Order]  (Sea)  - 32 Sp, 1 Var, 7 Img
  • DONOVANICONIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DONOVANICONIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • DORCASIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-STROPHOCHEILOIDEA [Superfamily]  (Land)  - 14 Sp, 0 Var, 5 Img
  • DORIDIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-DORIDOIDEA [Superfamily]  (Sea)  - 143 Sp, 1 Var, 31 Img
  • DORIDOMORPHIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-ARMINOIDEA [Superfamily]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • DORIDOXIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-DORIDOXOIDEA [Superfamily]  (Sea)  - 3 Sp, 0 Var, 1 Img
  • DORSOJUGATIDAE  HYOLITHA Taxon Tree: SULCAVITIDA [Order]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • DORSOPLANITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-PERISPHINCTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 25 Sp, 1 Var, 14 Img
  • DOTIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]  (Sea)  - 103 Sp, 1 Var, 35 Img
  • DOUVILLEICERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ANCYLOCERATINA [Suborder]-DOUVILLEICERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 32 Sp, 2 Var, 11 Img
  • DRAPARNAUDIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-PARTULOIDEA [Superfamily]  (Land)  - 7 Sp, 0 Var, 2 Img
  • DREISSENIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-DREISSENOIDEA [Superfamily]  (Freshwater)  - 60 Sp, 3 Var, 18 Img
  • DREPANOMENIIDAE  SOLENOGASTRES Taxon Tree: SOLENOGASTRES [Subclass]-CAVIBELONIA [Order]  (Sea)  - 6 Sp, 0 Var, 1 Img
  • DRILLIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-CONOIDEA [Superfamily]  (Sea)  - 797 Sp, 14 Var, 431 Img
  • DRONOVITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-TRACHYCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • DUALINIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-CYRTODONTIDA [Order]-DUALINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • DUVALIIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-BELEMNITIDA [Order]  (Sea)  (FOSSIL)  - 33 Sp, 1 Var, 27 Img
  • DYAKIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-DYAKIOIDEA [Superfamily]  (Land)  - 68 Sp, 30 Var, 57 Img
  • DYCHEIIDAE  POLYPLACOPHORA  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • DZHULFITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-XENODISCOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 32 Sp, 0 Var, 24 Img
  • EATONIELLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-CINGULOPSOIDEA [Superfamily]  (Sea)  - 117 Sp, 3 Var, 28 Img
  • ECHINICHIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-XANTHONYCHOIDEA [Superfamily]  (Land)  - 3 Sp, 0 Var, 2 Img
  • ECHINOCHITONIDAE  POLYPLACOPHORA Taxon Tree: PALEOLORICATA [Subclass]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • ECHINOFULGURIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-BUCCINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 18 Sp, 2 Var, 13 Img
  • ECHIOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-PSILOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 34 Sp, 0 Var, 17 Img
  • EDMONDIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-HIATELLIDA [Order]-EDMONDIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 53 Sp, 0 Var, 15 Img
  • ELACHISINIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TRUNCATELLOIDEA [Superfamily]  (Sea)  - 46 Sp, 1 Var, 20 Img
  • ELASMONEMATIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-TROCHOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 50 Sp, 0 Var, 6 Img
  • ELIGMIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-OSTREIDA [Order]-OSTREOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 4 Img
  • ELLESMEROCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ELLESMEROCERIDA [Order]  (Sea)  (FOSSIL)  - 100 Sp, 0 Var, 15 Img
  • ELLESMEROCERIDA (unassigned)  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ELLESMEROCERIDA [Order]  (Sea)  (FOSSIL)  - 26 Sp, 0 Var, 17 Img
  • ELLOBIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-EUPULMONATA [Order]-ELLOBIOIDEA [Superfamily]  (Land)  - 357 Sp, 19 Var, 221 Img
  • ELONIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-HELICOIDEA [Superfamily]  (Land)  - 21 Sp, 2 Var, 5 Img
  • EMBLANDIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-RISSOOIDEA [Superfamily]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • EMBLETONIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]  (Sea)  - 4 Sp, 0 Var, 2 Img
  • EMERICICERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ANCYLOCERATINA [Suborder]-ANCYLOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 54 Sp, 5 Var, 10 Img
  • EMMONSOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ENDOCERIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • ENDOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ENDOCERIDA [Order]  (Sea)  (FOSSIL)  - 83 Sp, 0 Var, 12 Img
  • ENDOCERIDA (unassigned)  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ENDOCERIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 1 Img
  • ENDODONTIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-PUNCTOIDEA [Superfamily]  (Land)  - 186 Sp, 5 Var, 44 Img
  • ENGONOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ENGONOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 30 Sp, 1 Var, 6 Img
  • ENGORTHOCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-ORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • ENIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ENOIDEA [Superfamily]  (Land)  - 450 Sp, 68 Var, 264 Img
  • ENOPLOTEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order]  (Sea)  - 44 Sp, 0 Var, 20 Img
  • ENTALINIDAE  SCAPHOPODA Taxon Tree: GADILIDA [Order]  (Sea)  - 38 Sp, 1 Var, 18 Img
  • ENTEROCTOPODIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-OCTOPODA [Order]-INCIRRATA [Suborder]-OCTOPODOIDEA [Superfamily]  (Sea)  - 27 Sp, 1 Var, 3 Img
  • ENTOGONITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-NOMISMOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 12 Sp, 0 Var, 1 Img
  • ENTOLIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-PECTINOIDEA [Superfamily]  (Sea)  - 36 Sp, 2 Var, 8 Img
  • ENTOLIOIDESIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-ENTOLIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • ENTOLIOIDIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-PECTINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • EOACMAEIDAE  GASTROPODA Taxon Tree: PATELLOGASTROPODA [Subclass]-EOACMAEOIDEA [Superfamily]  (Sea)  - 13 Sp, 1 Var, 9 Img
  • EOCYPRAEIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-CYPRAEOIDEA [Superfamily]  (Sea)  - 65 Sp, 4 Var, 14 Img
  • EODEROCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-EODEROCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 60 Sp, 2 Var, 20 Img
  • EODONIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-CARDITIDA [Order]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 0 Img
  • EOGASTROPODA (unassigned)  GASTROPODA Taxon Tree: EOGASTROPODA [Subclass]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • EOGONIOLOBOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-DIMORPHOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 14 Sp, 0 Var, 0 Img
  • EOPTERIIDAE  ROSTROCONCHIA Taxon Tree: CONOCARDIIDA [Order]-EOPTERIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 25 Sp, 2 Var, 17 Img
  • EOSAGENITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-PTYCHITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • EOSCHIZODIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-TRIGONIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 1 Img
  • EOTHINOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ELLESMEROCERIDA [Order]  (Sea)  (FOSSIL)  - 11 Sp, 0 Var, 5 Img
  • EOTOMARIIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-EOTOMARIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 129 Sp, 1 Var, 37 Img
  • EPHIPPOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-CLYDONAUTILOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 1 Img
  • EPIDICERATIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-HIPPURITIDA [Order]-REQUIENIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 0 Img
  • EPIGRIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TRUNCATELLOIDEA [Superfamily]  (Sea)  - 5 Sp, 0 Var, 1 Img
  • EPIMENIIDAE  SOLENOGASTRES Taxon Tree: SOLENOGASTRES [Subclass]-CAVIBELONIA [Order]  (Sea)  - 7 Sp, 0 Var, 3 Img
  • EPIPHRAGMOPHORIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-HELICOIDEA [Superfamily]  (Land)  - 50 Sp, 5 Var, 27 Img
  • EPIROBIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ORTHALICOIDEA [Superfamily]  (Land)  - 19 Sp, 2 Var, 1 Img
  • EPISCULITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-TROPITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 0 Img
  • EPITONIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-EPITONIOIDEA [Superfamily]  (Sea)  - 1033 Sp, 19 Var, 678 Img
  • ERIDITIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-ORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • ERITROPIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-AFGHANODESMATIDA [Order]-AFGHANODESMATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 1 Img
  • ERODONIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MYIDA [Order]-MYOIDEA [Superfamily]  (Sea)  - 3 Sp, 0 Var, 1 Img
  • ESKIMOCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-ORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • ESTONIOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-TARPHYCERIDA [Order]  (Sea)  (FOSSIL)  - 26 Sp, 0 Var, 3 Img
  • ETHERIIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-UNIONIDA [Order]-ETHERIOIDEA [Superfamily]  (Freshwater)  - 4 Sp, 0 Var, 4 Img
  • EUBRANCHIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-FIONOIDEA [Superfamily]  (Sea)  - 59 Sp, 0 Var, 23 Img
  • EUCHONDRIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-EUCHONDRIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 37 Sp, 0 Var, 3 Img
  • EUCIROIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-VERTICORDIOIDEA [Superfamily]  (Sea)  - 15 Sp, 1 Var, 8 Img
  • EUCOCHLIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-TROCHOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • EUCONULIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-GASTRODONTOIDEA [Superfamily]  (Land)  - 278 Sp, 18 Var, 45 Img
  • EUCYCLIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-SEGUENZIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 74 Sp, 3 Var, 26 Img
  • EUCYCLOSCALIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-SEGUENZIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 27 Sp, 0 Var, 7 Img
  • EULIMIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-VANIKOROIDEA [Superfamily]  (Sea)  - 1145 Sp, 12 Var, 333 Img
  • EULOXIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-CARDIIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • EUNEMOPSIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-SEGUENZIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • EUOMPHALIDAE  GASTROPODA Taxon Tree: EOGASTROPODA [Subclass]-EUOMPHALINA [Order]-EUOMPHALOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 326 Sp, 2 Var, 44 Img
  • EUOMPHALINA (unassigned)  GASTROPODA Taxon Tree: EOGASTROPODA [Subclass]-EUOMPHALINA [Order]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • EUOMPHALOIDEA (unassigned)  GASTROPODA Taxon Tree: EOGASTROPODA [Subclass]-EUOMPHALINA [Order]-EUOMPHALOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 29 Sp, 0 Var, 2 Img
  • EUPHEMITIDAE  GASTROPODA Taxon Tree: AMPHIGASTROPODA [Subclass]-BELLEROPHONTIDA [Order]-BELLEROPHONTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 102 Sp, 1 Var, 4 Img
  • EUPLEUROCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-NEOICOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • EURYDESMATIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-EURYDESMATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 24 Sp, 1 Var, 0 Img
  • EUSTOMATIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • EVYANIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-COLPOMYIDA [Order]-COLPOMYOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • FACELINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-AEOLIDIOIDEA [Superfamily]  (Sea)  - 183 Sp, 2 Var, 92 Img
  • FALCATODONTIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-CYRTODONTIDA [Order]-FALCATODONTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • FALSICINGULIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TRUNCATELLOIDEA [Superfamily]  (Sea)  - 8 Sp, 0 Var, 1 Img
  • FAREWELLIIDAE  GASTROPODA Taxon Tree: ORTHOGASTROPODA [Subclass]-MURCHISONIINA [Order]-MURCHISONIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • FASCIOLARIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-BUCCINOIDEA [Superfamily]  (Sea)  - 1063 Sp, 62 Var, 713 Img
  • FAUXULIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-PUPILLOIDEA [Superfamily]  (Land)  - 11 Sp, 0 Var, 7 Img
  • FEDAIELLIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-NERITOPSOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 12 Sp, 0 Var, 2 Img
  • FERGANOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-NEOGLYPHIOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 1 Img
  • FERGANOCONCHIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-ANTHRACOSIOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • FERUSSACIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ACHATINOIDEA [Superfamily]  (Land)  - 90 Sp, 4 Var, 31 Img
  • FERUSSINIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-ARCHITAENIOGLOSSA [Order]-CYCLOPHOROIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 4 Sp, 1 Var, 2 Img
  • FICIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-FICOIDEA [Superfamily]  (Sea)  - 87 Sp, 8 Var, 52 Img
  • FILHOLIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-CLAUSILIOIDEA [Superfamily]  (Land)  (FOSSIL)  - 80 Sp, 5 Var, 3 Img
  • FIONIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-FIONOIDEA [Superfamily]  (Sea)  - 152 Sp, 1 Var, 61 Img
  • FISSURELLIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-FISSURELLOIDEA [Superfamily]  (Sea)  - 674 Sp, 22 Var, 457 Img
  • FLABELLINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-FLABELLINOIDEA [Superfamily]  (Sea)  - 95 Sp, 2 Var, 53 Img
  • FLEMINGITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-MEEKOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 54 Sp, 0 Var, 2 Img
  • FLEMINGOSTREIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-OSTREIDA [Order]-OSTREOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 1 Img
  • FLICKIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ACANTHOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 14 Sp, 0 Var, 1 Img
  • FORBESICERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ACANTHOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 11 Sp, 0 Var, 7 Img
  • FORDILLIDAE  BIVALVIA Taxon Tree: FORDILLIDA [Order]-FORDILLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 2 Img
  • FREJIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-ARCIDA [Order]-ARCOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • FUSTIARIIDAE  SCAPHOPODA Taxon Tree: DENTALIIDA [Order]  (Sea)  - 23 Sp, 0 Var, 20 Img
  • GADILIDAE  SCAPHOPODA Taxon Tree: GADILIDA [Order]  (Sea)  - 260 Sp, 3 Var, 101 Img
  • GADILINIDAE  SCAPHOPODA Taxon Tree: DENTALIIDA [Order]  (Sea)  - 31 Sp, 0 Var, 15 Img
  • GAIMARDIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-GAIMARDIOIDEA [Superfamily]  (Sea)  - 18 Sp, 1 Var, 3 Img
  • GAKIDAE  HYOLITHA Taxon Tree: SULCAVITIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • GALATHEAVALVIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-CYAMIOIDEA [Superfamily]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • GALEOMMATIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-GALEOMMATOIDEA [Superfamily]  (Sea)  - 166 Sp, 0 Var, 57 Img
  • GALFETTITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-MEEKOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 16 Sp, 0 Var, 0 Img
  • GALICORNIDAE  HYOLITHA Taxon Tree: HYOLITHIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • GASTRIOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-GASTRIOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 36 Sp, 0 Var, 5 Img
  • GASTROCHAENIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]--GASTROCHAENOIDEA [Superfamily]  (Sea)  - 63 Sp, 3 Var, 30 Img
  • GASTROCOPTIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-PUPILLOIDEA [Superfamily]  (Land)  - 107 Sp, 8 Var, 27 Img
  • GASTRODONTIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-GASTRODONTOIDEA [Superfamily]  (Land)  - 77 Sp, 0 Var, 26 Img
  • GASTROPODA INCERTAE SEDIS  GASTROPODA INCERTAE SEDIS  (Sea)  (FOSSIL)  - 28 Sp, 0 Var, 7 Img
  • GASTROPTERIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-CEPHALASPIDEA [Order]-PHILINOIDEA [Superfamily]  (Sea)  - 34 Sp, 1 Var, 18 Img
  • GATTENDORFIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-PRIONOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 60 Sp, 1 Var, 6 Img
  • GAUDRYCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-TETRAGONITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 60 Sp, 0 Var, 11 Img
  • GEISONOCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-ORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 37 Sp, 1 Var, 9 Img
  • GEOPELTIDIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-VAMPYROMORPHA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • GEORGINIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ACTINOCERIDA [Order]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • GEPHUROCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-GEPHUROCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 94 Sp, 4 Var, 17 Img
  • GIGANTOCAPULIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-VANIKOROIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 1 Img
  • GIRTYOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-DIMORPHOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 71 Sp, 0 Var, 13 Img
  • GLACIDORBIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-GLACIDORBOIDEA [Superfamily]  (Freshwater)  - 23 Sp, 0 Var, 18 Img
  • GLAPHYRITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-GASTRIOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 96 Sp, 0 Var, 6 Img
  • GLATZIELLIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CLYMENIIDA [Order]-PLATYCLYMENIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 16 Sp, 0 Var, 5 Img
  • GLAUCIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-AEOLIDIOIDEA [Superfamily]  (Sea)  - 23 Sp, 0 Var, 10 Img
  • GLAUCONOMIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-CYRENOIDEA [Superfamily]  (Sea)  - 12 Sp, 1 Var, 7 Img
  • GLOBOCORNIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-NERITOPSOIDEA [Superfamily]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • GLOBORILIDAE  HYOLITHA Taxon Tree: GLOBORILIDA [Order]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 1 Img
  • GLOSSIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-GLOSSOIDEA [Superfamily]  (Sea)  - 34 Sp, 5 Var, 17 Img
  • GLYCYMERIDIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-ARCIDA [Order]-ARCOIDEA [Superfamily]  (Sea)  - 293 Sp, 15 Var, 144 Img
  • GLYPTARCIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-ARCIDA [Order]-GLYPTARCOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • GONATIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order]  (Sea)  - 19 Sp, 2 Var, 16 Img
  • GONIAEOLIDIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]  (Sea)  - 3 Sp, 0 Var, 1 Img
  • GONIASMATIDAE  GASTROPODA Taxon Tree: ARCHAEOGASTROPODA [Subclass]  (Sea)  (FOSSIL)  - 80 Sp, 0 Var, 7 Img
  • GONIATITIDA (unassigned)  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • GONIATITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-GONIATITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 108 Sp, 1 Var, 28 Img
  • GONIOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ACTINOCERIDA [Order]  (Sea)  (FOSSIL)  - 16 Sp, 0 Var, 3 Img
  • GONIOCLYMENIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CLYMENIIDA [Order]-GONIOCLYMENIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 23 Sp, 0 Var, 4 Img
  • GONIODORIDIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-ONCHIDORIDOIDEA [Superfamily]  (Sea)  - 134 Sp, 0 Var, 91 Img
  • GONIOLOBOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-GONIOLOBOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 10 Sp, 0 Var, 1 Img
  • GONIONAUTILIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-CLYDONAUTILOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • GONIONOWAKIIDAE  TENTACULITA Taxon Tree: DACRYOCONARIDA [Subclass]-GONIONOWAKIIDA [Order]  (Sea)  (FOSSIL)  - 15 Sp, 0 Var, 0 Img
  • GONIOPHORINIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-MYTILIDA [Order]-MODIOLOPSOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 1 Img
  • GORDENELLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-MATHILDOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 74 Sp, 0 Var, 14 Img
  • GOSSELETINIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-EOTOMARIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 615 Sp, 7 Var, 63 Img
  • GOTLANDELLITIDAE  TENTACULITA Taxon Tree: TENTACULITIDA [Order]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 1 Img
  • GOTLANDOCHITONIDAE  POLYPLACOPHORA Taxon Tree: PALEOLORICATA [Subclass]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 0 Img
  • GRACILITHECIDAE  HYOLITHA Taxon Tree: ORTHOTHECIDA [Order]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 0 Img
  • GRACILOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ONCOCERIDA [Order]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • GRAMMYSIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-GRAMMYSIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 50 Sp, 1 Var, 20 Img
  • GRANDIPATULIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-GASTRODONTOIDEA [Superfamily]  (Land)  (FOSSIL)  - 7 Sp, 0 Var, 1 Img
  • GRANGERELLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ORTHALICOIDEA [Superfamily]  (Land)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • GRAPHOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-HILDOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 145 Sp, 0 Var, 117 Img
  • GREENLANDOCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-ORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • GROEBERELLIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-TRIGONIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • GROENLANDIBELIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-SPIRULIDA [Order]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 4 Img
  • GRYPHAEIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-OSTREIDA [Order]-OSTREOIDEA [Superfamily]  (Sea)  - 183 Sp, 9 Var, 76 Img
  • GRYPHOCHITONIDAE  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 1 Img
  • GRYPOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-TRIGONOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 65 Sp, 0 Var, 7 Img
  • GYMNITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-PINACOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 60 Sp, 0 Var, 2 Img
  • GYMNODORIDIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-POLYCEROIDEA [Superfamily]  (Sea)  - 31 Sp, 0 Var, 16 Img
  • GYMNOMENIIDAE  SOLENOGASTRES Taxon Tree: SOLENOGASTRES [Subclass]-PHOLIDOSKEPIA [Order]  (Sea)  - 8 Sp, 0 Var, 1 Img
  • GYRONITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-MEEKOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 23 Sp, 0 Var, 0 Img
  • GYROTROPIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-CALYPTRAEOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 1 Img
  • GZHELOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-TAINOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 28 Sp, 0 Var, 3 Img
  • HALIOTIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-HALIOTOIDEA [Superfamily]  (Sea)  - 67 Sp, 38 Var, 92 Img
  • HALKIERIIDAE  DIPLACOPHORA Taxon Tree: SACHITIDA [Order]-HALKIERIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 23 Sp, 0 Var, 4 Img
  • HALOBIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-OSTREIDA [Order]-POSIDONIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 40 Sp, 0 Var, 2 Img
  • HALOCERATIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-VANIKOROIDEA [Superfamily]  (Sea)  - 20 Sp, 0 Var, 3 Img
  • HALOLIMNOHELICIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-HYGROMIOIDEA [Superfamily]  (Land)  - 14 Sp, 2 Var, 0 Img
  • HALONYMPHIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-CUSPIDARIOIDEA [Superfamily]  (Sea)  - 13 Sp, 0 Var, 3 Img
  • HALORITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-TROPITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 43 Sp, 0 Var, 1 Img
  • HAMINOEIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-CEPHALASPIDEA [Order]-HAMINOEOIDEA [Superfamily]  (Sea)  - 191 Sp, 2 Var, 101 Img
  • HAMITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-TURRILITINA [Order]-TURRILITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 38 Sp, 2 Var, 14 Img
  • HAMMATOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-HILDOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 99 Sp, 1 Var, 39 Img
  • HAMULINIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-TURRILITINA [Order]-HAMULINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 21 Sp, 1 Var, 7 Img
  • HANCOCKIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-TRITONIOIDEA [Superfamily]  (Sea)  - 7 Sp, 0 Var, 3 Img
  • HANLEYIDAE  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]-LEPIDOPLEURIDA [Order]-LEPIDOPLEURINA [Suborder]  (Sea)  - 7 Sp, 0 Var, 1 Img
  • HAPLOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-HAPLOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 39 Sp, 2 Var, 25 Img
  • HAPLOTREMATIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-RHYTIDOIDEA [Superfamily]  (Land)  - 20 Sp, 0 Var, 8 Img
  • HARPAGODIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-STROMBOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 41 Sp, 0 Var, 28 Img
  • HARPIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-MURICOIDEA [Superfamily]  (Sea)  - 108 Sp, 9 Var, 86 Img
  • HASTITIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-BELEMNITIDA [Order]  (Sea)  (FOSSIL)  - 12 Sp, 0 Var, 6 Img
  • HEBETOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ASCOCERIDA [Order]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 0 Img
  • HEDENSTROEMIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-SAGECERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 21 Sp, 0 Var, 2 Img
  • HEDYLOPSIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-ACOCHLIDIACEA [Order]-ACOCHLIDIOIDEA [Superfamily]  (Sea)  - 2 Sp, 0 Var, 1 Img
  • HELCIONELLIDAE  HELCIONELLOIDA Taxon Tree: ARCHAEOBRANCHIA [Subclass]-HELCIONELLIFORMES [Order]-HELCIONELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 146 Sp, 1 Var, 32 Img
  • HELCIONELLOIDEA (unassigned)  HELCIONELLOIDA Taxon Tree: ARCHAEOBRANCHIA [Subclass]-HELCIONELLIFORMES [Order]-HELCIONELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 2 Img
  • HELICARIONIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-HELICARIONOIDEA [Superfamily]  (Land)  - 320 Sp, 20 Var, 85 Img
  • HELICIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-HELICOIDEA [Superfamily]  (Land)  - 568 Sp, 349 Var, 543 Img
  • HELICINIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-HELICINOIDEA [Superfamily]  (Land)  - 567 Sp, 123 Var, 278 Img
  • HELICODISCIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-PUNCTOIDEA [Superfamily]  (Land)  - 86 Sp, 0 Var, 18 Img
  • HELICODONTIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-HYGROMIOIDEA [Superfamily]  (Land)  - 33 Sp, 9 Var, 25 Img
  • HELICOSTOIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-RISSOOIDEA [Superfamily]  (Freshwater)  - 1 Sp, 0 Var, 0 Img
  • HELICOTOMIDAE  GASTROPODA Taxon Tree: EOGASTROPODA [Subclass]-EUOMPHALINA [Order]-EUOMPHALOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 57 Sp, 2 Var, 19 Img
  • HELMINTHOCHITONIDAE  POLYPLACOPHORA Taxon Tree: PALEOLORICATA [Subclass]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • HELMINTHOGLYPTIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-HELICOIDEA [Superfamily]  (Land)  - 216 Sp, 71 Var, 110 Img
  • HEMATITIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-HEMATITIDA [Order]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 1 Img
  • HEMIARTHRIDAE  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]-CHITONIDA [Order]-ACANTHOCHITONINA [Suborder]-CRYPTOPLACOIDEA [Superfamily]  (Sea)  - 5 Sp, 0 Var, 3 Img
  • HEMIDONACIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-HEMIDONACOIDEA [Superfamily]  (Sea)  - 7 Sp, 0 Var, 3 Img
  • HEMIHOPLITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ANCYLOCERATINA [Suborder]-ANCYLOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 50 Sp, 2 Var, 9 Img
  • HEMILECANITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-XENODISCOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • HEMIMENIIDAE  SOLENOGASTRES Taxon Tree: SOLENOGASTRES [Subclass]-NEOMENIAMORPHA [Order]  (Sea)  - 11 Sp, 0 Var, 1 Img
  • HEMIPHRAGMOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ONCOCERIDA [Order]  (Sea)  (FOSSIL)  - 21 Sp, 0 Var, 2 Img
  • HERACLITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-TRACHYCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • HERCOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ONCOCERIDA [Order]-RUTOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • HERCOGLOSSIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]  (Sea)  (FOSSIL)  - 114 Sp, 0 Var, 4 Img
  • HERCOLEPADIDAE  POLYPLACOPHORA Taxon Tree: MULTIPLACOPHORA [Subclass]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • HERMAEIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-SACOGLOSSA [Order]-PLAKOBRANCHACEA [Suborder]-LIMAPONTIOIDEA [Superfamily]  (Sea)  - 29 Sp, 0 Var, 17 Img
  • HEROIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]  (Sea)  - 5 Sp, 0 Var, 2 Img
  • HETEROBRANCHIA (unassigned)  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • HETEROCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ANCYLOCERATINA [Suborder]-ANCYLOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 76 Sp, 5 Var, 16 Img
  • HETEROHERPIIDAE  SOLENOGASTRES Taxon Tree: SOLENOGASTRES [Subclass]-STERROFUSTIA [Order]  (Sea)  - 2 Sp, 0 Var, 1 Img
  • HETERONERITIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PYRAMIDELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • HETEROPECTINIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-HETEROPECTINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 73 Sp, 0 Var, 5 Img
  • HETEROSTROPHA (unassigned)  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-HETEROSTROPHA [Infraclass]  (Sea)  (FOSSIL)  - 0 Sp, 0 Var, 0 Img
  • HETEROSUBULITIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-GLACIDORBOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 1 Img
  • HEXABRANCHIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-POLYCEROIDEA [Superfamily]  (Sea)  - 10 Sp, 0 Var, 2 Img
  • HIATELLIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-HIATELLIDA [Order]-HIATELLOIDEA [Superfamily]  (Sea)  - 116 Sp, 7 Var, 49 Img
  • HILDOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-HILDOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 306 Sp, 5 Var, 151 Img
  • HIMALAYITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-PERISPHINCTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 33 Sp, 0 Var, 6 Img
  • HIMANTOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ANCYLOCERATINA [Suborder]-ANCYLOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • HIPPOCARDIIDAE  ROSTROCONCHIA Taxon Tree: CONOCARDIIDA [Order]-HIPPOCARDIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 46 Sp, 2 Var, 20 Img
  • HIPPOCARDIOIDEA (unassigned)  ROSTROCONCHIA Taxon Tree: CONOCARDIIDA [Order]-HIPPOCARDIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 5 Img
  • HIPPONICIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-VANIKOROIDEA [Superfamily]  (Sea)  - 102 Sp, 3 Var, 72 Img
  • HIPPOPODIUMIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MODIOMORPHIDA [Order]-MODIOMORPHOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 3 Img
  • HIPPURITIDA (unassigned)  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-HIPPURITIDA [Order]  (Sea)  (FOSSIL)  - 13 Sp, 0 Var, 0 Img
  • HIPPURITIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-HIPPURITIDA [Order]-RADIOLITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 26 Sp, 0 Var, 5 Img
  • HISTIOTEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order]  (Sea)  - 16 Sp, 4 Var, 7 Img
  • HOLCOBELIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-BELEMNITIDA [Order]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 4 Img
  • HOLCODISCIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-PERISPHINCTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 16 Sp, 0 Var, 4 Img
  • HOLOPEIDAE  GASTROPODA Taxon Tree: EOGASTROPODA [Subclass]-EUOMPHALINA [Order]-EUOMPHALOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 111 Sp, 3 Var, 25 Img
  • HOMOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-GASTRIOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 33 Sp, 0 Var, 4 Img
  • HOMOCTENIDAE  TENTACULITA Taxon Tree: CHONIOCONARIDA [Subclass]-LIRIOCONARIDA [Superorder]-HOMOCTENIDA [Order]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 3 Img
  • HOPLITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-HOPLITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 177 Sp, 15 Var, 111 Img
  • HORAICLAVIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-CONOIDEA [Superfamily]  (Sea)  - 242 Sp, 12 Var, 127 Img
  • HUANANOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-XENODISCOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 0 Img
  • HUMBOLDTIANIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-HELICOIDEA [Superfamily]  (Land)  - 56 Sp, 1 Var, 6 Img
  • HUMEOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ENDOCERIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • HUNANOPECTINIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-HETEROPECTINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 0 Img
  • HUNGARITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-CERATITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 12 Sp, 2 Var, 0 Img
  • HURONIIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ACTINOCERIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 1 Img
  • HYALOGYRINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-HETEROSTROPHA [Infraclass]-VALVATOIDEA [Superfamily]  (Sea)  - 16 Sp, 0 Var, 12 Img
  • HYATTOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-MARATHONITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • HYDROBIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TRUNCATELLOIDEA [Superfamily]  (Freshwater)  - 2097 Sp, 113 Var, 460 Img
  • HYDROCENIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-HYDROCENOIDEA [Superfamily]  (Land)  - 72 Sp, 0 Var, 8 Img
  • HYDROCOCCIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TRUNCATELLOIDEA [Superfamily]  (Sea)  - 2 Sp, 0 Var, 1 Img
  • HYDROMYLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-GYMNOSOMATA [Order]-HYDROMYLOIDEA [Superfamily]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • HYGROMIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-HYGROMIOIDEA [Superfamily]  (Land)  - 783 Sp, 188 Var, 595 Img
  • HYGROPHILA (unassigned)  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-HYGROPHILA [Order]  (Freshwater)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • HYOLITHIDA (unassigned)  HYOLITHA Taxon Tree: HYOLITHIDA [Order]  (Sea)  (FOSSIL)  - 12 Sp, 0 Var, 0 Img
  • HYOLITHIDAE  HYOLITHA Taxon Tree: HYOLITHIDA [Order]  (Sea)  (FOSSIL)  - 41 Sp, 0 Var, 1 Img
  • HYPSELOCONIDAE  MONOPLACOPHORA Taxon Tree: HYPSELOCONIDA [Order]-HYPSELOCONOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 30 Sp, 0 Var, 2 Img
  • HYPSELOSTOMATIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-PUPILLOIDEA [Superfamily]  (Land)  - 99 Sp, 6 Var, 47 Img
  • HYRIIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-UNIONIDA [Order]-HYRIOIDEA [Superfamily]  (Freshwater)  - 89 Sp, 24 Var, 101 Img
  • ICANOTIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-TELLINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 14 Sp, 1 Var, 3 Img
  • ICHTHYOSARCOLITIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-HIPPURITIDA [Order]-CAPRINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 4 Img
  • IDIOSEPIIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-DECAPODIFORMES (unassigned) [Order]  (Sea)  - 11 Sp, 0 Var, 2 Img
  • IGARKIELLIDAE  HELCIONELLOIDA Taxon Tree: ARCHAEOBRANCHIA [Subclass]-HELCIONELLIFORMES [Order]-HELCIONELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • ILBIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-CEPHALASPIDEA [Order]-RUNCINOIDEA [Superfamily]  (Sea)  - 3 Sp, 0 Var, 2 Img
  • IMEROHERPIIDAE  SOLENOGASTRES Taxon Tree: SOLENOGASTRES [Subclass]-STERROFUSTIA [Order]  (Sea)  - 2 Sp, 0 Var, 0 Img
  • IMOGLOBIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-PERUNELOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 2 Img
  • INFLATICORNIDAE  HYOLITHA Taxon Tree: SULCAVITIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • INOCERAMIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-MYALINIDA [Order]-INOCERAMOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 171 Sp, 7 Var, 33 Img
  • INTEJOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-INTEJOCERIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • INTEJOCERIDA (unassigned)  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-INTEJOCERIDA [Order]  (Sea)  (FOSSIL)  - 0 Sp, 0 Var, 0 Img
  • INTIHUARELLIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-ACTINODONTIDA [Order]-ANODONTOPSOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • INTOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-PERICYCLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 10 Sp, 0 Var, 0 Img
  • INYOITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-NORITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 12 Sp, 0 Var, 2 Img
  • IOTRIGONIIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-MEGATRIGONIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 31 Sp, 0 Var, 0 Img
  • IRAVADIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TRUNCATELLOIDEA [Superfamily]  (Sea)  - 109 Sp, 0 Var, 36 Img
  • IRIDINIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-UNIONIDA [Order]-ETHERIOIDEA [Superfamily]  (Freshwater)  - 45 Sp, 0 Var, 42 Img
  • ISCHNOCHITONIDAE  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]-CHITONIDA [Order]-CHITONINA [Suborder]-CHITONOIDEA [Superfamily]  (Sea)  - 280 Sp, 15 Var, 114 Img
  • ISCHNOPTYGMATIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-SUBULITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • ISCHYRINIIDAE  ROSTROCONCHIA Taxon Tree: RIBEIRIOIDA [Order]-ISCHYRINIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 15 Sp, 1 Var, 8 Img
  • ISCHYRODONTIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-CYRTODONTIDA [Order]  (Sea)  (FOSSIL)  - 5 Sp, 1 Var, 0 Img
  • ISCULITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-PINACOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • ISOARCIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-NUCULANIDA [Order]-NUCULANOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • ISOCYPRINIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-VENEROIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • ISOLIMEIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-LIMIDA [Order]-LIMOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • ITIERIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-NERINEOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 11 Sp, 0 Var, 5 Img
  • JANTHINIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-EPITONIOIDEA [Superfamily]  (Sea)  - 18 Sp, 0 Var, 12 Img
  • JENSENERIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-SACOGLOSSA [Order]-PLAKOBRANCHACEA [Suborder]-PLAKOBRANCHOIDEA [Superfamily]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • JOANNITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-ARCESTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 0 Img
  • JOHNWYATTIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • JOUBINITEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • JOVELLANIIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ONCOCERIDA [Order]  (Sea)  (FOSSIL)  - 13 Sp, 0 Var, 0 Img
  • JULIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-SACOGLOSSA [Order]-OXYNOACEA [Suborder]-OXYNOOIDEA [Superfamily]  (Sea)  - 32 Sp, 1 Var, 17 Img
  • JURAPHYLLITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-PHYLLOCERATIDA [Order]-PHYLLOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 28 Sp, 0 Var, 5 Img
  • JUVAVITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-TROPITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 74 Sp, 0 Var, 0 Img
  • KALENTERIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-HIPPURITIDA [Order]-KALENTEROIDEA [Superfamily]  (Sea)  (FOSSIL)  - 97 Sp, 0 Var, 13 Img
  • KARAGANDOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-KARAGANDOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • KAROCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ONCOCERIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • KASHMIRITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-XENODISCOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 32 Sp, 0 Var, 0 Img
  • KELAENIDAE  CEPHALOPODA Taxon Tree: MESOTEUTHOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • KELLIELLIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-GLOSSOIDEA [Superfamily]  (Sea)  - 31 Sp, 0 Var, 12 Img
  • KELLIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-GALEOMMATOIDEA [Superfamily]  (Sea)  - 96 Sp, 3 Var, 30 Img
  • KHAIRKHANIIDAE  HELCIONELLOIDA Taxon Tree: DIVASIBRANCHIA [Subclass]-KHAIRKHANIIFORMES [Order]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 2 Img
  • KHVALYNITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-DINARITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 15 Sp, 0 Var, 0 Img
  • KIONOCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-ORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 20 Sp, 0 Var, 3 Img
  • KIRENGELLIDAE  MONOPLACOPHORA Taxon Tree: TRYBLIDIIDA [Order]-KIRINGELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 1 Img
  • KIRSOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-TORNOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 19 Sp, 0 Var, 2 Img
  • KITTLIDISCIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-PLEUROTOMARIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 1 Img
  • KLAMATHITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-PINACOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 0 Img
  • KNEMICERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ENGONOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 56 Sp, 0 Var, 1 Img
  • KNIGHTITIDAE  GASTROPODA Taxon Tree: AMPHIGASTROPODA [Subclass]-BELLEROPHONTIDA [Order]-BELLEROPHONTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 105 Sp, 1 Var, 4 Img
  • KOCHIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PTERIIDA [Order]-PTERIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 0 Img
  • KOENENITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-GEPHUROCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 22 Sp, 1 Var, 1 Img
  • KOLYMIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-MYALINIDA [Order]-INOCERAMOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 33 Sp, 0 Var, 0 Img
  • KONDURIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-SOLENIDA [Order]-ORTHONOTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • KONINCKIOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-TAINOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 46 Sp, 0 Var, 4 Img
  • KOSMOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-STEPHANOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 36 Sp, 1 Var, 22 Img
  • KOSMOCLYMENIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CLYMENIIDA [Order]-CLYMENIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 41 Sp, 3 Var, 6 Img
  • KOSSMATICERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-DESMOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 66 Sp, 1 Var, 8 Img
  • KUSKOKWIMIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-GLACIDORBOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • LABECERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ANCYLOCERATINA [Suborder]-ANCYLOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 53 Sp, 7 Var, 1 Img
  • LADAMAREKIIDAE  MOLLUSCA INCERTAE SEDIS  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 2 Img
  • LADINULIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • LAETMOTEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-OCTOPODA [Order]-INCIRRATA [Suborder]-OCTOPODOIDEA [Superfamily]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • LAEVIDENTALIIDAE  SCAPHOPODA Taxon Tree: DENTALIIDA [Order]  (Sea)  - 27 Sp, 0 Var, 11 Img
  • LAEVITRIGONIIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-MYOPHORELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 2 Img
  • LAGINIOPSIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-GYMNOSOMATA [Order]-HYDROMYLOIDEA [Superfamily]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • LAHILLIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-CARDIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 1 Img
  • LAMBEOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • LAMELLIPHORIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-XENOPHOROIDEA [Superfamily]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 3 Img
  • LAMELLORTHOCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-ORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 1 Img
  • LAMELLOTIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PTERIIDA [Order]-PTERIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • LAMETILIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-NUCULIDA [Order]-NUCULANOIDEA [Superfamily]  (Sea)  - 3 Sp, 0 Var, 1 Img
  • LANASCALIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • LANCEDELLIIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-PLEUROTOMARIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • LANCEOLITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-NORITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 10 Sp, 0 Var, 1 Img
  • LAONIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-CEPHALASPIDEA [Order]-PHILINOIDEA [Superfamily]  (Sea)  - 4 Sp, 0 Var, 2 Img
  • LAROCHEIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-SCISSURELLOIDEA [Superfamily]  (Sea)  - 16 Sp, 0 Var, 9 Img
  • LASAEIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-GALEOMMATOIDEA [Superfamily]  (Sea)  - 248 Sp, 2 Var, 90 Img
  • LATANARCESTIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-AMIMAGONIATITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 1 Img
  • LATERNULIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-THRACIOIDEA [Superfamily]  (Sea)  - 47 Sp, 1 Var, 22 Img
  • LATIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-HYGROPHILA [Order]-CHILINOIDEA [Superfamily]  (Freshwater)  - 4 Sp, 0 Var, 2 Img
  • LAUBELLIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-SEGUENZIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 2 Img
  • LAUBIERINIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TONNOIDEA [Superfamily]  (Sea)  - 3 Sp, 1 Var, 4 Img
  • LAURIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ORCULOIDEA [Superfamily]  (Land)  - 74 Sp, 5 Var, 27 Img
  • LECANITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-DANUBITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 0 Img
  • LECHRITROCHOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-BARRANDEOCERIDA [Order]  (Sea)  (FOSSIL)  - 28 Sp, 0 Var, 6 Img
  • LEIOPECTINIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-LEIOPECTINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 21 Sp, 0 Var, 1 Img
  • LEOPOLDIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-PULCHELLIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • LEPETELLIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-LEPETELLOIDEA [Superfamily]  (Sea)  - 31 Sp, 0 Var, 21 Img
  • LEPETIDAE  GASTROPODA Taxon Tree: PATELLOGASTROPODA [Subclass]-LOTTIOIDEA [Superfamily]  (Sea)  - 27 Sp, 1 Var, 16 Img
  • LEPETODRILIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-LEPETODRILOIDEA [Superfamily]  (Sea)  - 23 Sp, 0 Var, 15 Img
  • LEPETOPSIDAE  GASTROPODA Taxon Tree: PATELLOGASTROPODA [Subclass]-LEPETOPSACEA [Superfamily]  (Sea)  (FOSSIL)  - 11 Sp, 0 Var, 0 Img
  • LEPIDOCHITONIDAE  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]-CHITONIDA [Order]-ACANTHOCHITONINA [Suborder]-MOPALIOIDEA [Superfamily]  (Sea)  - 60 Sp, 5 Var, 36 Img
  • LEPIDOMENIIDAE  SOLENOGASTRES Taxon Tree: SOLENOGASTRES [Subclass]-PHOLIDOSKEPIA [Order]  (Sea)  - 7 Sp, 0 Var, 1 Img
  • LEPIDOTEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • LEPTOCERATOIDIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ANCYLOCERATINA [Suborder]-ANCYLOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 40 Sp, 0 Var, 5 Img
  • LEPTOCHITONIDAE  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]-LEPIDOPLEURIDA [Order]-LEPIDOPLEURINA [Suborder]  (Sea)  - 182 Sp, 3 Var, 59 Img
  • LEPTOTHEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-LOLIGOSEPIIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • LESUEURILLIDAE  GASTROPODA Taxon Tree: EOGASTROPODA [Subclass]-EUOMPHALINA [Order]-EUOMPHALOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 34 Sp, 1 Var, 17 Img
  • LEVIATHANIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-LITTORINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 10 Sp, 0 Var, 0 Img
  • LEYMERIELLIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ACANTHOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 3 Img
  • LIAONINGIIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-UNIONIDA [Order]-UNIONOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • LIAREIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-ARCHITAENIOGLOSSA [Order]-CYCLOPHOROIDEA [Superfamily]  (Land)  - 55 Sp, 6 Var, 42 Img
  • LIMACIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-LIMACOIDEA [Superfamily]  (Land)  - 131 Sp, 2 Var, 53 Img
  • LIMACINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-THECOSOMATA [Order]-LIMACINOIDEA [Superfamily]  (Sea)  - 44 Sp, 4 Var, 16 Img
  • LIMAPONTIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-SACOGLOSSA [Order]-PLAKOBRANCHACEA [Suborder]-LIMAPONTIOIDEA [Superfamily]  (Sea)  - 67 Sp, 2 Var, 29 Img
  • LIMATULINIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-AVICULOPECTINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • LIMIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-LIMIDA [Order]-LIMOIDEA [Superfamily]  (Sea)  - 493 Sp, 8 Var, 160 Img
  • LIMIFOSSORIDAE  CAUDOFOVEATA Taxon Tree: CAUDOFOVEATA [Subclass]-CHAETODERMATIDA [Order]  (Sea)  - 15 Sp, 0 Var, 8 Img
  • LIMIPECTINIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-HETEROPECTINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 15 Sp, 0 Var, 2 Img
  • LIMOPSIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-ARCIDA [Order]-LIMOPSOIDEA [Superfamily]  (Sea)  - 167 Sp, 3 Var, 64 Img
  • LINEVITIDAE  HYOLITHA Taxon Tree: SULCAVITIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • LIOTEUTHIDIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-TEUTHIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • LIOTIIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-TROCHOIDEA [Superfamily]  (Sea)  - 174 Sp, 0 Var, 58 Img
  • LIPANELLIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • LIPAROCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-EODEROCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 48 Sp, 0 Var, 22 Img
  • LIROCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-CLYDONAUTILOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 70 Sp, 0 Var, 5 Img
  • LITHIOTIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-OSTREIDA [Order]-OSTREOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • LITHOGLYPHIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TRUNCATELLOIDEA [Superfamily]  (Freshwater)  - 174 Sp, 8 Var, 35 Img
  • LITIOPIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Sea)  - 60 Sp, 1 Var, 21 Img
  • LITTORINIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-LITTORINOIDEA [Superfamily]  (Sea)  - 300 Sp, 18 Var, 207 Img
  • LITUITIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-ORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 22 Sp, 0 Var, 7 Img
  • LIUCHENGOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-XENODISCOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • LOBITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-LOBITACEAE [Superfamily]  (Sea)  (FOSSIL)  - 32 Sp, 0 Var, 0 Img
  • LOLIGINIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-MYOPSIDA [Order]  (Sea)  - 59 Sp, 0 Var, 19 Img
  • LOLIGOSEPIIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-LOLIGOSEPIIDA [Order]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 3 Img
  • LOMANOTIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-TRITONIOIDEA [Superfamily]  (Sea)  - 7 Sp, 0 Var, 3 Img
  • LONGOBARDITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-DANUBITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 65 Sp, 0 Var, 2 Img
  • LOPHOSPIRIDAE  GASTROPODA Taxon Tree: ORTHOGASTROPODA [Subclass]-MURCHISONIINA [Order]-TROCHONEMATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 245 Sp, 2 Var, 28 Img
  • LORICIDAE  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]-CHITONIDA [Order]-CHITONINA [Suborder]-CHITONOIDEA [Superfamily]  (Sea)  - 13 Sp, 1 Var, 5 Img
  • LOTTIIDAE  GASTROPODA Taxon Tree: PATELLOGASTROPODA [Subclass]-LOTTIOIDEA [Superfamily]  (Sea)  - 209 Sp, 20 Var, 168 Img
  • LOWOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-DISCOSORIDA [Order]  (Sea)  (FOSSIL)  - 15 Sp, 0 Var, 3 Img
  • LOXONEMATIDAE  GASTROPODA Taxon Tree: ORTHOGASTROPODA [Subclass]-MURCHISONIINA [Order]-LOXONEMATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 196 Sp, 3 Var, 26 Img
  • LUCIELLIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-EOTOMARIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 28 Sp, 1 Var, 5 Img
  • LUCINIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-LUCINIDA [Order]-LUCINOIDEA [Superfamily]  (Sea)  - 898 Sp, 20 Var, 388 Img
  • LUNULACARDIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-MYALINIDA [Order]-AMBONYCHIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 0 Img
  • LUNULICARDIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PTERIIDA [Order]-PTERIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 3 Img
  • LUTETIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-GLOSSOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 7 Sp, 2 Var, 3 Img
  • LYCOTEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order]  (Sea)  - 6 Sp, 0 Var, 4 Img
  • LYELLICERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ACANTHOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 47 Sp, 1 Var, 10 Img
  • LYMNAEIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-HYGROPHILA [Order]-LYMNAEOIDEA [Superfamily]  (Freshwater)  - 439 Sp, 57 Var, 96 Img
  • LYOCYCLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]  (Sea)  - 6 Sp, 0 Var, 0 Img
  • LYONSIELLIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-VERTICORDIOIDEA [Superfamily]  (Sea)  - 27 Sp, 0 Var, 12 Img
  • LYONSIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-PANDOROIDEA [Superfamily]  (Sea)  - 47 Sp, 3 Var, 24 Img
  • LYRODESMATIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-LYRODESMATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 13 Sp, 0 Var, 4 Img
  • LYTOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-LYTOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 127 Sp, 0 Var, 32 Img
  • MACELLOMENIIDAE  SOLENOGASTRES Taxon Tree: SOLENOGASTRES [Subclass]-PHOLIDOSKEPIA [Order]  (Sea)  - 5 Sp, 0 Var, 0 Img
  • MACLURITIDAE  GASTROPODA Taxon Tree: EOGASTROPODA [Subclass]-EUOMPHALINA [Order]-MACLURITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 73 Sp, 3 Var, 17 Img
  • MACROCEPHALITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-STEPHANOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 16 Sp, 1 Var, 17 Img
  • MACROCYCLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ACAVOIDEA [Superfamily]  (Land)  - 2 Sp, 0 Var, 2 Img
  • MACROSCAPHITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-TURRILITINA [Order]-PTYCHOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 41 Sp, 5 Var, 12 Img
  • MACTRIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-MACTROIDEA [Superfamily]  (Sea)  - 404 Sp, 22 Var, 232 Img
  • MACTROMYIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-LUCINIDA [Order]-LUCINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 28 Sp, 0 Var, 8 Img
  • MADRELLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]  (Sea)  - 6 Sp, 0 Var, 6 Img
  • MAENIOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-PHARCICERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 2 Img
  • MAGNAPINNIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order]  (Sea)  - 3 Sp, 0 Var, 2 Img
  • MAIKHANELLIDAE  MONOPLACOPHORA  (Sea)  (FOSSIL)  - 19 Sp, 0 Var, 4 Img
  • MAIZANIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-ARCHITAENIOGLOSSA [Order]-CYCLOPHOROIDEA [Superfamily]  (Land)  - 7 Sp, 1 Var, 2 Img
  • MAKARENKOPLACIDAE  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]-CHITONIDA [Order]-ACANTHOCHITONINA [Suborder]-CRYPTOPLACOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • MALLEIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PTERIIDA [Order]-PTERIOIDEA [Superfamily]  (Sea)  - 37 Sp, 0 Var, 9 Img
  • MALLETIIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-NUCULANIDA [Order]-NUCULANOIDEA [Superfamily]  (Sea)  - 204 Sp, 4 Var, 45 Img
  • MANCHUROCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ENDOCERIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 1 Img
  • MANDALOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-DISCOSORIDA [Order]  (Sea)  (FOSSIL)  - 75 Sp, 0 Var, 17 Img
  • MANDELIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-PHYLLIDIOIDEA [Superfamily]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • MANGELIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-CONOIDEA [Superfamily]  (Sea)  - 1099 Sp, 90 Var, 527 Img
  • MANINGRIDIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-HYGROPHILA [Order]-AMPHIBOLOIDEA [Superfamily]  (Sea)  - 1 Sp, 0 Var, 0 Img
  • MANTICULIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-EURYDESMATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • MANZANELLIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-SOLEMYIDA [Order]-MANZANELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • MAORAXIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • MARATHONITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-MARATHONITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 39 Sp, 0 Var, 0 Img
  • MARGARITARIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-PHOLADOMYOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • MARGARITIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-TROCHOIDEA [Superfamily]  (Sea)  - 100 Sp, 9 Var, 48 Img
  • MARGARITIFERIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-UNIONIDA [Order]-UNIONOIDEA [Superfamily]  (Freshwater)  - 21 Sp, 0 Var, 14 Img
  • MARGINELLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-MURICOIDEA [Superfamily]  (Sea)  - 1347 Sp, 32 Var, 822 Img
  • MAROCELLIDAE  HELCIONELLOIDA Taxon Tree: ARCHAEOBRANCHIA [Subclass]-HELCIONELLIFORMES [Order]-HELCIONELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 1 Img
  • MASTIGOPHORIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-LOLIGOSEPIIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • MASTIGOTEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order]  (Sea)  - 21 Sp, 0 Var, 2 Img
  • MATHERIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-LIMIDA [Order]-LIMOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • MATHILDIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-MATHILDOIDEA [Superfamily]  (Sea)  - 207 Sp, 2 Var, 90 Img
  • MATTHEVIIDAE  POLYPLACOPHORA Taxon Tree: PALEOLORICATA [Subclass]  (Sea)  (FOSSIL)  - 20 Sp, 0 Var, 2 Img
  • MAXIGONIATITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-PERICYCLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 26 Sp, 0 Var, 12 Img
  • MAXIMITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-PSEUDOHALORITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • MAYAITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-STEPHANOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 1 Img
  • MECYNODONTIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MEGALODONTIDA [Order]-MECYNODONTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • MEDLICOTTIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-PROLECANITIDA [Order]-MEDLICOTTIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 116 Sp, 0 Var, 3 Img
  • MEEKOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-MEEKOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 62 Sp, 0 Var, 1 Img
  • MEEKOSPIRIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]  (Sea)  (FOSSIL)  - 53 Sp, 0 Var, 9 Img
  • MEGACRIOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-TURRILITINA [Order]-PTYCHOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 15 Sp, 1 Var, 1 Img
  • MEGADESMIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-HIATELLIDA [Order]-EDMONDIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 43 Sp, 0 Var, 1 Img
  • MEGALELEDONIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-OCTOPODA [Order]-INCIRRATA [Suborder]-OCTOPODOIDEA [Superfamily]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • MEGALOBULIMIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-STROPHOCHEILOIDEA [Superfamily]  (Land)  - 65 Sp, 16 Var, 64 Img
  • MEGALODONTIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MEGALODONTIDA [Order]-MEGALODONTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 1 Img
  • MEGALOMASTOMIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-ARCHITAENIOGLOSSA [Order]-CYCLOPHOROIDEA [Superfamily]  (Land)  - 68 Sp, 73 Var, 49 Img
  • MEGAPHYLLITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-MEGAPHYLLITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 16 Sp, 0 Var, 1 Img
  • MEGASPIRIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ORTHALICOIDEA [Superfamily]  (Land)  - 79 Sp, 11 Var, 33 Img
  • MEGATEUTHIDIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-BELEMNITIDA [Order]  (Sea)  (FOSSIL)  - 27 Sp, 0 Var, 15 Img
  • MEGATRIGONIIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-MEGATRIGONIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 35 Sp, 0 Var, 12 Img
  • MEGOMPHICIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ACAVOIDEA [Superfamily]  (Land)  - 8 Sp, 1 Var, 4 Img
  • MEIOMENIIDAE  SOLENOGASTRES Taxon Tree: SOLENOGASTRES [Subclass]-PHOLIDOSKEPIA [Order]  (Sea)  - 4 Sp, 0 Var, 1 Img
  • MELAGATHICERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-MEEKOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 84 Sp, 0 Var, 3 Img
  • MELANODRYMIIDAE  GASTROPODA Taxon Tree: NEOMPHALINA [Subclass]-NEOMPHALOIDEA [Superfamily]  (Sea)  - 18 Sp, 0 Var, 13 Img
  • MELANOPSIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Freshwater)  - 631 Sp, 199 Var, 167 Img
  • MELONGENIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-BUCCINOIDEA [Superfamily]  (Sea)  - 116 Sp, 16 Var, 73 Img
  • MESOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-DISCOSORIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • MESOCOCHLIOPIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-RISSOOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • MESODESMATIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-MACTROIDEA [Superfamily]  (Sea)  - 48 Sp, 1 Var, 30 Img
  • MESOHIBOLITHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-BELEMNITIDA [Order]  (Sea)  (FOSSIL)  - 60 Sp, 1 Var, 55 Img
  • METACERITHIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 11 Sp, 0 Var, 7 Img
  • METALEGOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-NEOICOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 53 Sp, 1 Var, 2 Img
  • METASIBIRITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-CLYDONITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 15 Sp, 0 Var, 0 Img
  • METOPTOMATIDAE  MONOPLACOPHORA Taxon Tree: ARCHINACELLIDA [Order]-ARCHINACELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 26 Sp, 0 Var, 1 Img
  • MICHELINOCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-ORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 25 Sp, 0 Var, 5 Img
  • MICRACTAEONIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ACHATINOIDEA [Superfamily]  (Land)  - 1 Sp, 0 Var, 1 Img
  • MICRODOMATIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-TROCHOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 50 Sp, 0 Var, 1 Img
  • MILACIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-PARMACELLOIDEA [Superfamily]  (Land)  - 56 Sp, 0 Var, 14 Img
  • MIMAGONIATITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-AMIMAGONIATITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 16 Sp, 0 Var, 3 Img
  • MIMOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-AMIMOSPHINCTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 11 Sp, 0 Var, 5 Img
  • MIMOSPHINCTIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-AMIMOSPHINCTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 49 Sp, 0 Var, 7 Img
  • MISURINELLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-MATHILDOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 2 Img
  • MITRIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-MURICOIDEA [Superfamily]  (Sea)  - 490 Sp, 46 Var, 463 Img
  • MITROMORPHIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-CONOIDEA [Superfamily]  (Sea)  - 175 Sp, 7 Var, 95 Img
  • MNESTIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-CEPHALASPIDEA [Order]-DIAPHANOIDEA [Superfamily]  (Sea)  - 9 Sp, 0 Var, 4 Img
  • MODIOLOPSIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-MYTILIDA [Order]-MODIOLOPSOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 11 Sp, 0 Var, 0 Img
  • MODIOMORPHIDA (unassigned)  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MODIOMORPHIDA [Order]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 0 Img
  • MODIOMORPHIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MODIOMORPHIDA [Order]-MODIOMORPHOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 189 Sp, 4 Var, 53 Img
  • MODULIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Sea)  - 35 Sp, 2 Var, 23 Img
  • MOITESSIERIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TRUNCATELLOIDEA [Superfamily]  (Freshwater)  - 110 Sp, 7 Var, 24 Img
  • MOLLUSCA INCERTAE SEDIS  MOLLUSCA INCERTAE SEDIS  (Sea)  (FOSSIL)  - 142 Sp, 0 Var, 91 Img
  • MONADENIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-HELICOIDEA [Superfamily]  (Land)  - 16 Sp, 5 Var, 7 Img
  • MONGOLOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-POPANOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • MONOPLACOPHORA INCERTAE SEDIS  MONOPLACOPHORA  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • MONOPLEURIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-HIPPURITIDA [Order]-RADIOLITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 18 Sp, 0 Var, 5 Img
  • MONOPTERIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-MYALINIDA [Order]-AMBONYCHIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 2 Img
  • MONOTIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-BUCHIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 35 Sp, 0 Var, 1 Img
  • MONTACUTIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-GALEOMMATOIDEA [Superfamily]  (Sea)  - 200 Sp, 2 Var, 59 Img
  • MONTANARIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-ACTINODONTIDA [Order]-AMNIGENIOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • MOPALIIDAE  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]-CHITONIDA [Order]-ACANTHOCHITONINA [Suborder]-MOPALIOIDEA [Superfamily]  (Sea)  - 97 Sp, 21 Var, 53 Img
  • MORPHOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-PERISPHINCTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 18 Sp, 0 Var, 13 Img
  • MOSQUOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-TAINOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • MUENSTERELLIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-VAMPYROMORPHA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • MUENSTEROCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-PERICYCLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 34 Sp, 0 Var, 10 Img
  • MULLERICERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-MEEKOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • MULTIANNULATOCYCLITIDAE  TENTACULITA Taxon Tree: CHONIOCONARIDA [Subclass]-TROMPETOCONARIDA [Superorder]-VOLYNITIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • MULTICONIDAE  TENTACULITA Taxon Tree: TENTACULITIDA [Order]  (Sea)  (FOSSIL)  - 0 Sp, 0 Var, 0 Img
  • MULTIFARIIDAE  MONOPLACOPHORA Taxon Tree: CYRTONELLIDA [Order]-CYRTONELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • MUNIERICERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-DESMOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 22 Sp, 0 Var, 9 Img
  • MURCHISONELLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-MURCHISONELLOIDEA [Superfamily]  (Sea)  - 87 Sp, 0 Var, 25 Img
  • MURCHISONIIDAE  GASTROPODA Taxon Tree: ORTHOGASTROPODA [Subclass]-MURCHISONIINA [Order]-MURCHISONIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 366 Sp, 11 Var, 42 Img
  • MURCHISONIOIDEA (unassigned)  GASTROPODA Taxon Tree: ORTHOGASTROPODA [Subclass]-MURCHISONIINA [Order]-MURCHISONIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • MURICIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-MURICOIDEA [Superfamily]  (Sea)  - 2639 Sp, 157 Var, 2085 Img
  • MYALINIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-MYALINIDA [Order]-AMBONYCHIOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 111 Sp, 0 Var, 30 Img
  • MYCETOPODIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-UNIONIDA [Order]-ETHERIOIDEA [Superfamily]  (Freshwater)  - 47 Sp, 31 Var, 74 Img
  • MYIDA (unassigned)  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MYIDA [Order]  (Sea)  (FOSSIL)  - 11 Sp, 0 Var, 3 Img
  • MYIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MYIDA [Order]-MYOIDEA [Superfamily]  (Sea)  - 102 Sp, 3 Var, 35 Img
  • MYOCHAMIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-MYOCHAMOIDEA [Superfamily]  (Sea)  - 47 Sp, 2 Var, 18 Img
  • MYODAKRYOTIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-MYALINIDA [Order]-PROKOPIEVSKIOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 3 Sp, 0 Var, 1 Img
  • MYOPHORELLIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-MYOPHORELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 144 Sp, 2 Var, 7 Img
  • MYOPHORICARDIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-CARDITIDA [Order]-CRASSATELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 20 Sp, 0 Var, 3 Img
  • MYOPHORIIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-TRIGONIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 75 Sp, 0 Var, 2 Img
  • MYSIDIELLIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-MYALINIDA [Order]-AMBONYCHIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 0 Img
  • MYSTERIOCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-ORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • MYTILIDA (unassigned)  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-MYTILIDA [Order]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 0 Img
  • MYTILIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-MYTILIDA [Order]-MYTILOIDEA [Superfamily]  (Sea)  - 857 Sp, 36 Var, 378 Img
  • NACELLIDAE  GASTROPODA Taxon Tree: PATELLOGASTROPODA [Subclass]-LOTTIOIDEA [Superfamily]  (Sea)  - 77 Sp, 20 Var, 62 Img
  • NAEFITEUTHIDIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-BOLETZKYIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • NAIADITIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-MYALINIDA [Order]-PROKOPIEVSKIOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 21 Sp, 0 Var, 18 Img
  • NAKAMURANAIADIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-TRIGONIOIDOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 21 Sp, 0 Var, 1 Img
  • NANNITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-DANUBITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • NANNOLYTOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-LYTOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 3 Img
  • NARICOPSINIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-ARCHITAENIOGLOSSA [Order]-AMPULLARIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 4 Img
  • NARTHECOCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-ORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • NASSARIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-BUCCINOIDEA [Superfamily]  (Sea)  - 1022 Sp, 58 Var, 807 Img
  • NATALISSIMIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-PTERINOPECTINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • NATHORSTITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-NATHORSTITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 15 Sp, 0 Var, 0 Img
  • NATICIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-NATICOIDEA [Superfamily]  (Sea)  - 918 Sp, 40 Var, 578 Img
  • NATICOPSIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-NERITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 46 Sp, 1 Var, 6 Img
  • NAUTILIDA (unassigned)  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]  (Sea)  (FOSSIL)  - 10 Sp, 0 Var, 1 Img
  • NAUTILIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]  (Sea)  - 144 Sp, 3 Var, 21 Img
  • NECROTEUTHIDIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-LOLIGOSEPIIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • NEILONELLIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-NUCULANIDA [Order]-NUCULANOIDEA [Superfamily]  (Sea)  - 52 Sp, 1 Var, 23 Img
  • NEITHEIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-PECTINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 0 Img
  • NELEGEROCORNIDAE  HYOLITHA Taxon Tree: HYOLITHIDA [Order]  (Sea)  (FOSSIL)  - 13 Sp, 0 Var, 1 Img
  • NEOCOMITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-PERISPHINCTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 175 Sp, 0 Var, 42 Img
  • NEOCYCLOTIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-ARCHITAENIOGLOSSA [Order]-CYCLOPHOROIDEA [Superfamily]  (Land)  - 210 Sp, 21 Var, 100 Img
  • NEODIMORPHOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-NEODIMORPHOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 2 Img
  • NEOGASTROPODA (unassigned)  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]  (Sea)  (FOSSIL)  - 23 Sp, 0 Var, 9 Img
  • NEOGLYPHIOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-NEOGLYPHIOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 28 Sp, 0 Var, 2 Img
  • NEOICOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-NEOICOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 17 Sp, 0 Var, 1 Img
  • NEOLEPETOPSIDAE  GASTROPODA Taxon Tree: PATELLOGASTROPODA [Subclass]-LEPETOPSACEA [Superfamily]  (Sea)  - 13 Sp, 0 Var, 4 Img
  • NEOLEPTONIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-VENEROIDEA [Superfamily]  (Sea)  - 62 Sp, 0 Var, 13 Img
  • NEOLORICATA  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]  (Sea)  (FOSSIL)  - 0 Sp, 0 Var, 0 Img
  • NEOLORICATA (unassigned)  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]  (Sea)  (FOSSIL)  - 0 Sp, 0 Var, 0 Img
  • NEOMENIIDAE  SOLENOGASTRES Taxon Tree: SOLENOGASTRES [Subclass]-NEOMENIAMORPHA [Order]  (Sea)  - 19 Sp, 0 Var, 7 Img
  • NEOMIODONTIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-SPHAERIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 3 Img
  • NEOMPHALIDAE  GASTROPODA Taxon Tree: NEOMPHALINA [Subclass]-NEOMPHALOIDEA [Superfamily]  (Sea)  - 14 Sp, 0 Var, 9 Img
  • NEOPHYLLOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-PHYLLOCERATIDA [Order]-PHYLLOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 14 Sp, 0 Var, 3 Img
  • NEOPILINIDAE  MONOPLACOPHORA Taxon Tree: TRYBLIDIIDA [Order]  (Sea)  - 31 Sp, 0 Var, 12 Img
  • NEOSTACHEOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-CYCLOLOBOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 47 Sp, 0 Var, 1 Img
  • NEOTEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order]  (Sea)  - 4 Sp, 0 Var, 3 Img
  • NEPHRITICERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-BARRANDEOCERIDA [Order]  (Sea)  (FOSSIL)  - 15 Sp, 0 Var, 4 Img
  • NEPTUNOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-RUTOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • NERIDOMIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-NERITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 11 Sp, 0 Var, 4 Img
  • NERINEIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-NERINEOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 56 Sp, 2 Var, 48 Img
  • NERINELLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-NERINEOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 16 Sp, 0 Var, 3 Img
  • NERITARIIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-NERITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 33 Sp, 0 Var, 6 Img
  • NERITIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-NERITOIDEA [Superfamily]  (Sea)  - 639 Sp, 85 Var, 379 Img
  • NERITILIIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-HELICINOIDEA [Superfamily]  (Sea)  - 31 Sp, 0 Var, 10 Img
  • NERITOPSIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-NERITOPSOIDEA [Superfamily]  (Sea)  - 86 Sp, 2 Var, 19 Img
  • NERRHENIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-NERRHENOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • NEWTONIELLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-TRIPHOROIDEA [Superfamily]  (Sea)  - 191 Sp, 1 Var, 68 Img
  • NIERSTRASZELLIDAE  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]-LEPIDOPLEURIDA [Order]-LEPIDOPLEURINA [Suborder]  (Sea)  - 2 Sp, 0 Var, 2 Img
  • NIPPONONAIIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-TRIGONIOIDOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 9 Sp, 0 Var, 1 Img
  • NIPPONOTEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-BELEMNITIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • NODODELPHINULIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-TROCHOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 14 Sp, 1 Var, 8 Img
  • NOETIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-ARCIDA [Order]-ARCOIDEA [Superfamily]  (Sea)  - 121 Sp, 5 Var, 59 Img
  • NOMISMOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-NOMISMOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • NORDICERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-BELOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • NORDOPHICERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-PHYLLOCERATIDA [Order]-USSURITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 0 Img
  • NORIDISCITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-TRACHYCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • NORITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-NORITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • NOSTOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-TURRILITINA [Order]-TURRILITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 92 Sp, 2 Var, 16 Img
  • NOTABILITIDAE  HYOLITHA Taxon Tree: HYOLITHIDA [Order]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • NOTAEOLIDIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-FLABELLINOIDEA [Superfamily]  (Sea)  - 3 Sp, 0 Var, 3 Img
  • NOTHOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ONCOCERIDA [Order]  (Sea)  (FOSSIL)  - 25 Sp, 0 Var, 3 Img
  • NOTOBRANCHAEIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-GYMNOSOMATA [Order]-CLIONOIDEA [Superfamily]  (Sea)  - 8 Sp, 1 Var, 9 Img
  • NOTODIAPHANIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-CEPHALASPIDEA [Order]-DIAPHANOIDEA [Superfamily]  (Sea)  - 3 Sp, 0 Var, 1 Img
  • NOTOMENIIDAE  SOLENOGASTRES Taxon Tree: SOLENOGASTRES [Subclass]-CAVIBELONIA [Order]  (Sea)  - 1 Sp, 0 Var, 0 Img
  • NOVITATIDAE  HYOLITHA Taxon Tree: ORTHOTHECIDA [Order]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 0 Img
  • NOWAKIIDAE  TENTACULITA Taxon Tree: DACRYOCONARIDA [Subclass]-NOWAKIIDA [Order]  (Sea)  (FOSSIL)  - 12 Sp, 0 Var, 3 Img
  • NUCINELLIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-SOLEMYIDA [Order]-MANZANELLOIDEA [Superfamily]  (Sea)  - 37 Sp, 0 Var, 10 Img
  • NUCULANIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-NUCULANIDA [Order]-NUCULANOIDEA [Superfamily]  (Sea)  - 603 Sp, 9 Var, 151 Img
  • NUCULARCIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-AFGHANODESMATIDA [Order]-TIRONUCULOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 0 Img
  • NUCULIDA (unassigned)  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-NUCULIDA [Order]  (Sea)  - 16 Sp, 0 Var, 4 Img
  • NUCULIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-NUCULIDA [Order]-NUCULOIDEA [Superfamily]  (Sea)  - 478 Sp, 10 Var, 143 Img
  • NUDIBRANCHIA (unassigned)  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-DEXIARCHIA [Suborder]  (Sea)  - 0 Sp, 0 Var, 0 Img
  • NYASSIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-ACTINODONTIDA [Order]-NYASSOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 2 Img
  • NYSTIELLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-EPITONIOIDEA [Superfamily]  (Sea)  - 50 Sp, 0 Var, 26 Img
  • OCHMAZOCHITONIDAE  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • OCTOPODA (unassigned)  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-OCTOPODA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • OCTOPODIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-OCTOPODA [Order]-INCIRRATA [Suborder]-OCTOPODOIDEA [Superfamily]  (Sea)  - 268 Sp, 5 Var, 49 Img
  • OCTOPOTEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order]  (Sea)  - 9 Sp, 0 Var, 2 Img
  • OCYTHOIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-OCTOPODA [Order]-INCIRRATA [Suborder]-ARGONAUTOIDEA [Superfamily]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • ODONTOSTOMIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ORTHALICOIDEA [Superfamily]  (Land)  - 136 Sp, 15 Var, 119 Img
  • OECOPTYCHIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-STEPHANOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 2 Img
  • OFFLEYOCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-DISSIDOCERIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • OKADAIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-POLYCEROIDEA [Superfamily]  (Sea)  - 6 Sp, 0 Var, 2 Img
  • OLCOSTEPHANIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-PERISPHINCTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 65 Sp, 1 Var, 13 Img
  • OLEACINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-TESTACELLOIDEA [Superfamily]  (Land)  - 126 Sp, 13 Var, 64 Img
  • OLIVELLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-OLIVOIDEA [Superfamily]  (Sea)  - 184 Sp, 4 Var, 145 Img
  • OLIVIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-OLIVOIDEA [Superfamily]  (Sea)  - 289 Sp, 180 Var, 393 Img
  • OMALOGYRIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OMALOGYROIDEA [Superfamily]  (Sea)  - 55 Sp, 4 Var, 37 Img
  • OMMASTREPHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order]  (Sea)  - 22 Sp, 2 Var, 18 Img
  • OMNIGLYPTIDAE  SCAPHOPODA Taxon Tree: DENTALIIDA [Order]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • OMPHALOCIRRIDAE  GASTROPODA Taxon Tree: EOGASTROPODA [Subclass]-EUOMPHALINA [Order]-EUOMPHALOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 14 Sp, 0 Var, 0 Img
  • OMPHALOTROCHIDAE  GASTROPODA Taxon Tree: EOGASTROPODA [Subclass]-EUOMPHALINA [Order]-EUOMPHALOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 55 Sp, 0 Var, 2 Img
  • ONCHIDIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-SYSTELLOMMATOPHORA [Order]-ONCHIDIOIDEA [Superfamily]  (Sea)  - 107 Sp, 1 Var, 8 Img
  • ONCHIDORIDIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-ONCHIDORIDOIDEA [Superfamily]  (Sea)  - 68 Sp, 0 Var, 27 Img
  • ONCOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ONCOCERIDA [Order]  (Sea)  (FOSSIL)  - 73 Sp, 0 Var, 14 Img
  • ONCOCERIDA (unassigned)  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ONCOCERIDA [Order]  (Sea)  (FOSSIL)  - 55 Sp, 0 Var, 15 Img
  • ONYCHOCHILIDAE  MOLLUSCA INCERTAE SEDIS Taxon Tree: MIMOSPIRIDA [Order]-CLISOSPIROIDEA [Superfamily]  (Sea)  (FOSSIL)  - 36 Sp, 0 Var, 7 Img
  • ONYCHOTEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order]  (Sea)  - 48 Sp, 0 Var, 9 Img
  • OONOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ONCOCERIDA [Order]  (Sea)  (FOSSIL)  - 8 Sp, 1 Var, 2 Img
  • OOPELTIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ARIONOIDEA [Superfamily]  (Land)  - 4 Sp, 0 Var, 2 Img
  • OOSTERELLIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-PERISPHINCTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 2 Img
  • OPHICERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-MEEKOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 19 Sp, 0 Var, 0 Img
  • OPHIDIOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-TARPHYCERIDA [Order]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 1 Img
  • OPHILETIDAE  GASTROPODA Taxon Tree: EOGASTROPODA [Subclass]-EUOMPHALINA [Order]-OPHILETOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 80 Sp, 0 Var, 21 Img
  • OPISTHOBRANCHIA (unassigned)  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]  (Sea)  (FOSSIL)  - 10 Sp, 0 Var, 6 Img
  • OPISTHONEMATIDAE  GASTROPODA Taxon Tree: EOGASTROPODA [Subclass]-EUOMPHALINA [Order]-OPHILETOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • OPISTHOTEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-OCTOPODA [Order]-CIRRATA [Suborder]  (Sea)  - 38 Sp, 0 Var, 5 Img
  • OPPELIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-HAPLOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 207 Sp, 2 Var, 94 Img
  • ORBITESTELLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-HETEROSTROPHA [Infraclass]  (Sea)  - 32 Sp, 0 Var, 10 Img
  • ORCULIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ORCULOIDEA [Superfamily]  (Land)  - 71 Sp, 33 Var, 49 Img
  • OREOHELICIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-PUNCTOIDEA [Superfamily]  (Land)  - 53 Sp, 21 Var, 22 Img
  • ORIOCRASSATELLIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-ACTINODONTIDA [Order]-ORIOCRASSATELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 12 Sp, 0 Var, 1 Img
  • ORIOSTOMATIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-ORIOSTOMATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 120 Sp, 1 Var, 3 Img
  • ORMOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ACTINOCERIDA [Order]  (Sea)  (FOSSIL)  - 24 Sp, 0 Var, 1 Img
  • ORNITHOPECTINIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-HETEROPECTINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • ORTHALICIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ORTHALICOIDEA [Superfamily]  (Land)  - 119 Sp, 137 Var, 187 Img
  • ORTHOCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-ORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 122 Sp, 1 Var, 37 Img
  • ORTHOCERIDA (unassigned)  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-ORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 17 Sp, 0 Var, 3 Img
  • ORTHONEMATIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-PALAEOSTYLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 40 Sp, 0 Var, 3 Img
  • ORTHONEMIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIMORPHA [Order]  (Sea)  (FOSSIL)  - 60 Sp, 0 Var, 4 Img
  • ORTHONOTIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-SOLENIDA [Order]-ORTHONOTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 12 Sp, 1 Var, 6 Img
  • ORTHONYCHIIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYRTONERITIMORPHA [Order]  (Sea)  (FOSSIL)  - 65 Sp, 0 Var, 4 Img
  • ORTHOTHECIDAE  HYOLITHA Taxon Tree: ORTHOTHECIDA [Order]  (Sea)  (FOSSIL)  - 12 Sp, 0 Var, 0 Img
  • ORTHROZANCLIDAE  DIPLACOPHORA Taxon Tree: SACHITIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • ORULGANITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-SCHISTOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • OSTEOPELTIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-LEPETELLOIDEA [Superfamily]  (Sea)  - 3 Sp, 0 Var, 2 Img
  • OSTREIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-OSTREIDA [Order]-OSTREOIDEA [Superfamily]  (Sea)  - 386 Sp, 24 Var, 149 Img
  • OTINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-EUPULMONATA [Order]-ELLOBIOIDEA [Superfamily]  (Freshwater)  - 1 Sp, 0 Var, 1 Img
  • OTOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-OTOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 0 Img
  • OTOITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-STEPHANOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 58 Sp, 1 Var, 32 Img
  • OVATOCONCHIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-SOLEMYIDA [Order]-SOLEMYOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • OVULIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-CYPRAEOIDEA [Superfamily]  (Sea)  - 315 Sp, 10 Var, 260 Img
  • OXYCHILIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-GASTRODONTOIDEA [Superfamily]  (Land)  - 190 Sp, 21 Var, 75 Img
  • OXYNOIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-SACOGLOSSA [Order]-OXYNOACEA [Suborder]-OXYNOOIDEA [Superfamily]  (Sea)  - 18 Sp, 0 Var, 9 Img
  • OXYNOTICERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-PSILOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 42 Sp, 0 Var, 16 Img
  • OXYTEUTHIDIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-BELEMNITIDA [Order]  (Sea)  (FOSSIL)  - 10 Sp, 0 Var, 1 Img
  • OXYTOMIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-OXYTOMOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 34 Sp, 0 Var, 3 Img
  • PACHYCARDIIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-UNIONIDA [Order]  (Freshwater)  (FOSSIL)  - 19 Sp, 0 Var, 0 Img
  • PACHYCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-STEPHANOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 17 Sp, 0 Var, 6 Img
  • PACHYCHILIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Freshwater)  - 269 Sp, 31 Var, 130 Img
  • PACHYCLYMENIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CLYMENIIDA [Order]-BILOCLYMENIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 10 Sp, 0 Var, 1 Img
  • PACHYDISCIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-DESMOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 54 Sp, 0 Var, 8 Img
  • PACHYDOMIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-HIATELLIDA [Order]-EDMONDIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 1 Img
  • PACHYRISMATIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MEGALODONTIDA [Order]-MEGALODONTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 19 Sp, 0 Var, 1 Img
  • PADUNOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-INTEJOCERIDA [Order]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • PAGODATROCHIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-SEGUENZIOIDEA [Superfamily]  (Sea)  - 3 Sp, 0 Var, 1 Img
  • PALADMETIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-CANCELLARIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • PALAEACMAEIDAE  MONOPLACOPHORA  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 1 Img
  • PALAEANODONTIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-PALAEANODONTOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 24 Sp, 0 Var, 9 Img
  • PALAEOBELEMNOPSIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-AULACOCERIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • PALAEOCARDITIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-CARDIIDA [Order]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 1 Img
  • PALAEOCTOPODIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-OCTOPODA [Order]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 2 Img
  • PALAEOLOLIGINIDAE  CEPHALOPODA Taxon Tree: MESOTEUTHOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 4 Img
  • PALAEOMUTELIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-ACTINODONTIDA [Order]-PALAEOMUTELOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 92 Sp, 0 Var, 1 Img
  • PALAEONARICIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-NERITOPSOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 2 Img
  • PALAEOPHARIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MODIOMORPHIDA [Order]-MODIOMORPHOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 9 Sp, 1 Var, 0 Img
  • PALAEOPHYLLITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-PHYLLOCERATIDA [Order]-USSURITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 0 Img
  • PALAEORISSOINIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-RISSOOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • PALAEOSTOIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-CLAUSILIOIDEA [Superfamily]  (Land)  (FOSSIL)  - 3 Sp, 0 Var, 1 Img
  • PALAEOSTYLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-PALAEOSTYLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 34 Sp, 0 Var, 2 Img
  • PALAEOTROCHIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-PALAEOTROCHOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 11 Sp, 0 Var, 1 Img
  • PALAEOXESTINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-GASTRODONTOIDEA [Superfamily]  (Land)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • PALAEOZYGOPLEURIDAE  GASTROPODA Taxon Tree: ORTHOGASTROPODA [Subclass]-MURCHISONIINA [Order]-LOXONEMATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 98 Sp, 1 Var, 8 Img
  • PALEOLORICATA (unassigned)  POLYPLACOPHORA Taxon Tree: PALEOLORICATA [Subclass]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 0 Img
  • PALERMOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-ADRIANITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • PALUDOMIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Freshwater)  - 104 Sp, 12 Var, 38 Img
  • PANDORIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-PANDOROIDEA [Superfamily]  (Sea)  - 65 Sp, 3 Var, 45 Img
  • PAPILLODERMATIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-PAPILLODERMATOIDEA [Superfamily]  (Land)  - 1 Sp, 0 Var, 1 Img
  • PARABACTRITIDAE  CEPHALOPODA Taxon Tree: BACTRITOIDEA [Subclass]-BACTRITIDA [Order]  (Sea)  (FOSSIL)  - 11 Sp, 0 Var, 0 Img
  • PARACELTITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-XENODISCOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 23 Sp, 0 Var, 0 Img
  • PARACENOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-NAUTILITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 34 Sp, 0 Var, 1 Img
  • PARACYCLIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-LUCINIDA [Order]-LUCINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 7 Img
  • PARAGASTRIOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-NEOICOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 139 Sp, 0 Var, 2 Img
  • PARAGOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-DINARITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 12 Sp, 0 Var, 0 Img
  • PARAHOPLITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ANCYLOCERATINA [Suborder]-DOUVILLEICERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 33 Sp, 3 Var, 18 Img
  • PARAKORILITHIDAE  HYOLITHA Taxon Tree: SULCAVITIDA [Order]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • PARALLELODONTIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-ARCIDA [Order]-ARCOIDEA [Superfamily]  (Sea)  - 104 Sp, 1 Var, 22 Img
  • PARANOWAKIIDAE  TENTACULITA Taxon Tree: CHONIOCONARIDA [Subclass]-LIRIOCONARIDA [Superorder]-HOMOCTENIDA [Order]  (Sea)  (FOSSIL)  - 26 Sp, 4 Var, 0 Img
  • PARAPHRAGMITIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-DISSIDOCERIDA [Order]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 1 Img
  • PARAPOPANOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-MEGAPHYLLITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 36 Sp, 0 Var, 4 Img
  • PARASHUMARDITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-SHUMARDITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 0 Img
  • PARATHISBITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-TROPITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 0 Img
  • PARATURBINIDAE  GASTROPODA Taxon Tree: EOGASTROPODA [Subclass]-EUOMPHALINA [Order]-OPHILETOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 0 Img
  • PARAULOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ONCOCERIDA [Order]-RUTOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • PARAWOCKLUMERIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CLYMENIIDA [Order]-WOCKLUMERIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 11 Sp, 0 Var, 7 Img
  • PARHEDYLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-ACOCHLIDIACEA [Order]-PARHEDYLOIDEA [Superfamily]  (Sea)  - 21 Sp, 0 Var, 9 Img
  • PARILIMYIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-PHOLADOMYOIDEA [Superfamily]  (Sea)  - 21 Sp, 0 Var, 12 Img
  • PARKINSONIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-PERISPHINCTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 44 Sp, 1 Var, 31 Img
  • PARMACELLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-PARMACELLOIDEA [Superfamily]  (Land)  - 21 Sp, 0 Var, 7 Img
  • PARODOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-TORNOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 14 Sp, 0 Var, 7 Img
  • PARTULIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-PARTULOIDEA [Superfamily]  (Land)  - 119 Sp, 12 Var, 53 Img
  • PARVULATOPSIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-NERITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • PASKENTANIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-ABYSSOCHRYSOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 4 Img
  • PASSALOTEUTHIDIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-BELEMNITIDA [Order]  (Sea)  (FOSSIL)  - 47 Sp, 0 Var, 18 Img
  • PATELLICONIDAE  MOLLUSCA INCERTAE SEDIS  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • PATELLIDAE  GASTROPODA Taxon Tree: PATELLOGASTROPODA [Subclass]-PATELLOIDEA [Superfamily]  (Sea)  - 96 Sp, 28 Var, 82 Img
  • PATELLOGASTROPODA (unassigned)  GASTROPODA Taxon Tree: PATELLOGASTROPODA [Subclass]  (Sea)  (FOSSIL)  - 0 Sp, 0 Var, 0 Img
  • PAUXILLITIDAE  HYOLITHA Taxon Tree: HYOLITHIDA [Order]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 0 Img
  • PAVLODISCIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-PORCELLIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • PECTINIDA (unassigned)  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]  (Sea)  (FOSSIL)  - 12 Sp, 0 Var, 3 Img
  • PECTINIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-PECTINOIDEA [Superfamily]  (Sea)  - 1103 Sp, 95 Var, 504 Img
  • PECTINODONTIDAE  GASTROPODA Taxon Tree: PATELLOGASTROPODA [Subclass]-LOTTIOIDEA [Superfamily]  (Sea)  - 30 Sp, 0 Var, 14 Img
  • PEDICULARIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-CYPRAEOIDEA [Superfamily]  (Sea)  - 51 Sp, 2 Var, 27 Img
  • PELAGIELLIDAE  HELCIONELLOIDA Taxon Tree: ARCHAEOBRANCHIA [Subclass]-PELAGIELLIFORMES [Order]-PELAGIELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 23 Sp, 0 Var, 6 Img
  • PELTOSPIRIDAE  GASTROPODA Taxon Tree: NEOMPHALINA [Subclass]-NEOMPHALOIDEA [Superfamily]  (Sea)  - 23 Sp, 0 Var, 16 Img
  • PELYCIDIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-LITTORINOIDEA [Superfamily]  (Sea)  - 13 Sp, 0 Var, 2 Img
  • PENDROMIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]  (Sea)  - 12 Sp, 0 Var, 3 Img
  • PENEAUIIDAE  TENTACULITA Taxon Tree: DACRYOCONARIDA [Subclass]-NOWAKIIDA [Order]  (Sea)  (FOSSIL)  - 7 Sp, 4 Var, 0 Img
  • PENICILLIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-CLAVAGELLOIDEA [Superfamily]  (Sea)  - 13 Sp, 0 Var, 7 Img
  • PERACLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-THECOSOMATA [Order]-CYMBULIOIDEA [Superfamily]  (Sea)  - 11 Sp, 1 Var, 10 Img
  • PEREIRAEIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-STROMBOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 6 Img
  • PERGAMIDIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PTERIIDA [Order]-PTERIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • PERICYCLIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-PERICYCLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 42 Sp, 0 Var, 12 Img
  • PERIPLOMATIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-THRACIOIDEA [Superfamily]  (Sea)  - 81 Sp, 1 Var, 29 Img
  • PERISPHINCTIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-PERISPHINCTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 236 Sp, 1 Var, 140 Img
  • PERISSITYIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]  (Sea)  (FOSSIL)  - 34 Sp, 0 Var, 17 Img
  • PERMANOMIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-ANOMIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • PERMOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-TRIGONOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • PERMONAUTILIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 0 Img
  • PERNOPECTINIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-ENTOLIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 20 Sp, 0 Var, 1 Img
  • PERRINITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-SHUMARDITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 26 Sp, 0 Var, 0 Img
  • PERSICITHECIDAE  HYOLITHA Taxon Tree: CALYPTOPTOMATIDA [Order]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 1 Img
  • PERSONIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TONNOIDEA [Superfamily]  (Sea)  - 38 Sp, 5 Var, 37 Img
  • PERUNELIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-PERUNELOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • PETTEROCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-PHARCICERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 1 Img
  • PHANEROTREMATIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-EOTOMARIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 33 Sp, 1 Var, 13 Img
  • PHARCICERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-PHARCICERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 41 Sp, 0 Var, 16 Img
  • PHARIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-SOLENIDA [Order]-SOLENOIDEA [Superfamily]  (Sea)  - 108 Sp, 2 Var, 52 Img
  • PHASEOLIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-NUCULANIDA [Order]-NUCULANOIDEA [Superfamily]  (Sea)  - 1 Sp, 0 Var, 0 Img
  • PHASIANELLIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-PHASIANELLOIDEA [Superfamily]  (Sea)  - 108 Sp, 11 Var, 78 Img
  • PHENACOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-DIMEROCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 9 Sp, 2 Var, 1 Img
  • PHENACOLEPADIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-NERITOIDEA [Superfamily]  (Sea)  - 51 Sp, 0 Var, 26 Img
  • PHILINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-CEPHALASPIDEA [Order]-PHILINOIDEA [Superfamily]  (Sea)  - 122 Sp, 2 Var, 36 Img
  • PHILINOGLOSSIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-CEPHALASPIDEA [Order]-PHILINOIDEA [Superfamily]  (Sea)  - 7 Sp, 0 Var, 1 Img
  • PHILINORBIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-CEPHALASPIDEA [Order]-PHILINOIDEA [Superfamily]  (Sea)  - 8 Sp, 0 Var, 2 Img
  • PHILOBRYIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-ARCIDA [Order]-LIMOPSOIDEA [Superfamily]  (Sea)  - 138 Sp, 0 Var, 20 Img
  • PHILOMYCIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ARIONOIDEA [Superfamily]  (Land)  - 36 Sp, 5 Var, 11 Img
  • PHOLADIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MYIDA [Order]-PHOLADOIDEA [Superfamily]  (Sea)  - 138 Sp, 4 Var, 75 Img
  • PHOLADOMYIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-PHOLADOMYOIDEA [Superfamily]  (Sea)  - 122 Sp, 1 Var, 35 Img
  • PHOLADOMYOIDEA (unassigned)  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-PHOLADOMYOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 15 Sp, 0 Var, 2 Img
  • PHOLIDOTEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order]  (Sea)  - 3 Sp, 0 Var, 2 Img
  • PHOLIDOTOMIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-MURICOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 23 Sp, 3 Var, 3 Img
  • PHRAGMOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-DISCOSORIDA [Order]  (Sea)  (FOSSIL)  - 104 Sp, 5 Var, 21 Img
  • PHRAGMOTEUTHIDIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-PHRAGMOTEUTHIDA [Order]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 1 Img
  • PHRICODOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-EODEROCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 32 Sp, 0 Var, 4 Img
  • PHTHANONCOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ELLESMEROCERIDA [Order]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • PHYLLIDIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-PHYLLIDIOIDEA [Superfamily]  (Sea)  - 77 Sp, 1 Var, 56 Img
  • PHYLLIROIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-TRITONIOIDEA [Superfamily]  (Sea)  - 5 Sp, 0 Var, 3 Img
  • PHYLLOCERATIDA (unassigned)  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-PHYLLOCERATIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • PHYLLOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-PHYLLOCERATIDA [Order]-PHYLLOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 120 Sp, 5 Var, 52 Img
  • PHYLLOMENIIDAE  SOLENOGASTRES Taxon Tree: SOLENOGASTRES [Subclass]-STERROFUSTIA [Order]  (Sea)  - 9 Sp, 0 Var, 4 Img
  • PHYMATOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-HILDOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 62 Sp, 0 Var, 26 Img
  • PHYMATOPLEURIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-PLEUROTOMARIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 69 Sp, 0 Var, 2 Img
  • PHYSIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-HYGROPHILA [Order]-PLANORBOIDEA [Superfamily]  (Freshwater)  - 152 Sp, 35 Var, 102 Img
  • PICHLERIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-CYRTODONTIDA [Order]-PICHLERIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 0 Img
  • PICKWORTHIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-LITTORINOIDEA [Superfamily]  (Sea)  - 79 Sp, 1 Var, 31 Img
  • PILEOLIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-NERITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 13 Sp, 0 Var, 11 Img
  • PILOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 4 Img
  • PINACITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-AGONIATITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 13 Sp, 0 Var, 5 Img
  • PINACOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-PINACOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 16 Sp, 0 Var, 0 Img
  • PINNIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-OSTREIDA [Order]-PINNOIDEA [Superfamily]  (Sea)  - 139 Sp, 1 Var, 54 Img
  • PINUFIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • PIRICLYMENIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CLYMENIIDA [Order]-PLATYCLYMENIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 1 Img
  • PISANIANURIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TONNOIDEA [Superfamily]  (Sea)  - 6 Sp, 0 Var, 2 Img
  • PISEINOTECIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-AEOLIDIOIDEA [Superfamily]  (Sea)  - 8 Sp, 0 Var, 4 Img
  • PLACENTICERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-HOPLITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 41 Sp, 6 Var, 14 Img
  • PLACUNIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-ANOMIOIDEA [Superfamily]  (Sea)  - 9 Sp, 0 Var, 5 Img
  • PLAGIOPTYCHIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-HIPPURITIDA [Order]-RADIOLITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 0 Img
  • PLAGIOTHYRIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-NERITOPSOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 14 Sp, 0 Var, 1 Img
  • PLAKOBRANCHIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-SACOGLOSSA [Order]-PLAKOBRANCHACEA [Suborder]-PLAKOBRANCHOIDEA [Superfamily]  (Sea)  - 130 Sp, 0 Var, 85 Img
  • PLANAXIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Sea)  - 105 Sp, 1 Var, 42 Img
  • PLANITROCHIDAE  GASTROPODA Taxon Tree: EOGASTROPODA [Subclass]-EUOMPHALINA [Order]-OPHILETOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 1 Img
  • PLANORBIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-HYGROPHILA [Order]-PLANORBOIDEA [Superfamily]  (Freshwater)  - 907 Sp, 80 Var, 212 Img
  • PLATYCERATIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-PLATYCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 379 Sp, 12 Var, 59 Img
  • PLATYCLYMENIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CLYMENIIDA [Order]-PLATYCLYMENIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 87 Sp, 2 Var, 15 Img
  • PLATYHEDYLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-SACOGLOSSA [Order]-PLAKOBRANCHACEA [Suborder]-PLAKOBRANCHOIDEA [Superfamily]  (Sea)  - 4 Sp, 0 Var, 1 Img
  • PLATYLENTICERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-PERISPHINCTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 1 Img
  • PLECTOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-BARRANDEOCERIDA [Order]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • PLECTONOTIDAE  GASTROPODA Taxon Tree: AMPHIGASTROPODA [Subclass]-BELLEROPHONTIDA [Order]-BELLEROPHONTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 47 Sp, 3 Var, 1 Img
  • PLECTOPYLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-PLECTOPYLOIDEA [Superfamily]  (Land)  - 117 Sp, 14 Var, 42 Img
  • PLECTRONOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-PLECTRONOCERIDA [Order]  (Sea)  (FOSSIL)  - 23 Sp, 0 Var, 0 Img
  • PLEIOPTYGMATIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-MURICOIDEA [Superfamily]  (Sea)  - 14 Sp, 0 Var, 12 Img
  • PLESIOTEUTHIDIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-TEUTHIDA [Order]  (Sea)  (FOSSIL)  - 10 Sp, 0 Var, 2 Img
  • PLESIOTROCHIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CAMPANILOIDEA [Superfamily]  (Sea)  - 23 Sp, 0 Var, 10 Img
  • PLETHOCARDIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MEGALODONTIDA [Order]-MECYNODONTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 2 Img
  • PLETHOSPIRIDAE  GASTROPODA Taxon Tree: ORTHOGASTROPODA [Subclass]-MURCHISONIINA [Order]-MURCHISONIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 10 Sp, 0 Var, 1 Img
  • PLEUROBRANCHAEIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-PLEUROBRANCHOMORPHA [Order]-PLEUROBRANCHOIDEA [Superfamily]  (Sea)  - 25 Sp, 0 Var, 9 Img
  • PLEUROBRANCHIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-PLEUROBRANCHOMORPHA [Order]-PLEUROBRANCHOIDEA [Superfamily]  (Sea)  - 88 Sp, 0 Var, 35 Img
  • PLEUROCERIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Freshwater)  - 258 Sp, 56 Var, 76 Img
  • PLEURODESMATIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MYIDA [Order]-MYOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • PLEURODISCIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-CHONDRINOIDEA [Superfamily]  (Land)  - 9 Sp, 0 Var, 3 Img
  • PLEURODONTIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-POLYGYROIDEA [Superfamily]  (Land)  - 124 Sp, 33 Var, 93 Img
  • PLEUROLIDIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-AEOLIDIOIDEA [Superfamily]  (Sea)  - 2 Sp, 0 Var, 1 Img
  • PLEUROMYIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MYIDA [Order]-PLEUROMYOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 26 Sp, 0 Var, 6 Img
  • PLEURONAUTILIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 0 Img
  • PLEURONECTITIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-PECTINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • PLEURONODOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-XENODISCOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 39 Sp, 0 Var, 0 Img
  • PLEUROTOMARIIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-PLEUROTOMARIOIDEA [Superfamily]  (Sea)  - 283 Sp, 9 Var, 89 Img
  • PLEUROTOMARIOIDEA (unassigned)  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-PLEUROTOMARIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 0 Img
  • PLICATOSTYLIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PTERIIDA [Order]-PTERIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • PLICATOUNIONIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-TRIGONIOIDOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • PLICATULIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-PLICATULOIDEA [Superfamily]  (Sea)  - 79 Sp, 3 Var, 40 Img
  • PLICATUSIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-PERUNELOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • PLIOPHOLYGIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-ARCHITAENIOGLOSSA [Order]-VIVIPAROIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • PNEUMODERMATIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-GYMNOSOMATA [Order]-CLIONOIDEA [Superfamily]  (Sea)  - 25 Sp, 7 Var, 31 Img
  • POLIDEVCIIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-NUCULANIDA [Order]-NUCULANOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 1 Img
  • POLLICIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-ARCTICOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • POLLICINIDAE  MONOPLACOPHORA Taxon Tree: CYRTONELLIDA [Order]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • POLYCERIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-POLYCEROIDEA [Superfamily]  (Sea)  - 165 Sp, 4 Var, 103 Img
  • POLYCONITIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-HIPPURITIDA [Order]-RADIOLITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 1 Img
  • POLYCYLINDRITIDAE  TENTACULITA Taxon Tree: CHONIOCONARIDA [Subclass]-LIRIOCONARIDA [Superorder]-HOMOCTENIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • POLYDESMIIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ACTINOCERIDA [Order]  (Sea)  (FOSSIL)  - 15 Sp, 0 Var, 4 Img
  • POLYELASMOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ONCOCERIDA [Order]  (Sea)  (FOSSIL)  - 11 Sp, 0 Var, 1 Img
  • POLYGYRIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-POLYGYROIDEA [Superfamily]  (Land)  - 291 Sp, 31 Var, 96 Img
  • POLYGYRINIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-PERUNELOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 13 Sp, 0 Var, 3 Img
  • POLYMERIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-DISSIDOCERIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • POLYMORPHITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-EODEROCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 74 Sp, 4 Var, 16 Img
  • POLYPLACOPHORA (unassigned)  POLYPLACOPHORA  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • POLYPTYCHITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-PERISPHINCTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 117 Sp, 0 Var, 15 Img
  • POLYTREMARIIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-PLEUROTOMARIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • POMATIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-LITTORINOIDEA [Superfamily]  (Land)  - 839 Sp, 551 Var, 579 Img
  • POMATIOPSIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TRUNCATELLOIDEA [Superfamily]  (Freshwater)  - 203 Sp, 17 Var, 51 Img
  • POMMEROZYGIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-PERUNELOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 1 Img
  • PONTICERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-GEPHUROCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 30 Sp, 0 Var, 2 Img
  • POPANOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-POPANOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • POPENELLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 0 Img
  • PORCELLIIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-PORCELLIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 89 Sp, 0 Var, 8 Img
  • POROMYIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-POROMYOIDEA [Superfamily]  (Sea)  - 75 Sp, 0 Var, 33 Img
  • PORTLOCKIELLIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-PLEUROTOMARIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 32 Sp, 0 Var, 3 Img
  • POSIDONIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-OSTREIDA [Order]-POSIDONIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 35 Sp, 0 Var, 6 Img
  • POSTTORNOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-TORNOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 25 Sp, 0 Var, 2 Img
  • POTAMIDIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Sea)  - 237 Sp, 49 Var, 173 Img
  • POTERIOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ONCOCERIDA [Order]  (Sea)  (FOSSIL)  - 13 Sp, 0 Var, 6 Img
  • PRAECARDIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-CYRTODONTIDA [Order]-PRAECARDIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 12 Sp, 0 Var, 1 Img
  • PRAECARDIOIDEA (unassigned)  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-CYRTODONTIDA [Order]-PRAECARDIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 0 Sp, 0 Var, 0 Img
  • PRAECUVIERINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-THECOSOMATA [Order]-CAVOLINIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • PRAEGLYPHIOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-PRIONOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 8 Sp, 1 Var, 0 Img
  • PRAELUCINIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-CYRTODONTIDA [Order]-DUALINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 0 Img
  • PRAENUCULIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-NUCULIDA [Order]-NUCULOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 31 Sp, 0 Var, 14 Img
  • PRAGOSCUTULIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 1 Img
  • PRAGOSERPULINIDAE  GASTROPODA Taxon Tree: EOGASTROPODA [Subclass]-EUOMPHALINA [Order]-OPHILETOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • PREACANTHOCHITONIDAE  POLYPLACOPHORA Taxon Tree: PALEOLORICATA [Subclass]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • PRILUKIELLIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-PRILUKIELLOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 5 Sp, 1 Var, 0 Img
  • PRIONITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-MEEKOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 52 Sp, 0 Var, 1 Img
  • PRIONOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-PRIONOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 79 Sp, 0 Var, 4 Img
  • PRISTILOMATIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-GASTRODONTOIDEA [Superfamily]  (Land)  - 117 Sp, 5 Var, 27 Img
  • PROARCESTIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-ARCESTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • PROBILLINGSITIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ASCOCERIDA [Order]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 1 Img
  • PROCARINARIIDAE  HELCIONELLOIDA Taxon Tree: ARCHAEOBRANCHIA [Subclass]-HELCIONELLIFORMES [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • PROCARNITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-MEGAPHYLLITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 13 Sp, 0 Var, 0 Img
  • PROCERITHIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 55 Sp, 0 Var, 25 Img
  • PROCHAETODERMATIDAE  CAUDOFOVEATA Taxon Tree: CAUDOFOVEATA [Subclass]-CHAETODERMATIDA [Order]  (Sea)  - 42 Sp, 0 Var, 7 Img
  • PROCONULIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-TROCHOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 30 Sp, 1 Var, 12 Img
  • PROCORNICULINIDAE  TENTACULITA Taxon Tree: DACRYOCONARIDA [Subclass]-PROCORNICULINIDA [Order]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • PROCTONOTIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]  (Sea)  - 32 Sp, 0 Var, 22 Img
  • PRODENTALIIDAE  SCAPHOPODA Taxon Tree: DENTALIIDA [Order]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 1 Img
  • PRODROMITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-KARAGANDOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • PROKOPIEVSKIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-MYALINIDA [Order]-PROKOPIEVSKIOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 6 Sp, 0 Var, 5 Img
  • PROLECANITIDA (unassigned)  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-PROLECANITIDA [Order]  (Sea)  (FOSSIL)  - 10 Sp, 0 Var, 0 Img
  • PROLECANITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-PROLECANITIDA [Order]-PROLECANITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 39 Sp, 0 Var, 2 Img
  • PROLOBITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-DIMEROCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 17 Sp, 1 Var, 5 Img
  • PROLYELLICERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ACANTHOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 10 Sp, 0 Var, 1 Img
  • PROMACHOTEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order]  (Sea)  - 3 Sp, 0 Var, 1 Img
  • PRONEOMENIIDAE  SOLENOGASTRES Taxon Tree: SOLENOGASTRES [Subclass]-CAVIBELONIA [Order]  (Sea)  - 37 Sp, 0 Var, 13 Img
  • PRONORITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-PROLECANITIDA [Order]-MEDLICOTTIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 46 Sp, 0 Var, 1 Img
  • PROPEAMUSSIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-PECTINOIDEA [Superfamily]  (Sea)  - 203 Sp, 3 Var, 115 Img
  • PROPLINIDAE  MONOPLACOPHORA Taxon Tree: TRYBLIDIIDA [Order]-TRYBLIDIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 0 Img
  • PROPTYCHITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-MEEKOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 116 Sp, 0 Var, 1 Img
  • PROPUPASPIRIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 1 Img
  • PROSERPINELLIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-HELICINOIDEA [Superfamily]  (Land)  - 14 Sp, 0 Var, 1 Img
  • PROSERPINIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-HELICINOIDEA [Superfamily]  (Land)  - 9 Sp, 1 Var, 5 Img
  • PROSOCOELIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MEGALODONTIDA [Order]-MECYNODONTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 0 Img
  • PROSOGYROTRIGONIIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-TRIGONIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • PROSPONDYLIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-PROSPONDYLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • PROSTYLIFERIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 0 Img
  • PROTACTINOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-PROTACTINOCERIDA [Order]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • PROTANCYLOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ANCYLOCERATINA [Suborder]-PROTANCYLOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 28 Sp, 0 Var, 8 Img
  • PROTEOCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-ORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 49 Sp, 0 Var, 4 Img
  • PROTEROCAMEROCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ENDOCERIDA [Order]  (Sea)  (FOSSIL)  - 50 Sp, 0 Var, 4 Img
  • PROTEUSITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-NATHORSTITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 2 Img
  • PROTHYRIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-SOLENIDA [Order]-ORTHONOTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 19 Sp, 0 Var, 5 Img
  • PROTOCHITONIDAE  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]-LEPIDOPLEURIDA [Order]-LEPIDOPLEURINA [Suborder]  (Sea)  - 4 Sp, 0 Var, 1 Img
  • PROTOCONCHOIDIDAE  MONOPLACOPHORA Taxon Tree: TRYBLIDIIDA [Order]-TRYBLIDIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 11 Sp, 0 Var, 1 Img
  • PROTOCUSPIDARIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-CUSPIDARIOIDEA [Superfamily]  (Sea)  - 19 Sp, 0 Var, 2 Img
  • PROTOCYCLOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ELLESMEROCERIDA [Order]  (Sea)  (FOSSIL)  - 40 Sp, 0 Var, 3 Img
  • PROTORCULIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-PERUNELOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 46 Sp, 0 Var, 2 Img
  • PROVANNIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-ABYSSOCHRYSOIDEA [Superfamily]  (Sea)  - 54 Sp, 0 Var, 25 Img
  • PRUVOTINIDAE  SOLENOGASTRES Taxon Tree: SOLENOGASTRES [Subclass]-CAVIBELONIA [Order]  (Sea)  - 31 Sp, 0 Var, 6 Img
  • PSAMMOBIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-TELLINOIDEA [Superfamily]  (Sea)  - 177 Sp, 6 Var, 110 Img
  • PSEUDARCIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-LYRODESMATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • PSEUDARIETITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-PRIONOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 10 Sp, 0 Var, 0 Img
  • PSEUDOBIGALEAIDAE  ROSTROCONCHIA Taxon Tree: CONOCARDIIDA [Order]-HIPPOCARDIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 32 Sp, 0 Var, 7 Img
  • PSEUDOCARDINIIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-PSEUDOCARDINIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • PSEUDOCLYMENIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-TORNOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 11 Sp, 0 Var, 1 Img
  • PSEUDOCOCCULINIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-LEPETELLOIDEA [Superfamily]  (Sea)  - 45 Sp, 0 Var, 23 Img
  • PSEUDOCYRTODONTIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-NUCULANIDA [Order]-NUCULANOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 3 Img
  • PSEUDODICOELITIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-BELEMNITIDA [Order]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 0 Img
  • PSEUDOHALORITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-PSEUDOHALORITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 50 Sp, 0 Var, 0 Img
  • PSEUDOHYRIIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-TRIGONIOIDOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 10 Sp, 0 Var, 2 Img
  • PSEUDOLIVIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-OLIVOIDEA [Superfamily]  (Sea)  - 62 Sp, 5 Var, 39 Img
  • PSEUDOMELANIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-PSEUDOMELANIOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 60 Sp, 0 Var, 21 Img
  • PSEUDOMELATOMIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-CONOIDEA [Superfamily]  (Sea)  - 771 Sp, 22 Var, 448 Img
  • PSEUDOMONOTIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-PSEUDOMONOTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 44 Sp, 0 Var, 3 Img
  • PSEUDONAUTILIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-NAUTILITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 49 Sp, 0 Var, 2 Img
  • PSEUDOPARALEGOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-SCHISTOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 10 Sp, 0 Var, 1 Img
  • PSEUDOPHORIDAE  GASTROPODA Taxon Tree: EOGASTROPODA [Subclass]-EUOMPHALINA [Order]-OPHILETOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 70 Sp, 0 Var, 8 Img
  • PSEUDORTHOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-PSEUDORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 47 Sp, 0 Var, 10 Img
  • PSEUDORTHONYCHIIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-NERITOPSOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • PSEUDOSCHIZOGONIIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-EOTOMARIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 1 Img
  • PSEUDOTIROLITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-XENODISCOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 34 Sp, 0 Var, 0 Img
  • PSEUDOTISSOTIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ACANTHOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 22 Sp, 4 Var, 15 Img
  • PSEUDOTRITONIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]  (Sea)  (FOSSIL)  - 22 Sp, 0 Var, 10 Img
  • PSEUDOTURCICIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-SEGUENZIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • PSEUDOVERMIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-FIONOIDEA [Superfamily]  (Sea)  - 16 Sp, 0 Var, 2 Img
  • PSEUDOWORTHENIELLIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-SCHIZOGONIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • PSEUDOZYGOPLEURIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]  (Sea)  (FOSSIL)  - 173 Sp, 0 Var, 13 Img
  • PSEUDUNELIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-ACOCHLIDIACEA [Order]-ACOCHLIDIOIDEA [Superfamily]  (Sea)  - 5 Sp, 0 Var, 2 Img
  • PSILOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-PSILOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 46 Sp, 0 Var, 8 Img
  • PSYCHROTEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • PTERIIDA (unassigned)  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PTERIIDA [Order]  (Sea)  (FOSSIL)  - 78 Sp, 0 Var, 4 Img
  • PTERIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PTERIIDA [Order]-PTERIOIDEA [Superfamily]  (Sea)  - 208 Sp, 15 Var, 113 Img
  • PTERINEIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-OSTREIDA [Order]  (Sea)  (FOSSIL)  - 114 Sp, 1 Var, 38 Img
  • PTERINOPECTINIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-PTERINOPECTINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 68 Sp, 2 Var, 17 Img
  • PTERIOIDEA (unassigned)  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PTERIIDA [Order]-PTERIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 1 Img
  • PTERIOMORPHIA (unassigned)  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 1 Img
  • PTEROCARDIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-CARDIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 11 Sp, 0 Var, 0 Img
  • PTEROTHECIDAE  GASTROPODA Taxon Tree: AMPHIGASTROPODA [Subclass]-BELLEROPHONTIDA [Order]-BELLEROPHONTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 54 Sp, 0 Var, 2 Img
  • PTEROTRACHEIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-PTEROTRACHEOIDEA [Superfamily]  (Sea)  - 6 Sp, 0 Var, 4 Img
  • PTEROTRIGONIIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-MEGATRIGONIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 91 Sp, 3 Var, 9 Img
  • PTERYGOTHECIDAE  HYOLITHA Taxon Tree: HYOLITHIDA [Order]-HYOLITHINA [Suborder]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • PTYCHATRACTIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-TURBINELLOIDEA [Superfamily]  (Sea)  - 66 Sp, 3 Var, 36 Img
  • PTYCHITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-PTYCHITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 31 Sp, 0 Var, 1 Img
  • PTYCHOCAULIDAE  GASTROPODA Taxon Tree: ORTHOGASTROPODA [Subclass]-MURCHISONIINA [Order]-MURCHISONIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 20 Sp, 1 Var, 1 Img
  • PTYCHOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ANCYLOCERATINA [Suborder]-ANCYLOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 23 Sp, 1 Var, 2 Img
  • PTYCHOMPHALIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-PTYCHOMPHALOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 34 Sp, 0 Var, 2 Img
  • PTYCHOMYIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-CARDITIDA [Order]-CRASSATELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 1 Var, 2 Img
  • PUCAMYIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-ARCIDA [Order]-GLYPTARCOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • PUGNELLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-STROMBOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 35 Sp, 0 Var, 27 Img
  • PULCHELLIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-PULCHELLIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 21 Sp, 0 Var, 14 Img
  • PULSELLIDAE  SCAPHOPODA Taxon Tree: GADILIDA [Order]  (Sea)  - 40 Sp, 0 Var, 13 Img
  • PULVINITIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PTERIIDA [Order]-PTERIOIDEA [Superfamily]  (Sea)  - 3 Sp, 0 Var, 2 Img
  • PUNCTIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-PUNCTOIDEA [Superfamily]  (Land)  - 184 Sp, 11 Var, 64 Img
  • PUPILLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-PUPILLOIDEA [Superfamily]  (Land)  - 96 Sp, 5 Var, 32 Img
  • PUPINIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-ARCHITAENIOGLOSSA [Order]-CYCLOPHOROIDEA [Superfamily]  (Land)  - 173 Sp, 12 Var, 108 Img
  • PURPURINIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-LITTORINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 45 Sp, 1 Var, 16 Img
  • PURPUROIDEIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-LITTORINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 33 Sp, 0 Var, 5 Img
  • PYRAMIDELLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PYRAMIDELLOIDEA [Superfamily]  (Sea)  - 3869 Sp, 51 Var, 1046 Img
  • PYRAMIDULIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-CHONDRINOIDEA [Superfamily]  (Land)  - 13 Sp, 2 Var, 10 Img
  • PYRAMIMITRIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]  (Sea)  - 19 Sp, 0 Var, 16 Img
  • PYROPELTIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-LEPETELLOIDEA [Superfamily]  (Sea)  - 8 Sp, 0 Var, 4 Img
  • PYROPSIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-SARGANOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 0 Sp, 0 Var, 0 Img
  • PYROTEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order]  (Sea)  - 7 Sp, 0 Var, 3 Img
  • QUENSTEDTIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-TELLINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 22 Sp, 0 Var, 9 Img
  • QUIJOTIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-PLEUROBRANCHOMORPHA [Order]-PLEUROBRANCHOIDEA [Superfamily]  (Sea)  - 1 Sp, 0 Var, 0 Img
  • RADIOLITIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-HIPPURITIDA [Order]-RADIOLITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 85 Sp, 0 Var, 12 Img
  • RAETOMYIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MYIDA [Order]-MYOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • RAMONALINIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-MYALINIDA [Order]-AMBONYCHIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • RAMOSITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-NEODIMORPHOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 17 Sp, 0 Var, 4 Img
  • RANELLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TONNOIDEA [Superfamily]  (Sea)  - 305 Sp, 34 Var, 253 Img
  • RANGEROCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-DISSIDOCERIDA [Order]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • RAPHISTOMATIDAE  GASTROPODA Taxon Tree: EOGASTROPODA [Subclass]-EUOMPHALINA [Order]-OPHILETOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 71 Sp, 1 Var, 18 Img
  • RAPHITOMIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-CONOIDEA [Superfamily]  (Sea)  - 931 Sp, 63 Var, 461 Img
  • RASTODENTIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-CINGULOPSOIDEA [Superfamily]  (Sea)  - 9 Sp, 0 Var, 2 Img
  • RATHOUISIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-SYSTELLOMMATOPHORA [Order]-VERONICELLOIDEA [Superfamily]  (Land)  - 14 Sp, 0 Var, 1 Img
  • RECTOCLYMENIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CLYMENIIDA [Order]-CYRTOCLYMENIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 33 Sp, 2 Var, 4 Img
  • REDONIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-ACTINODONTIDA [Order]-ANODONTOPSOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 4 Img
  • REINECKEIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-PERISPHINCTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 40 Sp, 2 Var, 14 Img
  • REQUIENIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-HIPPURITIDA [Order]-REQUIENIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 23 Sp, 1 Var, 9 Img
  • RETICULOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-GASTRIOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 68 Sp, 1 Var, 14 Img
  • RETROCERAMIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-MYALINIDA [Order]-INOCERAMOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 14 Sp, 0 Var, 0 Img
  • RETUSIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-CEPHALASPIDEA [Order]-BULLOIDEA [Superfamily]  (Sea)  - 158 Sp, 6 Var, 66 Img
  • RHABDIDAE  SCAPHOPODA Taxon Tree: DENTALIIDA [Order]  (Sea)  - 8 Sp, 0 Var, 3 Img
  • RHABDOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-CHORISTOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • RHAPHISCHISMATIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-PLEUROTOMARIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • RHAPHISTOMELLIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-PTYCHOMPHALOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 2 Img
  • RHIPHAEOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-TAINOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 11 Sp, 0 Var, 0 Img
  • RHIPHAEOTEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DONOVANICONIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • RHIPIDOHERPIIDAE  SOLENOGASTRES Taxon Tree: SOLENOGASTRES [Subclass]-CAVIBELONIA [Order]  (Sea)  - 2 Sp, 0 Var, 0 Img
  • RHIZORIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-CEPHALASPIDEA [Order]-BULLOIDEA [Superfamily]  (Sea)  - 52 Sp, 3 Var, 25 Img
  • RHODOPIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-MURCHISONELLOIDEA [Superfamily]  (Sea)  - 8 Sp, 0 Var, 2 Img
  • RHOMBOPTERIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-OSTREIDA [Order]-RHOMBOPTERIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • RHOPALOMENIIDAE  SOLENOGASTRES Taxon Tree: SOLENOGASTRES [Subclass]-CAVIBELONIA [Order]  (Sea)  - 14 Sp, 0 Var, 2 Img
  • RHYMMOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-NEOGLYPHIOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 1 Img
  • RHYTIDIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-RHYTIDOIDEA [Superfamily]  (Land)  - 158 Sp, 36 Var, 58 Img
  • RHYTIDOPILIDAE  GASTROPODA Taxon Tree: EOGASTROPODA [Subclass]-EUOMPHALINA [Order]-OPHILETOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • RIBEIRIIDAE  ROSTROCONCHIA Taxon Tree: RIBEIRIOIDA [Order]-RIBEIRIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 36 Sp, 0 Var, 20 Img
  • RIMELLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-STROMBOIDEA [Superfamily]  (Sea)  - 66 Sp, 1 Var, 45 Img
  • RIMKINITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-CERATITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • RINGICULIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-HETEROSTROPHA [Infraclass]-RINGICULOIDEA [Superfamily]  (Sea)  - 157 Sp, 3 Var, 49 Img
  • RIOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ELLESMEROCERIDA [Order]  (Sea)  (FOSSIL)  - 11 Sp, 0 Var, 0 Img
  • RISSOELLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-HETEROSTROPHA [Infraclass]-RISSOELLOIDEA [Superfamily]  (Sea)  - 82 Sp, 4 Var, 20 Img
  • RISSOIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-RISSOOIDEA [Superfamily]  (Sea)  - 1197 Sp, 105 Var, 532 Img
  • RISSOINIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-RISSOOIDEA [Superfamily]  (Sea)  - 523 Sp, 14 Var, 213 Img
  • RISSOOIDEA (unassigned)  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-RISSOOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 33 Sp, 1 Var, 1 Img
  • ROSSIITIDAE  TENTACULITA Taxon Tree: CHONIOCONARIDA [Subclass]-TROMPETOCONARIDA [Superorder]-VOLYNITIDA [Order]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 0 Img
  • ROSTELLARIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-STROMBOIDEA [Superfamily]  (Sea)  - 206 Sp, 13 Var, 155 Img
  • ROTOPERICYCLIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-PERICYCLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 6 Img
  • RUDOLFOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ELLESMEROCERIDA [Order]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 0 Img
  • RUEDEMANNOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-DISCOSORIDA [Order]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 3 Img
  • RUGAECONIDAE  HELCIONELLOIDA Taxon Tree: ARCHAEOBRANCHIA [Subclass]-HELCIONELLIFORMES [Order]-YOCHELCIONELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 16 Sp, 0 Var, 3 Img
  • RUNCINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-CEPHALASPIDEA [Order]-RUNCINOIDEA [Superfamily]  (Sea)  - 54 Sp, 0 Var, 18 Img
  • RUTITRIGONIIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-MYOPHORELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 49 Sp, 0 Var, 3 Img
  • RUTOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-RUTOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 16 Sp, 0 Var, 4 Img
  • SABRINELLIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-SEGUENZIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • SACHITIDA (unassigned)  DIPLACOPHORA Taxon Tree: SACHITIDA [Order]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • SACOGLOSSA (unassigned)  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-SACOGLOSSA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • SACTORTHOCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-DISSIDOCERIDA [Order]  (Sea)  (FOSSIL)  - 11 Sp, 0 Var, 5 Img
  • SAGDIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-SAGDOIDEA [Superfamily]  (Land)  - 96 Sp, 4 Var, 55 Img
  • SAGECERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-SAGECERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 0 Img
  • SAHAROPTERIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • SAIKRACONCHIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-MYALINIDA [Order]-ALATOCONCHOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • SALPINGOTEUTHIDIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-BELEMNITIDA [Order]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 3 Img
  • SANCTICAROLITIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-UNIONIDA [Order]-UNIONOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • SANDALOMENIIDAE  SOLENOGASTRES Taxon Tree: SOLENOGASTRES [Subclass]-PHOLIDOSKEPIA [Order]  (Sea)  - 2 Sp, 0 Var, 0 Img
  • SANDLINGITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-CLYDONITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 13 Sp, 0 Var, 0 Img
  • SANGUINOLITIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-GRAMMYSIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 111 Sp, 0 Var, 10 Img
  • SAREPTIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-NUCULIDA [Order]-SAREPTOIDEA [Superfamily]  (Sea)  - 22 Sp, 0 Var, 5 Img
  • SARGANIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-SARGANOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 1 Img
  • SCALANERITINIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-NERITOPSOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 5 Img
  • SCALIOLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Sea)  - 48 Sp, 2 Var, 14 Img
  • SCANOCHITONIDAE  POLYPLACOPHORA Taxon Tree: PALEOLORICATA [Subclass]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • SCAPHANDRIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-CEPHALASPIDEA [Order]-PHILINOIDEA [Superfamily]  (Sea)  - 113 Sp, 4 Var, 46 Img
  • SCAPHELLINIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-TRIGONIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • SCAPHITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-TURRILITINA [Order]-SCAPHITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 138 Sp, 8 Var, 45 Img
  • SCAPHOPODA INCERTAE SEDIS  SCAPHOPODA  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • SCENELLIDAE  MONOPLACOPHORA Taxon Tree: CYRTONELLIDA [Order]-SCENELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 49 Sp, 0 Var, 7 Img
  • SCHISTOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-SCHISTOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 21 Sp, 0 Var, 3 Img
  • SCHIZOCHITONIDAE  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]-CHITONIDA [Order]-CHITONINA [Suborder]-SCHIZOCHITONOIDEA [Superfamily]  (Sea)  - 4 Sp, 1 Var, 2 Img
  • SCHIZODIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-TRIGONIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 81 Sp, 0 Var, 13 Img
  • SCHIZOGONIIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-SCHIZOGONIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 14 Sp, 0 Var, 5 Img
  • SCHIZOPLACIDAE  POLYPLACOPHORA Taxon Tree: NEOLORICATA [Subclass]-CHITONIDA [Order]-ACANTHOCHITONINA [Suborder]-MOPALIOIDEA [Superfamily]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • SCHLOENBACHIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-HOPLITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 5 Var, 7 Img
  • SCHLOTHEIMIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-PSILOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 35 Sp, 0 Var, 8 Img
  • SCISSURELLIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-SCISSURELLOIDEA [Superfamily]  (Sea)  - 133 Sp, 0 Var, 58 Img
  • SCOLIOSTOMATIDAE  GASTROPODA Taxon Tree: EOGASTROPODA [Subclass]-EUOMPHALINA [Order]-OPHILETOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 12 Sp, 0 Var, 0 Img
  • SCOLODONTIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-RHYTIDOIDEA [Superfamily]  (Land)  - 115 Sp, 1 Var, 24 Img
  • SCROBICULARIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-TELLINOIDEA [Superfamily]  (Sea)  - 5 Sp, 0 Var, 3 Img
  • SCULPTARIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-PLECTOPYLOIDEA [Superfamily]  (Land)  - 16 Sp, 5 Var, 5 Img
  • SCYLLAEIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-TRITONIOIDEA [Superfamily]  (Sea)  - 11 Sp, 0 Var, 4 Img
  • SCYPHOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-AIPOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 11 Sp, 0 Var, 1 Img
  • SEGUENZIIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-SEGUENZIOIDEA [Superfamily]  (Sea)  - 158 Sp, 0 Var, 47 Img
  • SEGUENZIOIDEA (unassigned)  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-SEGUENZIOIDEA [Superfamily]  (Sea)  - 179 Sp, 0 Var, 78 Img
  • SELLACLYMENIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CLYMENIIDA [Order]-GONIOCLYMENIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 2 Img
  • SEMELIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-TELLINOIDEA [Superfamily]  (Sea)  - 250 Sp, 9 Var, 134 Img
  • SEMISULCOSPIRIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Freshwater)  - 65 Sp, 20 Var, 34 Img
  • SENDERZONIELLIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-PRILUKIELLOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 2 Sp, 0 Var, 2 Img
  • SEPIADARIIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-SEPIIDA [Order]  (Sea)  - 9 Sp, 0 Var, 3 Img
  • SEPIIDA (unassigned)  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-SEPIIDA [Order]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 4 Img
  • SEPIIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-SEPIIDA [Order]  (Sea)  - 123 Sp, 1 Var, 40 Img
  • SEPIOLIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-SEPIOLIDA [Order]  (Sea)  - 74 Sp, 2 Var, 22 Img
  • SERAPHSIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-STROMBOIDEA [Superfamily]  (Sea)  - 51 Sp, 3 Var, 31 Img
  • SETTSASSIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]  (Freshwater)  (FOSSIL)  - 19 Sp, 0 Var, 3 Img
  • SHAANXICONCHIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-ANTHRACOSIOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 21 Sp, 2 Var, 0 Img
  • SHELBYOCERIDAE  MONOPLACOPHORA Taxon Tree: HYPSELOCONIDA [Order]-HYPSELOCONOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • SHIDELEROCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ELLESMEROCERIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • SHUMARDITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-SHUMARDITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 1 Img
  • SIBERIONAUTILIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-CLYDONAUTILOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • SIBIRITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-CERATITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 71 Sp, 0 Var, 0 Img
  • SICHUANOCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-ORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • SILESITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-DESMOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 20 Sp, 0 Var, 13 Img
  • SILESUNIONIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-UNIONIDA [Order]-SILESUNIONOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 4 Sp, 0 Var, 3 Img
  • SILICULIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-NUCULANIDA [Order]-NUCULANOIDEA [Superfamily]  (Sea)  - 10 Sp, 0 Var, 3 Img
  • SILIQUARIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Sea)  - 50 Sp, 1 Var, 29 Img
  • SIMILODONTIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-AFGHANODESMATIDA [Order]-TIRONUCULOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • SIMILOTHECIDAE  HYOLITHA Taxon Tree: HYOLITHIDA [Order]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • SIMOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-PERISPHINCTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 1 Img
  • SIMPULOPSIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ORTHALICOIDEA [Superfamily]  (Land)  - 76 Sp, 17 Var, 39 Img
  • SIMROTHIELLIDAE  SOLENOGASTRES Taxon Tree: SOLENOGASTRES [Subclass]-CAVIBELONIA [Order]  (Sea)  - 38 Sp, 0 Var, 10 Img
  • SINOBELEMNITIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-BELEMNITIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 1 Img
  • SINOCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-ORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 10 Sp, 0 Var, 3 Img
  • SINUICERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • SINUITIDAE  GASTROPODA Taxon Tree: AMPHIGASTROPODA [Subclass]-BELLEROPHONTIDA [Order]-BELLEROPHONTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 61 Sp, 1 Var, 9 Img
  • SINUOPEIDAE  GASTROPODA Taxon Tree: EOGASTROPODA [Subclass]-EUOMPHALINA [Order]-OPHILETOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 42 Sp, 0 Var, 10 Img
  • SIPHOGONUCHITIDAE  DIPLACOPHORA Taxon Tree: SACHITIDA [Order]-SIPHOGONUCHITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 12 Sp, 0 Var, 1 Img
  • SIPHONARIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-SIPHONARIOIDEA [Superfamily]  (Sea)  - 117 Sp, 11 Var, 80 Img
  • SITITHECIDAE  HYOLITHA Taxon Tree: ORTHOTHECIDA [Order]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • SKENEIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-TROCHOIDEA [Superfamily]  (Sea)  - 289 Sp, 3 Var, 128 Img
  • SKENEOPSIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-LITTORINOIDEA [Superfamily]  (Sea)  - 5 Sp, 1 Var, 3 Img
  • SLAVIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-CYRTODONTIDA [Order]-CARDIOLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 2 Img
  • SMEAGOLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-EUPULMONATA [Order]-ELLOBIOIDEA [Superfamily]  (Freshwater)  - 5 Sp, 0 Var, 1 Img
  • SOBOLEWIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-ANARCESTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 22 Sp, 0 Var, 9 Img
  • SOLARIELLIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-TROCHOIDEA [Superfamily]  (Sea)  - 292 Sp, 6 Var, 118 Img
  • SOLECURTIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-TELLINOIDEA [Superfamily]  (Sea)  - 81 Sp, 7 Var, 56 Img
  • SOLEMYIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-SOLEMYIDA [Order]-SOLEMYOIDEA [Superfamily]  (Sea)  - 75 Sp, 0 Var, 31 Img
  • SOLENIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-SOLENIDA [Order]-SOLENOIDEA [Superfamily]  (Sea)  - 108 Sp, 1 Var, 45 Img
  • SOLENISCIDAE  GASTROPODA Taxon Tree: ORTHOGASTROPODA [Subclass]-MURCHISONIINA [Order]-LOXONEMATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 178 Sp, 1 Var, 16 Img
  • SOLENOCARIDIDAE  POLYPLACOPHORA Taxon Tree: PALEOLORICATA [Subclass]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • SOLENOCHILIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-AIPOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 2 Img
  • SOLENOMORPHIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-SOLENIDA [Order]-ORTHONOTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • SOMOHOLITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-SHUMARDITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 22 Sp, 0 Var, 0 Img
  • SONNINIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-HILDOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 94 Sp, 1 Var, 85 Img
  • SOWERBYIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-TELLINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • SPANILIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-CYRTODONTIDA [Order]-DUALINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • SPANIONEMATIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • SPEIGHTIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 1 Img
  • SPELAEODISCIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ORCULOIDEA [Superfamily]  (Land)  - 17 Sp, 2 Var, 10 Img
  • SPHAERIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-SPHAERIOIDEA [Superfamily]  (Freshwater)  - 263 Sp, 5 Var, 82 Img
  • SPHAEROCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-STEPHANOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 49 Sp, 0 Var, 19 Img
  • SPHAEROCINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-THECOSOMATA [Order]-CAVOLINIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • SPHAERODOMIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-PERUNELOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 0 Img
  • SPHAERORTHOCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-ORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 26 Sp, 0 Var, 5 Img
  • SPHENIOPSIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-CUSPIDARIOIDEA [Superfamily]  (Sea)  - 17 Sp, 0 Var, 6 Img
  • SPHENOCLYMENIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CLYMENIIDA [Order]-GONIOCLYMENIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 10 Sp, 0 Var, 3 Img
  • SPHENODISCIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ACANTHOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 25 Sp, 0 Var, 6 Img
  • SPHINCTEROCHILIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-HELICOIDEA [Superfamily]  (Land)  - 40 Sp, 11 Var, 29 Img
  • SPHINGITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-ARCESTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 0 Img
  • SPHOOCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-ORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 2 Img
  • SPINILOMATIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-STROMBOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 29 Sp, 0 Var, 20 Img
  • SPINULITHECIDAE  HYOLITHA Taxon Tree: CIRCOTHECIDA [Order]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 0 Img
  • SPIRAXIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-TESTACELLOIDEA [Superfamily]  (Land)  - 298 Sp, 38 Var, 52 Img
  • SPIROCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-STEPHANOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 5 Img
  • SPIROLEGOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-NEOICOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 14 Sp, 0 Var, 0 Img
  • SPIROSTYLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]  (Sea)  (FOSSIL)  - 15 Sp, 0 Var, 0 Img
  • SPIRULIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-SPIRULIDA [Order]  (Sea)  - 2 Sp, 0 Var, 1 Img
  • SPIRULIROSTRIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-SPIRULIDA [Order]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 2 Img
  • SPONDYLIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-PECTINOIDEA [Superfamily]  (Sea)  - 156 Sp, 20 Var, 150 Img
  • SPORADOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-PRIONOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 77 Sp, 0 Var, 9 Img
  • SPORTELLIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-CYAMIOIDEA [Superfamily]  (Sea)  - 42 Sp, 0 Var, 18 Img
  • SPYROCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-PSEUDORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 58 Sp, 1 Var, 8 Img
  • STAFFORDIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-STAFFORDIOIDEA [Superfamily]  (Land)  - 3 Sp, 0 Var, 1 Img
  • STEINMANNITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-CLYDONITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 19 Sp, 0 Var, 0 Img
  • STENOGLAPHYRITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-SOMOHOLITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 31 Sp, 0 Var, 2 Img
  • STENOTHECIDAE  HELCIONELLOIDA Taxon Tree: ARCHAEOBRANCHIA [Subclass]-HELCIONELLIFORMES [Order]-YOCHELCIONELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 32 Sp, 0 Var, 9 Img
  • STENOTHECOIDA INCERTAE SEDIS  STENOTHECOIDA  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 0 Img
  • STENOTHYRIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TRUNCATELLOIDEA [Superfamily]  (Freshwater)  - 95 Sp, 8 Var, 20 Img
  • STEPHANITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-NORITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • STEPHANOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-STEPHANOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 55 Sp, 0 Var, 37 Img
  • STEREOPLASMOCERATIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-ORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 10 Sp, 0 Var, 7 Img
  • STOLIDOTIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-CYRTODONTIDA [Order]-DUALINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 4 Img
  • STRABIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-NUCULANIDA [Order]-NUCULANOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • STRAPAROLLINIDAE  GASTROPODA Taxon Tree: ORTHOGASTROPODA [Subclass]-MURCHISONIINA [Order]-STRAPAROLLINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 25 Sp, 0 Var, 5 Img
  • STREBLOCHONDRIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-CHAENOCARDIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 41 Sp, 0 Var, 8 Img
  • STREPSIDURIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-MURICOIDEA [Superfamily]  (Sea)  - 43 Sp, 0 Var, 26 Img
  • STREPTACIDIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-STREPTACIDOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 15 Sp, 0 Var, 2 Img
  • STREPTACIDOIDEA unassigned)  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-STREPTACIDOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 1 Img
  • STREPTAXIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-STREPTAXOIDEA [Superfamily]  (Land)  - 586 Sp, 15 Var, 216 Img
  • STRIATOSTYLIOLINIDAE  TENTACULITA Taxon Tree: DACRYOCONARIDA [Subclass]-NOWAKIIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • STRICTISPIRIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-CONOIDEA [Superfamily]  (Sea)  - 10 Sp, 0 Var, 9 Img
  • STRIGOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-HAPLOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 13 Sp, 0 Var, 12 Img
  • STROBEIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • STROBILEPIDAE  POLYPLACOPHORA Taxon Tree: MULTIPLACOPHORA [Subclass]-STROBILEPIDA [Order]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 2 Img
  • STROBILOPSIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ORCULOIDEA [Superfamily]  (Land)  - 42 Sp, 4 Var, 5 Img
  • STROMBIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-STROMBOIDEA [Superfamily]  (Sea)  - 225 Sp, 49 Var, 244 Img
  • STROMBOIDEA (unassigned)  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-STROMBOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • STROPHOCHEILIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-STROPHOCHEILOIDEA [Superfamily]  (Land)  - 43 Sp, 3 Var, 35 Img
  • STROPHOMENIIDAE  SOLENOGASTRES Taxon Tree: SOLENOGASTRES [Subclass]-CAVIBELONIA [Order]  (Sea)  - 14 Sp, 0 Var, 1 Img
  • STRUTHIOLARIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-STROMBOIDEA [Superfamily]  (Sea)  - 81 Sp, 2 Var, 47 Img
  • STUORAXIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-ARCHITECTONICOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 3 Img
  • STUORELLIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-PLEUROTOMARIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 17 Sp, 0 Var, 1 Img
  • STURIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-PTYCHITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 13 Sp, 0 Var, 0 Img
  • STYLIOLINIDAE  TENTACULITA Taxon Tree: DACRYOCONARIDA [Subclass]-STYLIOLINIDA [Order]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 4 Img
  • SUBULINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ACHATINOIDEA [Superfamily]  (Land)  - 461 Sp, 40 Var, 254 Img
  • SUBULITIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-SUBULITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 85 Sp, 7 Var, 30 Img
  • SUCCINEIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-SUCCINEOIDEA [Superfamily]  (Land)  - 264 Sp, 20 Var, 50 Img
  • SULCAVITIDAE  HYOLITHA Taxon Tree: SULCAVITIDA [Order]  (Sea)  (FOSSIL)  - 14 Sp, 0 Var, 0 Img
  • SUNDAITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-PROLECANITIDA [Order]-MEDLICOTTIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • SUTILIZONIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-LEPETODRILOIDEA [Superfamily]  (Sea)  - 6 Sp, 0 Var, 5 Img
  • SYMMETROCAPULIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-SYMMETROCAPULOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 1 Img
  • SYNGENOHERPIIDAE  SOLENOGASTRES Taxon Tree: SOLENOGASTRES [Subclass]-CAVIBELONIA [Order]  (Sea)  - 2 Sp, 0 Var, 1 Img
  • SYRINGONAUTILIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-TRIGONOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 22 Sp, 0 Var, 0 Img
  • TAINOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-TAINOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 188 Sp, 0 Var, 11 Img
  • TAIOMIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • TAMARITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-AGONIATITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • TAMESNELLIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-UNIONIDA [Order]-TAMESNELLOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 2 Sp, 0 Var, 2 Img
  • TANCREDIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-TELLINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 49 Sp, 1 Var, 19 Img
  • TANTULIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-ACOCHLIDIACEA [Order]-ACOCHLIDIOIDEA [Superfamily]  (Freshwater)  - 1 Sp, 0 Var, 0 Img
  • TAOUZITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-GEPHUROCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 12 Sp, 0 Var, 3 Img
  • TAPASHANITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-XENODISCOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 24 Sp, 0 Var, 0 Img
  • TARPHYCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-TARPHYCERIDA [Order]  (Sea)  (FOSSIL)  - 48 Sp, 1 Var, 0 Img
  • TARPHYCERIDA (unassigned)  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-TARPHYCERIDA [Order]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • TATEIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TRUNCATELLOIDEA [Superfamily]  (Freshwater)  - 82 Sp, 3 Var, 52 Img
  • TCHURANITHECIDAE  HYOLITHA Taxon Tree: ORTHOTHECIDA [Order]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 0 Img
  • TECHNOPHORIDAE  ROSTROCONCHIA Taxon Tree: RIBEIRIOIDA [Order]  (Sea)  (FOSSIL)  - 31 Sp, 0 Var, 15 Img
  • TEGULAEDONTIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-UNIONIDA [Order]  (Freshwater)  (FOSSIL)  - 3 Sp, 0 Var, 3 Img
  • TEGULIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-TROCHOIDEA [Superfamily]  (Sea)  - 110 Sp, 8 Var, 80 Img
  • TEICHERTICERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-AMIMOSPHINCTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 28 Sp, 0 Var, 3 Img
  • TELLINIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-TELLINOIDEA [Superfamily]  (Sea)  - 937 Sp, 29 Var, 461 Img
  • TEMERTASSETIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-PERICYCLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 12 Sp, 0 Var, 11 Img
  • TEMNOCHEILIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-TEMNOCHEILOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • TEMNOTROPIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-HALIOTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 2 Img
  • TENTACULITIDA (unassigned)  TENTACULITA Taxon Tree: TENTACULITIDA [Order]  (Sea)  (FOSSIL)  - 0 Sp, 0 Var, 0 Img
  • TENTACULITIDAE  TENTACULITA Taxon Tree: TENTACULITIDA [Order]  (Sea)  (FOSSIL)  - 12 Sp, 0 Var, 3 Img
  • TEREBRIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-CONOIDEA [Superfamily]  (Sea)  - 613 Sp, 30 Var, 454 Img
  • TEREDINIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MYIDA [Order]-PHOLADOIDEA [Superfamily]  (Sea)  - 121 Sp, 0 Var, 29 Img
  • TERQUEMIIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-PECTINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • TESTACELLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-TESTACELLOIDEA [Superfamily]  (Land)  - 9 Sp, 0 Var, 4 Img
  • TETHYDIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-TRITONIOIDEA [Superfamily]  (Sea)  - 28 Sp, 0 Var, 11 Img
  • TETRAGONITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-TETRAGONITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 34 Sp, 0 Var, 2 Img
  • TETRAGONOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-TAINOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • TETRATHECIDAE  HYOLITHA Taxon Tree: ORTHOTHECIDA [Order]  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 0 Img
  • TEUDOPSIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-LOLIGOSEPIIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 1 Img
  • TEUTHIDA (unassigned)  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-TEUTHIDA [Order]  (Sea)  (FOSSIL)  - 10 Sp, 0 Var, 2 Img
  • THALASSOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-THALASSOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 29 Sp, 0 Var, 0 Img
  • THAMBOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-STEPHANOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • THANAMITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-NATHORSTITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • THECOSOMATA (unassigned)  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-THECOSOMATA [Order]  (Sea)  (FOSSIL)  - 16 Sp, 0 Var, 1 Img
  • THERSITEIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-STROMBOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 16 Sp, 0 Var, 14 Img
  • THETIDITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-CLYDONITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 28 Sp, 0 Var, 0 Img
  • THIARIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Freshwater)  - 289 Sp, 28 Var, 124 Img
  • THISBITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-TROPITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 16 Sp, 0 Var, 0 Img
  • THORALIIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • THRACIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-THRACIOIDEA [Superfamily]  (Sea)  - 140 Sp, 0 Var, 61 Img
  • THRINCOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • THYASIRIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-LUCINIDA [Order]-THYASIROIDEA [Superfamily]  (Sea)  - 171 Sp, 3 Var, 55 Img
  • THYLACOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ENDOCERIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • THYROPHORELLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-PUNCTOIDEA [Superfamily]  (Land)  - 1 Sp, 0 Var, 1 Img
  • THYSANOPHORIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-POLYGYROIDEA [Superfamily]  (Land)  - 46 Sp, 2 Var, 7 Img
  • THYSANOTEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order]  (Sea)  - 3 Sp, 0 Var, 1 Img
  • TIBETITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-TRACHYCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 52 Sp, 0 Var, 0 Img
  • TINDARIIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-NUCULANIDA [Order]-NUCULANOIDEA [Superfamily]  (Sea)  - 27 Sp, 1 Var, 7 Img
  • TIROLITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-DINARITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 12 Sp, 0 Var, 1 Img
  • TIRONUCULIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-AFGHANODESMATIDA [Order]-TIRONUCULOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • TISSOTIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ACANTHOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 14 Sp, 0 Var, 6 Img
  • TITISCANIIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-NERITOPSOIDEA [Superfamily]  (Sea)  - 2 Sp, 0 Var, 2 Img
  • TJAERNOEIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-HETEROSTROPHA [Infraclass]  (Sea)  - 4 Sp, 0 Var, 3 Img
  • TOFANELLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-MATHILDOIDEA [Superfamily]  (Sea)  - 70 Sp, 0 Var, 23 Img
  • TONNIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TONNOIDEA [Superfamily]  (Sea)  - 52 Sp, 9 Var, 51 Img
  • TONNOIDEA (unassigned)  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TONNOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • TORNIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TRUNCATELLOIDEA [Superfamily]  (Sea)  - 719 Sp, 2 Var, 232 Img
  • TORNOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-TORNOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 116 Sp, 1 Var, 14 Img
  • TOSAPECTINIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-PECTINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 5 Var, 7 Img
  • TOXEUMORPHORIDAE  HYOLITHA Taxon Tree: TOXEUMORPHORIDA [Order]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • TRACHOECIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-STREPTACIDOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 3 Img
  • TRACHYCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-TRACHYCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 124 Sp, 0 Var, 2 Img
  • TRACHYSPIRIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]  (Sea)  (FOSSIL)  - 26 Sp, 0 Var, 4 Img
  • TRACHYTEUTHIDIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-LOLIGOSEPIIDA [Order]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 1 Img
  • TRAJANELLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-PSEUDOMELANIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • TRAPEZIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-ARCTICOIDEA [Superfamily]  (Sea)  - 41 Sp, 1 Var, 28 Img
  • TRAPEZOVITIDAE  HYOLITHA Taxon Tree: SULCAVITIDA [Order]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • TRECHMANNELLIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-HIPPURITIDA [Order]-RADIOLITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 2 Img
  • TREMOCTOPODIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-OCTOPODA [Order]-INCIRRATA [Suborder]-ARGONAUTOIDEA [Superfamily]  (Sea)  - 4 Sp, 0 Var, 4 Img
  • TRENELLIDAE  HELCIONELLOIDA Taxon Tree: ARCHAEOBRANCHIA [Subclass]-HELCIONELLIFORMES [Order]-YOCHELCIONELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 15 Sp, 0 Var, 6 Img
  • TRIAINOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-PHARCICERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 13 Sp, 0 Var, 4 Img
  • TRICOLNATICOPSIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-NERITOPSOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 5 Img
  • TRIDACNIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-CARDIOIDEA [Superfamily]  (Sea)  - 27 Sp, 1 Var, 18 Img
  • TRIGONIIDA (unassigned)  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]  (Sea)  (FOSSIL)  - 15 Sp, 0 Var, 0 Img
  • TRIGONIIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-TRIGONIOIDEA [Superfamily]  (Sea)  - 235 Sp, 6 Var, 38 Img
  • TRIGONIOIDIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-TRIGONIOIDOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 5 Sp, 0 Var, 1 Img
  • TRIGONOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-TRIGONOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 48 Sp, 0 Var, 11 Img
  • TRIGONOCHLAMYDIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-PARMACELLOIDEA [Superfamily]  (Land)  - 13 Sp, 0 Var, 3 Img
  • TRIGONODIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-TRIGONODOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 42 Sp, 1 Var, 6 Img
  • TRIMEROCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ONCOCERIDA [Order]  (Sea)  (FOSSIL)  - 8 Sp, 1 Var, 1 Img
  • TRIMUSCULIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-EUPULMONATA [Order]-TRIMUSCULOIDEA [Superfamily]  (Freshwater)  - 16 Sp, 0 Var, 12 Img
  • TRIPARTELLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-LITTORINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • TRIPHORIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-TRIPHOROIDEA [Superfamily]  (Sea)  - 686 Sp, 1 Var, 310 Img
  • TRIPLEUROCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ONCOCERIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 2 Img
  • TRIPTEROCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ORTHOCERIDA [Order]  (Sea)  (FOSSIL)  - 8 Sp, 0 Var, 1 Img
  • TRISSEXODONTIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-HYGROMIOIDEA [Superfamily]  (Land)  - 32 Sp, 1 Var, 22 Img
  • TRITONIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-TRITONIOIDEA [Superfamily]  (Sea)  - 90 Sp, 2 Var, 40 Img
  • TRIVIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-VELUTINOIDEA [Superfamily]  (Sea)  - 429 Sp, 9 Var, 254 Img
  • TROCHACLIDIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]  (Sea)  - 26 Sp, 0 Var, 14 Img
  • TROCHIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-TROCHOIDEA [Superfamily]  (Sea)  - 934 Sp, 78 Var, 603 Img
  • TROCHOLITIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-TARPHYCERIDA [Order]  (Sea)  (FOSSIL)  - 42 Sp, 0 Var, 2 Img
  • TROCHOMORPHIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-GASTRODONTOIDEA [Superfamily]  (Land)  - 98 Sp, 0 Var, 36 Img
  • TROCHONEMATIDAE  GASTROPODA Taxon Tree: ORTHOGASTROPODA [Subclass]-MURCHISONIINA [Order]-TROCHONEMATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 69 Sp, 0 Var, 23 Img
  • TROCHOTOMIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-PLEUROTOMARIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 25 Sp, 0 Var, 11 Img
  • TROEDSSONELLIDAE  CEPHALOPODA Taxon Tree: ORTHOCERATOIDEA [Subclass]-DISSIDOCERIDA [Order]  (Sea)  (FOSSIL)  - 10 Sp, 0 Var, 0 Img
  • TROPICELTITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-TROPITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 12 Sp, 0 Var, 0 Img
  • TROPIDODISCIDAE  GASTROPODA Taxon Tree: AMPHIGASTROPODA [Subclass]-BELLEROPHONTIDA [Order]-BELLEROPHONTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 134 Sp, 2 Var, 13 Img
  • TROPITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-TURRILITINA [Order]-TROPITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 82 Sp, 0 Var, 1 Img
  • TRUNCATELLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TRUNCATELLOIDEA [Superfamily]  (Sea)  - 80 Sp, 4 Var, 39 Img
  • TRYBLIDIIDAE  MONOPLACOPHORA Taxon Tree: TRYBLIDIIDA [Order]-TRYBLIDIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 61 Sp, 0 Var, 5 Img
  • TRYPANAXIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CAMPANILOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 10 Sp, 0 Var, 8 Img
  • TUARANGIIDAE  BIVALVIA Taxon Tree: TUARANGIIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • TUBIFERIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-ACTEONOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 13 Sp, 0 Var, 3 Img
  • TUBINIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-ORIOSTOMATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 10 Sp, 0 Var, 0 Img
  • TULITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-STEPHANOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 20 Sp, 0 Var, 16 Img
  • TURBINELLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-TURBINELLOIDEA [Superfamily]  (Sea)  - 216 Sp, 15 Var, 138 Img
  • TURBINIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-TROCHOIDEA [Superfamily]  (Sea)  - 397 Sp, 25 Var, 244 Img
  • TURCUTHECIDAE  HYOLITHA Taxon Tree: CIRCOTHECIDA [Order]  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 0 Img
  • TURMALITIDAE  TENTACULITA Taxon Tree: CHONIOCONARIDA [Subclass]-TROMPETOCONARIDA [Superorder]-VOLYNITIDA [Order]  (Sea)  (FOSSIL)  - 13 Sp, 0 Var, 0 Img
  • TURRIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-CONOIDEA [Superfamily]  (Sea)  - 529 Sp, 30 Var, 334 Img
  • TURRILITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-TURRILITINA [Order]-TURRILITOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 51 Sp, 1 Var, 20 Img
  • TURRITELLIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily]  (Sea)  - 751 Sp, 51 Var, 351 Img
  • TUSAYANIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MODIOMORPHIDA [Order]-MODIOMORPHOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • TYCHOBRAHEIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-TROCHOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 1 Img
  • TYLODINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-UMBRACULIDA [Order]-UMBRACULOIDEA [Superfamily]  (Sea)  - 9 Sp, 0 Var, 5 Img
  • TYLOSTOMATIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-STROMBOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 55 Sp, 0 Var, 22 Img
  • UCUMARIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-PHOLADOMYOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • UMBRACULIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-UMBRACULIDA [Order]-UMBRACULOIDEA [Superfamily]  (Sea)  - 11 Sp, 2 Var, 9 Img
  • UMBURRIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-OSTREIDA [Order]-RHOMBOPTERIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • UNDACYCLITIDAE  TENTACULITA Taxon Tree: CHONIOCONARIDA [Subclass]-TROMPETOCONARIDA [Superorder]-VOLYNITIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • UNDASTRIATOSTYLIOLINIDAE  TENTACULITA Taxon Tree: DACRYOCONARIDA [Subclass]-NOWAKIIDA [Order]  (Sea)  (FOSSIL)  - 9 Sp, 0 Var, 0 Img
  • UNGULINIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-UNGULINOIDEA [Superfamily]  (Sea)  - 191 Sp, 3 Var, 82 Img
  • UNICARDIOPSIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-TELLINOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 2 Img
  • UNICONIDAE  TENTACULITA Taxon Tree: TENTACULITIDA [Order]  (Sea)  (FOSSIL)  - 0 Sp, 0 Var, 0 Img
  • UNICONOCYCLITIDAE  TENTACULITA Taxon Tree: CHONIOCONARIDA [Subclass]-TROMPETOCONARIDA [Superorder]-UNICONOMORPHITIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • UNICONOMORPHITIDAE  TENTACULITA Taxon Tree: CHONIOCONARIDA [Subclass]-TROMPETOCONARIDA [Superorder]-UNICONOMORPHITIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • UNIDENTIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-AEOLIDIOIDEA [Superfamily]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • UNIONELLIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-UNIONIDA [Order]-SILESUNIONOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 2 Sp, 0 Var, 2 Img
  • UNIONIDA (unassigned)  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-UNIONIDA [Order]  (Freshwater)  (FOSSIL)  - 3 Sp, 0 Var, 1 Img
  • UNIONIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-UNIONIDA [Order]-UNIONOIDEA [Superfamily]  (Freshwater)  - 753 Sp, 102 Var, 737 Img
  • URANOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-BARRANDEOCERIDA [Order]  (Sea)  (FOSSIL)  - 7 Sp, 0 Var, 3 Img
  • UROCOPTIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ORTHALICOIDEA [Superfamily]  (Land)  - 976 Sp, 199 Var, 341 Img
  • UROCYCLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-HELICARIONOIDEA [Superfamily]  (Land)  - 205 Sp, 7 Var, 30 Img
  • USSURIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-MEEKOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 0 Img
  • USSURITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-PHYLLOCERATIDA [Order]-PHYLLOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 55 Sp, 0 Var, 2 Img
  • UTSCHAMIELLIDAE  BIVALVIA Taxon Tree: PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-PSEUDOCARDINIOIDEA [Superfamily]  (Freshwater)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • VACUNELLIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MYIDA [Order]-PLEUROMYOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 38 Sp, 0 Var, 2 Img
  • VALCOUROCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-ONCOCERIDA [Order]  (Sea)  (FOSSIL)  - 19 Sp, 0 Var, 2 Img
  • VALLONIIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ORCULOIDEA [Superfamily]  (Land)  - 60 Sp, 4 Var, 21 Img
  • VALVATIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-HETEROSTROPHA [Infraclass]-VALVATOIDEA [Superfamily]  (Freshwater)  - 225 Sp, 30 Var, 39 Img
  • VAMPYROMORPHA (unassigned)  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-VAMPYROMORPHA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 1 Img
  • VAMPYROTEUTHIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-VAMPYROMORPHA [Order]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • VANIKORIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-VANIKOROIDEA [Superfamily]  (Sea)  - 194 Sp, 2 Var, 79 Img
  • VASCOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ACANTHOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 57 Sp, 3 Var, 18 Img
  • VASSEURIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-SPIRULIDA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • VELAINELLIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-TROCHOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • VELUTINIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-VELUTINOIDEA [Superfamily]  (Sea)  - 113 Sp, 2 Var, 32 Img
  • VENERIDA (unassigned)  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]  (Sea)  (FOSSIL)  - 11 Sp, 0 Var, 2 Img
  • VENERIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-VENEROIDEA [Superfamily]  (Sea)  - 1623 Sp, 84 Var, 858 Img
  • VENIELLIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-ARCTICOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 4 Img
  • VERMETIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-VERMETOIDEA [Superfamily]  (Sea)  - 224 Sp, 10 Var, 117 Img
  • VERONICELLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-SYSTELLOMMATOPHORA [Order]-VERONICELLOIDEA [Superfamily]  (Land)  - 84 Sp, 1 Var, 17 Img
  • VERTICORDIIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-VERTICORDIOIDEA [Superfamily]  (Sea)  - 114 Sp, 0 Var, 39 Img
  • VERTIGINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-VERTIGINOIDEA [Superfamily]  (Land)  - 308 Sp, 53 Var, 82 Img
  • VESICOMYIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-GLOSSOIDEA [Superfamily]  (Sea)  - 123 Sp, 2 Var, 57 Img
  • VETIGASTROPODA (unassigned)  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]  (Sea)  - 1 Sp, 0 Var, 1 Img
  • VIDRIOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-CYCLOLOBOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 18 Sp, 0 Var, 1 Img
  • VIRIATELLIDAE  TENTACULITA Taxon Tree: DACRYOCONARIDA [Subclass]-STYLIOLINIDA [Order]  (Sea)  (FOSSIL)  - 22 Sp, 0 Var, 0 Img
  • VITRELEDONELLIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-OCTOPODA [Order]-INCIRRATA [Suborder]-OCTOPODOIDEA [Superfamily]  (Sea)  - 2 Sp, 0 Var, 1 Img
  • VITRINIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-LIMACOIDEA [Superfamily]  (Land)  - 85 Sp, 3 Var, 24 Img
  • VIVIPARIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-ARCHITAENIOGLOSSA [Order]-VIVIPAROIDEA [Superfamily]  (Freshwater)  - 508 Sp, 57 Var, 168 Img
  • VLASTIDAE  BIVALVIA Taxon Tree: PTERIOMORPHIA [Subclass]-PTERIIDA [Order]-PTERIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 20 Sp, 0 Var, 0 Img
  • VLTAVIELLIDAE  GASTROPODA Taxon Tree: NERITIMORPHA [Subclass]-CYRTONERITIMORPHA [Order]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 3 Img
  • VOEHRINGERITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-PRIONOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • VOLUTIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-MURICOIDEA [Superfamily]  (Sea)  - 789 Sp, 176 Var, 725 Img
  • VOLUTODERMATIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-SARGANOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 3 Sp, 0 Var, 0 Img
  • VOLUTOMITRIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-TURBINELLOIDEA [Superfamily]  (Sea)  - 110 Sp, 5 Var, 65 Img
  • VOLVATELLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-SACOGLOSSA [Order]-OXYNOACEA [Suborder]-OXYNOOIDEA [Superfamily]  (Sea)  - 27 Sp, 0 Var, 11 Img
  • VOLYNITIDAE  TENTACULITA Taxon Tree: CHONIOCONARIDA [Subclass]-TROMPETOCONARIDA [Superorder]-VOLYNITIDA [Order]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • WALLOWACONCHIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MEGALODONTIDA [Order]-MEGALODONTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • WEEKSIIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 1 Img
  • WELLERITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-SCHISTOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 6 Sp, 0 Var, 0 Img
  • WEMERSONIELLIDAE  SCAPHOPODA Taxon Tree: GADILIDA [Order]  (Sea)  - 6 Sp, 0 Var, 1 Img
  • WERNEROCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-ANARCESTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 26 Sp, 1 Var, 8 Img
  • WESTONOCERATIDAE  CEPHALOPODA Taxon Tree: NAUTILOIDEA [Subclass]-DISCOSORIDA [Order]  (Sea)  (FOSSIL)  - 54 Sp, 0 Var, 20 Img
  • WIEDEYOCERATIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-GONIATITIDA [Order]-GONIOLOBOCERATOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 4 Sp, 0 Var, 0 Img
  • WIWAXIIDAE  DIPLACOPHORA Taxon Tree: SACHITIDA [Order]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • WOCKLUMERIIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CLYMENIIDA [Order]-WOCKLUMERIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 11 Sp, 4 Var, 1 Img
  • WORTHENIELLIDAE  GASTROPODA Taxon Tree: ARCHAEOGASTROPODA [Subclass]-EOTOMARIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 17 Sp, 0 Var, 8 Img
  • XANTHONYCHIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-XANTHONYCHOIDEA [Superfamily]  (Land)  - 40 Sp, 13 Var, 4 Img
  • XENOCELTITIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-XENODISCOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 13 Sp, 0 Var, 0 Img
  • XENODISCIDAE  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-CERATITIDA [Order]-XENODISCOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 19 Sp, 0 Var, 1 Img
  • XENOPHORIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-XENOPHOROIDEA [Superfamily]  (Sea)  - 72 Sp, 14 Var, 64 Img
  • XIPHOTEUTHIDIDAE  CEPHALOPODA Taxon Tree: COLEOIDEA [Subclass]-AULACOCERIDA [Order]  (Sea)  (FOSSIL)  - 13 Sp, 0 Var, 1 Img
  • XYLODISCULIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-HETEROSTROPHA [Infraclass]-VALVATOIDEA [Superfamily]  (Sea)  - 10 Sp, 0 Var, 8 Img
  • XYLOPHAGAIDAE  BIVALVIA Taxon Tree: HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MYIDA [Order]-PHOLADOIDEA [Superfamily]  (Sea)  - 61 Sp, 0 Var, 23 Img
  • YANHECERIDA (unassigned)  CEPHALOPODA Taxon Tree: AMMONOIDEA [Subclass]-YANHECERIDA [Order]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 5 Img
  • YOCHELCIONELLIDAE  HELCIONELLOIDA Taxon Tree: ARCHAEOBRANCHIA [Subclass]-HELCIONELLIFORMES [Order]-YOCHELCIONELLOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 24 Sp, 0 Var, 4 Img
  • YOCHELSONIIDAE  GASTROPODA Taxon Tree: AMPHIGASTROPODA [Subclass]-BELLEROPHONTIDA [Order]-BELLEROPHONTOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 2 Sp, 0 Var, 0 Img
  • YOLDIIDAE  BIVALVIA Taxon Tree: PROTOBRANCHIA [Subclass]-NUCULANIDA [Order]-NUCULANOIDEA [Superfamily]  (Sea)  - 263 Sp, 4 Var, 81 Img
  • ZARDINELLIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-ACTEONOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 1 Sp, 0 Var, 0 Img
  • ZEBINIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-RISSOOIDEA [Superfamily]  (Sea)  - 219 Sp, 1 Var, 102 Img
  • ZEROTULIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-LITTORINOIDEA [Superfamily]  (Sea)  - 17 Sp, 0 Var, 8 Img
  • ZONITIDAE  GASTROPODA Taxon Tree: HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ZONITOIDEA [Superfamily]  (Land)  - 283 Sp, 28 Var, 72 Img
  • ZYGITIDAE  GASTROPODA Taxon Tree: VETIGASTROPODA [Subclass]-PLEUROTOMARIOIDEA [Superfamily]  (Sea)  (FOSSIL)  - 5 Sp, 0 Var, 0 Img
  • ZYGOPLEURIDAE  GASTROPODA Taxon Tree: CAENOGASTROPODA [Subclass]  (Sea)  (FOSSIL)  - 40 Sp, 1 Var, 3 Img

Author: Claudio Galli - last updated: 29/ago/2017