- academia, Hydrophrea academia F.M. Climo, 1970 - syn of: Lucilla singleyana (H.A. Pilsbry, 1889) - (HELICODISCIDAE)
- academica, Splendrillia academica J.H. McLean & L.H. Poorman, 1971 - (DRILLIIDAE)
- academica, Okenia academica Y. Camacho-García & T.M. Gosliner, 2004 - (GONIODORIDIDAE)
- academica, Turbonilla academica A.M. Strong & L.G. Hertlein, 1939 - (PYRAMIDELLIDAE)
- academicorum, Cerithiopsis academicorum E. Rolán & J. Espinosa, 1996 - (CERITHIOPSIDAE)
- academicus, Conus academicus Dall & Ochsner, 1928 † - (CONIDAE) (FOSSIL)
- acadiana, Retimohnia acadiana E.F. Garcia, 2008 - (BUCCINIDAE)
- acadianum, Conocardium acadianum Dawson, 1891 † - (CONOCARDIIDAE) (FOSSIL)
- acadica, Cephalaspis acadica R. Robertson, 1936 † - (CEPHALASPIDAE) (FOSSIL)
- Acado, syn of: Genus Umbraculum H.C.F. Schumacher, 1817 (UMBRACULIDAE)
- Acaenoplax, Genus Acaenoplax Sutton & al., 2001 (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- acalles, Bostryx acalles (L. Pfeiffer, 1853) - (BULIMULIDAE)
- acalles, Lissoacme acalles H.A. Pilsbry, 1896 - syn of: Bostryx acalles (L. Pfeiffer, 1853) - (BULIMULIDAE)
- acalles, Bulimus acalles L. Pfeiffer, 1853 - syn of: Bostryx acalles (L. Pfeiffer, 1853) - (BULIMULIDAE)
- acalypta, Cancellaria acalypta W.P. Woodring, 1970 † - (CANCELLARIIDAE) (FOSSIL)
- acalypta, Moerella acalypta W.H. Dall, 1900 † - (TELLINIDAE) (FOSSIL)
- acamatus, Naesiotus acamatus W.H. Dall, 1917 - syn of: Naesiotus akamatus (W.H. Dall, 1917) - (BULIMULIDAE)
- acampsica, Buliminus acampsica W.A. Lindholm, 1923 - syn of: Ljudmilena sieversi (A. Mousson, 1873) - (ENIDAE)
- acampsis, Schileykula trapezensis acampsis B. Hausdorf, 1996 - (ORCULIDAE)
- Acamptochetus, syn of: Genus Metula H. Adams & A. Adams, 1853 (BUCCINIDAE)
- Acamptodaphne, Genus Acamptodaphne T. Shuto, 1971 (RAPHITOMIDAE)
- Acamptogenotia, Genus Acamptogenotia G. Rovereto, 1899 (CLATHURELLIDAE) (FOSSIL)
- acanikos, Lindapecten acanikos (Gardner, 1926 †) - (PECTINIDAE) (FOSSIL)
- Acanomyphoria, Genus Acanomyphoria Guo Fu-xiang, 1985 (MYOPHORIIDAE) (FOSSIL)
- acanonica, Otala acanonica J.R. Bourguignat in J. Péchaud, 1883 - syn of: Otala punctata (O.F. Müller, 1774) - (HELICIDAE)
- acantha, Ihungia acantha J. Marwick, 1965 † - (RISSOIDAE) (FOSSIL)
- Acanthaecites, Genus Acanthaecites Rollier, 1909 (OPPELIIDAE) (FOSSIL)
- Acanthais, Genus Acanthais G.J. Vermeij & H.H. Kool, 1994 (MURICIDAE)
- acanthanodus, Planolateralus acanthanodus J. Wild & J.D. Stilwell, 2016 † - (CALLIOTROPIDAE) (FOSSIL)
- Acantharion, Genus Acantharion E.E. Binder & S. Tillier, 1983 (UROCYCLIDAE)
- Acantheledone, syn of: Genus Eledone W.E. Leach, 1817 (OCTOPODIDAE)
- acanthellum, Micracanthoceras acanthellum Imlay, 1939 † - (HIMALAYITIDAE) (FOSSIL)
- Acanthenna, Genus Acanthenna E.C. Von Martens, 1898 (STREPTAXIDAE)
- Acanthennea, Genus Acanthennea E.C. Von Martens, 1898 (STREPTAXIDAE)
- acanthica, Angaria alta acanthica W.H. Hudleston † - (ANGARIIDAE) (FOSSIL)
- acanthica, Annuliconcha acanthica (C. Gemmellaro, 1896 †) - (ANNULICONCHIDAE) (FOSSIL)
- acanthica, Melanopsis acanthica M. von Neumayr, 1869 † - (MELANOPSIDAE) (FOSSIL)
- acanthica, Acanthotrophia acanthica L.F. Conti & Fischer, 1981 † - (OPISTHOBRANCHIA (unassigned)) (FOSSIL)
- acanthicoides, Melanopsis acanthicoides R. Hoernes, 1876 † - (MELANOPSIDAE) (FOSSIL)
- acanthicula, Melanopsis acanthicula J.R. Bourguignat, 1880 † - (MELANOPSIDAE) (FOSSIL)
- acanthicum, Trachyspira acanthicum C. Gemmellaro, 1889 † - (TRACHYSPIRIDAE) (FOSSIL)
- acanthicus, Aviculopecten acanthicus C. Gemmellaro, 1896 † - syn of: Annuliconcha acanthica (C. Gemmellaro, 1896 †) - (AVICULOPECTINIDAE) (FOSSIL)
- acanthicus, Durangites acanthicus Burckhardt, 1912 † - (HIMALAYITIDAE) (FOSSIL)
- acanthicus, Nautilus acanthicus Tzwetaev, 1888 † - syn of: Temnocheiloides acanthicus (Tzwetaev, 1888 †) - (NAUTILIDAE) (FOSSIL)
- acanthicus, Temnocheiloides acanthicus (Tzwetaev, 1888 †) - (TEMNOCHEILIDAE) (FOSSIL)
- acanthidia, Holospira acanthidia F.G. Thompson & E.L. Mihalcik, 2005 - (UROCOPTIDAE)
- acanthina, Melongena acanthina Dalton, 1908 † - (MELONGENIDAE) (FOSSIL)
- Acanthina, Genus Acanthina G. Fischer von Waldheim, 1807 (MURICIDAE)
- acanthina, Thiara acanthina I. Lea, 1850 - (THIARIDAE)
- Acanthinites, Genus Acanthinites Mojsisovics , 1893 (TIBETITIDAE) (FOSSIL)
- Acanthinucella, Subgenus Acanthina (Acanthinucella) C.M. Cooke, 1918 (MURICIDAE)
- acanthinula, Pupa acanthinula C.M.F. Ancey, 1892 - syn of: Negulus acanthinula (C.M.F. Ancey, 1892) - (ACTEONIDAE)
- Acanthinula, Genus Acanthinula H.H. Beck, 1847 (VALLONIIDAE)
- acanthinula, Negulus acanthinula (C.M.F. Ancey, 1892) - (VERTIGINIDAE)
- acanthinulopsis, Phrixgnathus acanthinulopsis H.H. Suter, 1891 - (PUNCTIDAE)
- Acanthocardia, Genus Acanthocardia J.E. Gray, 1851 (CARDIIDAE)
- Acanthoceras, Genus Acanthoceras Neumayr , 1875 (ACANTHOCERATIDAE) (FOSSIL)
- ACANTHOCERATIDAE Grossouvre, 1894 - Family (CEPHALOPODA-AMMONOIDEA-AMMONITIDA) (FOSSIL)
- Acanthoceratites, Genus Acanthoceratites Schrammen, 1928 (CERATITIDAE) (FOSSIL)
- Acanthochaetes, syn of: Genus Acanthochitona J.E. Gray, 1821 (ACANTHOCHITONIDAE)
- Acanthochetes, syn of: Genus Acanthochitona J.E. Gray, 1821 (ACANTHOCHITONIDAE)
- Acanthochila, syn of: Genus Cadlina L.S.R. Bergh, 1878 (CADLINIDAE)
- Acanthochites, syn of: Genus Acanthochitona J.E. Gray, 1821 (ACANTHOCHITONIDAE)
- Acanthochiton, syn of: Genus Acanthochitona J.E. Gray, 1821 (ACANTHOCHITONIDAE)
- Acanthochitona, Genus Acanthochitona J.E. Gray, 1821 (ACANTHOCHITONIDAE)
- ACANTHOCHITONIDAE Pilsbry, 1893 - Family (POLYPLACOPHORA-NEOLORICATA-CHITONIDA-ACANTHOCHITONINA)
- Acanthoclymenia, Genus Acanthoclymenia Hyatt , 1900 (ACANTHOCLYMENIIDAE) (FOSSIL)
- ACANTHOCLYMENIIDAE Schindewolf, 1955 - Family (CEPHALOPODA-AMMONOIDEA-AGONIATITIDA) (FOSSIL)
- Acanthodaphne, Genus Acanthodaphne A. Bonfitto & M. Morassi, 2006 (RAPHITOMIDAE)
- acanthoderma, Asperoteuthis acanthoderma (C.C. Lu, 1977) - (CHIROTEUTHIDAE)
- acanthodes, Euaspidoceras acanthodes (Spath †) - (ASPIDOCERATIDAE) (FOSSIL)
- acanthodes, Fasciculicardia acanthodes (H.H. Suter, 1917 †) - (CARDITIDAE) (FOSSIL)
- acanthodes, Kurtziella acanthodes (R.B. Watson, 1881) - (MANGELIIDAE)
- acanthodes, Coronium acanthodes (R.B. Watson, 1882) - (MURICIDAE)
- acanthodes, Aequipecten acanthodes W.H. Dall, 1925 - syn of: Lindapecten exasperatus (G.B. II Sowerby, 1842) - (PECTINIDAE)
- acanthodes, Carenzia acanthodes B.A. Marshall, 1991 - (SEGUENZIIDAE)
- acanthodes, Sonninia acanthodes Buckman † - (SONNINIIDAE) (FOSSIL)
- Acanthodiscus, Genus Acanthodiscus Uhlig , 1905 (NEOCOMITIDAE) (FOSSIL)
- Acanthodoris, Genus Acanthodoris J.E. Gray, 1850 (ONCHIDORIDIDAE)
- Acanthodrepanites, Genus Acanthodrepanites Tozer , 1994 (TIBETITIDAE) (FOSSIL)
- Acanthohoplites, Genus Acanthohoplites Sinzow , 1908 (DESHAYESITIDAE) (FOSSIL)
- acanthoides, Ammonites acanthoides Reynes, 1868 † - syn of: Reynesoceras ragazzoni (J. Von Hauer, 1861 †) - (AMMONITIDA (unassigned)) (FOSSIL)
- acanthoides, Reynesoceras acanthoides J. Von Hauer, 1861 † - syn of: Reynesoceras ragazzoni (J. Von Hauer, 1861 †) - (DACTYLIOCERATIDAE) (FOSSIL)
- acanthoides, Aequipecten acanthoides W.H. Dall, 1925 - syn of: Lindapecten exasperatus (G.B. II Sowerby, 1842) - (PECTINIDAE)
- Acantholabia, Genus Acantholabia Petuch, 1991 (MURICIDAE) (FOSSIL)
- Acantholytoceras, Genus Acantholytoceras Spath , 1932 (MACROSCAPHITIDAE) (FOSSIL)
- Acanthomenia, Genus Acanthomenia K.H.J. Thiele, 1913 (ACANTHOMENIIDAE)
- ACANTHOMENIIDAE Salvini-Plawen, 1978 - Family (SOLENOGASTRES-CAVIBELONIA)
- Acanthonautilus, Genus Acanthonautilus Foord, 1896 (SOLENOCHILIDAE) (FOSSIL)
- Acanthonema, Genus Acanthonema Sherzer & Grabau, 1910 (EUOMPHALIDAE) (FOSSIL)
- ACANTHONEMATIDAE Wenz, 1938 - Family (GASTROPODA-CAENOGASTROPODA) (FOSSIL)
- acanthonotus, Ammonites acanthonotus Seeley, 1865 † - syn of: Callihoplites tetragonus Seeley, 1865 † - (AMMONITIDA (unassigned)) (FOSSIL)
- acanthonotus, Callihoplites acanthonotus (Seeley, 1865 †) - (HOPLITIDAE) (FOSSIL)
- Acanthopecten, Genus Acanthopecten Girty, 1903 (LIMIPECTINIDAE) (FOSSIL)
- Acanthophaedusa, Genus Acanthophaedusa H. Nordsieck, 2007 (CLAUSILIIDAE)
- Acanthophiceras, syn of: Genus Ophiceras Smith, 1932 (DIENEROCERATIDAE) (FOSSIL)
- acanthophora, Ocenebra acanthophora (A. Adams, 1863) - (MURICIDAE)
- acanthophora, Turritella acanthophora Müller 1851 - (TURRITELLIDAE)
- acanthophorea, Coelocentrum acanthophorea E.C. Von Martens, 1901 - syn of: Ptychodonta astrophorea (W.H. Dall, 1897) - (UROCOPTIDAE)
- acanthophorus, Amoebites acanthophorus Buckman, 1925 † - syn of: Amoebites kitchini (Salfeld, 1915 †) - (CARDIOCERATIDAE) (FOSSIL)
- acanthophorus endermonensis, Murex acanthophorus endermonensis G.B. Sowerby, 1879 - syn of: Ocenebra acanthophora (A. Adams, 1863) - (MURICIDAE)
- Acanthopleura, Genus Acanthopleura L. Guilding, 1829 (CHITONIDAE)
- Acanthopleuroceras, Genus Acanthopleuroceras Hyatt , 1900 (POLYMORPHITIDAE) (FOSSIL)
- acanthopleurum, Epitonium acanthopleurum (J.C. Verco, 1906) - (EPITONIIDAE)
- Acanthoplites, syn of: Genus Acanthohoplites Sinzow , 1908 (DESHAYESITIDAE) (FOSSIL)
- Acanthopsole, syn of: Genus Facelina J. Alder & A. Hancock, 1855 (FACELINIDAE)
- acanthopterus, Pterochelus acanthopterus (J.B.P.A. Lamarck, 1816) - (MURICIDAE)
- acanthopterus, Typhis acanthopterus R. Tate, 1888 † - (MURICIDAE) (FOSSIL)
- acanthopterus saibaiensis, Pterochelus acanthopterus saibaiensis (J.C. Melvill & R. Standen, 1899) - (MURICIDAE)
- Acanthoptychoceras, Genus Acanthoptychoceras Manolov , 1962 (ANCYLOCERATIDAE) (FOSSIL)
- Acanthoptyx, Genus Acanthoptyx C.M.F. Ancey, 1888 (ENDODONTIDAE)
- Acanthopupa, Genus Acanthopupa Wenz, 1914 (VALLONIIDAE) (FOSSIL)
- acanthorhinum, Phyllodesmium acanthorhinum Moore & T.M. Gosliner, 2014 - (FACELINIDAE)
- Acanthoscaphites, Genus Acanthoscaphites Coryell & Salmon, 1934 (SCAPHITIDAE) (FOSSIL)
- Acanthosepia, syn of: Subgenus Sepia (Acanthosepion) A. de Rochebrune, 1884 (SEPIIDAE)
- Acanthosepion, Subgenus Sepia (Acanthosepion) A. de Rochebrune, 1884 (SEPIIDAE)
- acanthospira, Strombus acanthospira B.M. Landau & al., 2011 † - (STROMBIDAE) (FOSSIL)
- acanthostephes, Fusus acanthostephes R. Tate, 1888 † - syn of: Columbarium acanthostephes (R. Tate, 1888 †) - (FASCIOLARIIDAE) (FOSSIL)
- acanthostephes, Murex acanthostephes R.B. Watson, 1883 - (MURICIDAE)
- acanthostephes, Columbarium acanthostephes (R. Tate, 1888 †) - (TURBINELLIDAE) (FOSSIL)
- Acanthostrophia, syn of: Genus Acanthotrophia Conti & Fischer, 1981 (OPISTHOBRANCHIA (unassigned)) (FOSSIL)
- Acanthoteuthis, Genus Acanthoteuthis Wagner in Mόnster, 1839 (BELEMNITIDA (unassigned)) (FOSSIL)
- Acanthotheca, Genus Acanthotheca Vendrasco & al., 2011 (STENOTHECIDAE) (FOSSIL)
- Acanthothetidites, Genus Acanthothetidites Tatzreiter , 1980 (THETIDITIDAE) (FOSSIL)
- Acanthotrigionia, syn of: Subgenus Pterotrigonia (Acanthotrigonia) van Hoepen, 1929 (PTEROTRIGONIIDAE) (FOSSIL)
- Acanthotrigonia, Subgenus Pterotrigonia (Acanthotrigonia) van Hoepen, 1929 (PTEROTRIGONIIDAE) (FOSSIL)
- Acanthotrophia, Genus Acanthotrophia Conti & Fischer, 1981 (OPISTHOBRANCHIA (unassigned)) (FOSSIL)
- Acanthotrophon, Genus Acanthotrophon L.G. Hertlein & A. Strong, 1951 (MURICIDAE)
- Acanthotropis, syn of: Genus Devononerita Blodgett & Frύda, 1999 (NERITOPSIDAE) (FOSSIL)
- Acanthotropites, Genus Acanthotropites Tozer, 1994 (TROPITIDAE) (FOSSIL)
- Acanthoxenophora, Genus Acanthoxenophora Perrilliat & Vega, 2001 (XENOPHORIDAE) (FOSSIL)
- Acanthozostera, syn of: Genus Acanthopleura L. Guilding, 1829 (CHITONIDAE)
- acanthula, Euphaedusa loczyi acanthula (P.M. Heude, 1882) - (CLAUSILIIDAE)
- acanthus, Mirachelus acanthus J.F. Quinn, 1991 - (CHILODONTIDAE)
- acanthus, Guizhoupecten acanthus W.C. Zhou, 1977 † - (STREBLOCHONDRIIDAE) (FOSSIL)
- acanthyllis, Hemiliostraca acanthyllis (R.B. Watson, 1883) - (EULIMIDAE)
- acanticum, Eucycloscala acanticum (Uhlig, 1881 †) - (EUCYCLOSCALIDAE) (FOSSIL)
- Acaphis, syn of: Genus Asaphis Modeer, 1793 (PSAMMOBIIDAE)
- acapulcana, Drillia acapulcana (H.N. Lowe, 1935) - (DRILLIIDAE)
- acapulcana, Hindsia acapulcana H.A. Pilsbry & H.N. Lowe, 1932 - syn of: Trajana perideris (W.H. Dall, 1910) - (NASSARIIDAE)
- acapulcanum, Epitonium acapulcanum W.H. Dall, 1917 - (EPITONIIDAE)
- acapulcanum, Miraclathurella acapulcanum H.A. Pilsbry & H.N. Lowe, 1932 - syn of: Miraclathurella bicanalifera (G.B. I Sowerby, 1834) - (PSEUDOMELATOMIDAE)
- acapulcensis, Saccella acapulcensis (H.A. Pilsbry & H.N. Lowe, 1932) - (NUCULANIDAE)
- acapulcensis, Nucula acapulcensis H.A. Pilsbry & H.N. Lowe, 1932 - syn of: Saccella acapulcensis (H.A. Pilsbry & H.N. Lowe, 1932) - (NUCULIDAE)
- Acar, Genus Acar J.E. Gray, 1857 (ARCIDAE)
- acardo, Arcicardium acardo G.P. Deshayes, 1838 † - (BIVALVIA INCERTAE SEDIS) (FOSSIL)
- Acardo, syn of: Genus Serripes A. Gould, 1841 (CARDIIDAE)
- acares, Litozamia acares R. Houart, 2013 - (MURICIDAE)
- acares, Arcopagia acares W.P. Woodring, 1982 † - (TELLINIDAE) (FOSSIL)
- acaria, Agladrillia acaria (W.C. Mansfield, 1925 †) - (DRILLIIDAE) (FOSSIL)
- acarinata, Discohelix acarinata J. Szabo, 1979 † - (DISCOHELICIDAE) (FOSSIL)
- acarinata, Geomitra acarinata J. Hemmen & K. Groh, 1985 - (HYGROMIIDAE)
- acarinata, Palaeoneilo acarinata G.B. Campbell & H. Engel, 1963 † - (MALLETIIDAE) (FOSSIL)
- acarinata, Quadratojaworskiella acarinata A.M. Pérez & al., 2008 † - (TRIGONIIDAE) (FOSSIL)
- acarinatoconica, Niso acarinatoconica F. Sacco, 1892 † - syn of: Niso terebellum acarinatoconicum F. Sacco, 1892 † - (EULIMIDAE) (FOSSIL)
- acarinatoconicum, Niso terebellum acarinatoconicum F. Sacco, 1892 † - (EULIMIDAE) (FOSSIL)
- acarinatus, Pyrgulopsis acarinatus (R. Hershler, 1985) - (HYDROBIIDAE)
- acaris, Pleuromeris acaris W.H. Dall, 1903 † - (CARDITIDAE) (FOSSIL)
- acarnanica, Codringtonia acarnanica (W. Kobelt, 1902) - (HELICIDAE)
- acarnanica, Josephinella conemenosi acarnanica (W. Kobelt, 1892) - (HELICIDAE)
- acarnanica, Prososthenia acarnanica Schütt, 1986 † - (HYDROBIIDAE) (FOSSIL)
- acarnicum, Hildoceras acarnicum † - (HILDOCERATIDAE) (FOSSIL)
- Acaroceras, Genus Acaroceras Chen & al, 1979 (ACAROCERATIDAE) (FOSSIL)
- ACAROCERATIDAE Chen & al., 1979 - Family (CEPHALOPODA-NAUTILOIDEA-ELLESMEROCERIDA) (FOSSIL)
- acarus, Gastrocopta acarus (W.H. Benson, 1856) - (VERTIGINIDAE)
- acatlana, Purpuroidea acatlana Alencaster & Buitron, 1965 † - (PURPUROIDEIDAE) (FOSSIL)
- acauda, Aegires acauda J.A. Ortea, L. Moro & J. Espinosa, 2015 - (AEGIRIDAE)
- acaulis, Peristernia acaulis Martin, 1895 † - (FASCIOLARIIDAE) (FOSSIL)
- ACAVIDAE Pilsbry, 1894 - Family (GASTROPODA-HETEROBRANCHIA-PULMONATA-STYLOMMATOPHORA)
- Acavus, Genus Acavus P.D. Montfort, 1810 (ACAVIDAE)
- Accardia, syn of: Genus Hammatoceras Unknown (HAMMATOCERATIDAE) (FOSSIL)
- accedens, Herilla ziegleri accedens (O.F. von Möllendorff, 1873) - (CLAUSILIIDAE)
- accedens, Gomphoceras accedens Barrande, 1865 † - syn of: Umbeloceras accedens (Barrande, 1865 †) - (DIESTOCERATIDAE) (FOSSIL)
- accedens, Umbeloceras accedens (Barrande, 1865 †) - (MANDALOCERATIDAE) (FOSSIL)
- accelerans, Probeloceras accelerans (A.H. Clarke, 1899 †) - (ACANTHOCLYMENIIDAE) (FOSSIL)
- accelerans, Manticoceras accelerans A.H. Clarke, 1899 † - syn of: Probeloceras accelerans (A.H. Clarke, 1899 †) - (GEPHUROCERATIDAE) (FOSSIL)
- accelerans, Eurystomites accelerans Ruedemann, 1906 † - (TARPHYCERATIDAE) (FOSSIL)
- accelerans, Vanikoro accelerans (J. Marwick, 1928 †) - (VANIKORIDAE) (FOSSIL)
- accelerata, Flammocharopa accelerata (F.M. Climo, 1970) - (CHAROPIDAE)
- accelerata, Charopa accelerata F.M. Climo, 1970 - syn of: Flammocharopa accelerata (F.M. Climo, 1970) - (CHAROPIDAE)
- acceleratum, Metoicoceras acceleratum A. Hyatt, 1903 † - syn of: Metoicoceras gibbosum A. Hyatt, 1903 † - (ACANTHOCERATIDAE) (FOSSIL)
- accentuata, Myonia accentuata E.M. Fletcher, 1932 † - syn of: Myonia elongata J.B.M. Dana, 1847 † - (VACUNELLIDAE) (FOSSIL)
- accepta, Kaliella accepta (E.A. Smith, 1895) - (CHRONIDAE)
- accepta, Fonscochlea accepta W.F. Ponder, R. Hershler & B.W. Jenkins, 1989 - (HYDROBIIDAE)
- acceptans, Pagodula acceptans (K.H. Barnard, 1959) - (MURICIDAE)
- acceptoria, Strophiops acceptoria C.J. Maynard, 1913 - (CERIONIDAE)
- accesa, Eulimella accesa A. Peñas & E. Rolán, 2016 - (PYRAMIDELLIDAE)
- accessa, Biloclymenia accessa Czarnocki, 1989 † - (BILOCLYMENIIDAE) (FOSSIL)
- accessa, Haliris accessa (T. Iredale, 1930) - (VERTICORDIIDAE)
- accidentalis, Pleurobranchaea accidentalis L.S.R. Bergh, 1897 - (PLEUROBRANCHAEIDAE)
- Accidenticulabrum, Genus Accidenticulabrum Vermeij , 2000 (BUCCINIDAE) (FOSSIL)
- accincta, Achatinella accincta A.A. Gould - syn of: Leptachatina ventulus (A.E.J. Férussac, 1825) - (ACHATINELLIDAE)
- accincta, Achatina accincta J.W. Mighels, 1845 - syn of: Leptachatina accincta (J.W. Mighels, 1845) - (ACHATINIDAE)
- accincta, Achatina accincta L.A. Reeve - syn of: Leptachatina sandwicensis (L. Pfeiffer, 1846) - (ACHATINIDAE)
- accincta, Leptachatina accincta (J.W. Mighels, 1845) - (AMASTRIDAE)
- accincta, Mitra accincta G.B. III Sowerby, 1907 - syn of: Pusia accinctum (G.B. III Sowerby, 1907) - (MITRIDAE)
- accincta, Callista accincta A. Römer, 1864 - (VENERIDAE)
- accinctum, Pusia accinctum (G.B. III Sowerby, 1907) - (COSTELLARIIDAE)
- accinctus, Kurtziella accinctus (G. Montagu, 1808) - (MANGELIIDAE)
- accinctus, Murex accinctus I. von Born, 1778 - syn of: Pisania pusio (C. Linnaeus, 1758) - (MURICIDAE)
- accipiter, Strombus accipiter L.W. Dillwyn, 1817 - syn of: Lobatus costatus (J.F. Gmelin, 1791) - (STROMBIDAE)
- accipiter, Tricornis accipiter L.W. Dillwyn, 1817 - syn of: Lobatus costatus (J.F. Gmelin, 1791) - (STROMBIDAE)
- accipitrina, Tricornis accipitrina P.F. Röding, 1798 - syn of: Lobatus costatus (J.F. Gmelin, 1791) - (STROMBIDAE)
- accipitrina, Lambis accipitrina P.F. Röding, 1798 - syn of: Lobatus costatus (J.F. Gmelin, 1791) - (STROMBIDAE)
- accipitris, Cheltonia accipitris (Buckman 1904 †) - (OXYNOTICERATIDAE) (FOSSIL)
- acciptris, Cheltonia acciptris Buckman, 1923 † - (OXYNOTICERATIDAE) (FOSSIL)
- accisa, Colpospira accisa (Watson, 1881) - (TURRITELLIDAE)
- acclinis, Limea acclinis C. Hedley, 1905 - syn of: Escalima murrayi (E.A. Smith, 1891) - (LIMIDAE)
- acclinis, Diplodonta acclinis T.A. Conrad, 1832 † - (UNGULINIDAE) (FOSSIL)
- acclivicallis, Euclathurella acclivicallis J.H. McLean & L.H. Poorman, 1971 - (CLATHURELLIDAE)
- acclivicosta, Bellaspira acclivicosta J.H. McLean & L.H. Poorman, 1970 - (DRILLIIDAE)
- acclivis, Septa acclivis F.W. Hutton, 1873 - syn of: Monoplex parthenopeus (C.U.A. von Salis-Marschlins, 1793) - (RANELLIDAE)
- acclivis, Monoplex acclivis F.W. Hutton, 1873 - syn of: Monoplex parthenopeus (C.U.A. von Salis-Marschlins, 1793) - (RANELLIDAE)
- accola, Persicula accola (B. Roth & E.V. Coan, 1968) - (CYSTISCIDAE)
- accola, Candidula accola A. Mousson, 1872 - syn of: Candidula ultima (A. Mousson, 1872) - (HYGROMIIDAE)
- accola, Marginella accola B. Roth & E.V. Coan, 1968 - syn of: Persicula accola (B. Roth & E.V. Coan, 1968) - (MARGINELLIDAE)
- accola, Phragmocerina accola (Ruedemann †) - (PHRAGMOCERATIDAE) (FOSSIL)
- accola, Archierato accola (C.R. Laws, 1935 †) - (TRIVIIDAE) (FOSSIL)
- accola, Temnodiscus accola E.F.R.K. Koken, 1896 † - (TROPIDODISCIDAE) (FOSSIL)
- accola, Bialasmus accola C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- accolorata, Katostoma accolorata R.T. Lowe, 1855 - syn of: Leptaxis nivosa (G.B. I Sowerby, 1824) - (HYGROMIIDAE)
- accordionata, Latouchella accordionata Runnegar & Jell, 1976 † - (COREOSPIRIDAE) (FOSSIL)
- accrensis, Hydrobia accrensis M. Connolly, 1929 - (HYDROBIIDAE)
- accrensis, Onchidella accrensis (H.P. Plate, 1893) - (ONCHIDIIDAE)
- accrescens, Aegista accrescens P.M. Heude, 1882 - (BRADYBAENIDAE)
- accrescens, Cerithioderma accrescens R. Tate, 1890 † - (CAPULIDAE) (FOSSIL)
- accresta, Maricarmenia accresta A. Peñas & E. Rolán, 2017 - (PYRAMIDELLIDAE)
- accretum, Procerithium accretum Yamnichenko, 1987 † - syn of: Cryptaulax protortile L.R. Cox, 1965 † - (PROCERITHIIDAE) (FOSSIL)
- acculta, Spissatella acculta Finlay, 1926 † - (CRASSATELLIDAE) (FOSSIL)
- accuminata, Cominella quoyana accuminata (F.W. Hutton, 1893) - (BUCCINIDAE)
- accuminator, Strophiops accuminator C.J. Maynard & W.F. Clapp, 1920 - (CERIONIDAE)
- accuratum, Leptaleoceras accuratum Fucini, 1931 † - (HILDOCERATIDAE) (FOSSIL)
- accuratum, Parasphaerorthoceras accuratum Ristedt, 1968 † - (SPHAERORTHOCERATIDAE) (FOSSIL)
- acehensis, Oospira acehensis B. Dharma & M. Szekeres, 2009 - (CLAUSILIIDAE)
- acelidotus, Ischnochiton acelidotus W.H. Dall, 1919 - syn of: Callochiton puniceus (A.A. Gould, 1846) - (ISCHNOCHITONIDAE)
- Acella, Genus Acella S.S. Haldeman, 1841 (LYMNAEIDAE)
- acentrophala, Candidula acentrophala G. Servain, 1880 - syn of: Candidula gigaxii (L. Pfeiffer, 1850) - (HYGROMIIDAE)
- acer, Turbonilla acer (C.R. Laws, 1937) - (PYRAMIDELLIDAE)
- Acera, syn of: Genus Akera O.F. Mόller, 1776 (AKERIDAE)
- aceraea, Barbatia aceraea J.C. Melvill & R. Standen, 1899 - syn of: Mulinarca aceraea (J.C. Melvill & R. Standen, 1899) - (ARCIDAE)
- aceraea, Mulinarca aceraea (J.C. Melvill & R. Standen, 1899) - (NOETIIDAE)
- acerapex, Leptotrophon acerapex (R. Houart, 1986) - (MURICIDAE)
- Aceras, syn of: Genus Akera O.F. Mόller, 1776 (AKERIDAE)
- acerbulum, Cyclostoma acerbulum P.M.A. Morelet, 1851 - syn of: Chondropomium rubicundum (P.M.A. Morelet, 1849) - (POMATIIDAE)
- acerbum, Granulomelon acerbum G.A. Solem, 1993 - (CAMAENIDAE)
- acerbum, Plagiostomoceras acerbum P.A. Zhuravleva, 2006 † - (SPHAERORTHOCERATIDAE) (FOSSIL)
- ACERIDAE - syn of Family: AKERIDAE
- aceroides, Crussoliceras aceroides D. Geyer, 1961 † - (AMMONOIDEA (unassigned)) (FOSSIL)
- acerosa, Rissoa acerosa T.A. de M. Monterosato in L. Seguenza, 1903 - syn of: Rissoa mirabilis A. Manzoni, 1868 - (RISSOIDAE)
- acerosus, Viviparus acerosus J.R. Bourguignat, 1862 - (VIVIPARIDAE)
- acerosus maritzanus, Viviparus acerosus maritzanus F. Haas, 1913 - syn of: Viviparus ater maritzanus (F. Haas, 1913) - (VIVIPARIDAE)
- acerra, Ventridens acerra J. Lewis, 1870 - (GASTRODONTIDAE)
- acerrima, Eulima acerrima R.B. Watson, 1883 - (EULIMIDAE)
- acerrima, Syrnola acerrima R.B. Watson, 1886 - (PYRAMIDELLIDAE)
- acerva, Tahunacca acerva (C.R. Laws, 1933 †) - (NATICIDAE) (FOSSIL)
- acervata, Annularops coronadoi acervata (R. Arango, 1881) - (POMATIIDAE)
- acervatus, Drymaeus acervatus L. Pfeiffer, 1857 - (BULIMULIDAE)
- acervatus, Inquisitor acervatus B.C. Cotton, 1947 - (PSEUDOMELATOMIDAE)
- acervatus balteatus, Drymaeus acervatus balteatus H.A. Pilsbry, 1898 - (BULIMULIDAE)
- acervatus paucipunctus, Drymaeus acervatus paucipunctus H.A. Pilsbry, 1898 - (BULIMULIDAE)
- Acesta, Genus Acesta H. Adams & A. Adams, 1858 (LIMIDAE)
- aceste, Unicardiopsis aceste (A.V.M.D. D'Orbigny †) - (UNICARDIOPSIDAE) (FOSSIL)
- acestra, Stenodrillia acestra W.H. Dall, 1889 - syn of: Compsodrillia acestra (W.H. Dall, 1889) - (DRILLIIDAE)
- acestra, Compsodrillia acestra (W.H. Dall, 1889) - (PSEUDOMELATOMIDAE)
- acetabulum, Meganodontia acetabulum P. Bouchet & R. von Cosel, 2004 - (LUCINIDAE)
- acetabulum, Dosinia acetabulum T.A. Conrad, 1832 † - (VENERIDAE) (FOSSIL)
- acetabulum blackwelderi, Dosinia acetabulum blackwelderi L.W. Ward, 1992 † - (VENERIDAE) (FOSSIL)
- acetabulum thori, Dosinia acetabulum thori L.W. Ward, 1992 † - (VENERIDAE) (FOSSIL)
- Acevina, Genus Acevina Rusconi, 1952 (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- achaeus, Anomia achaeus Gray, 1849 - (ANOMIIDAE)
- achaiae, Goniochilus achaiae D. Esu & O. Girotti, 2015 † - (HYDROBIIDAE) (FOSSIL)
- achaica, Albinaria hians achaica (O. Böttger, 1885) - (CLAUSILIIDAE)
- achaicum, Cochlostoma achaicum (O. Böttger, 1885) - (COCHLOSTOMATIDAE)
- achaja, Heleobia achaja (S. Clessin, 1879) - (COCHLIOPIDAE)
- achaja sorella, Heleobia achaja sorella (C.A. Westerlund, 1879) - (COCHLIOPIDAE)
- achajae, Aplexa achajae C.A. Westerlund - syn of: Aplexa hypnorum (C. Linnaeus, 1758) - (PHYSIDAE)
- achalana, Spixia achalana (A. Doering, 1877) - (ODONTOSTOMIDAE)
- achanes, Crenostrea achanes W.P. Woodring, 1982 † - (GRYPHAEIDAE) (FOSSIL)
- Achantina, syn of: Genus Achatina J.B.P.A. Lamarck, 1799 (ACHATINIDAE)
- Achantinella, syn of: Genus Acanthinula H.H. Beck, 1847 (VALLONIIDAE)
- Acharax, Genus Acharax W.H. Dall, 1908 (SOLEMYIDAE)
- Achasmea, Subgenus Leiochasmea (Achasmea) W.H. Dall, P. Bartsch & H.A. Rehder, 1938 (GALEOMMATIDAE)
- achatellinus, Naesiotus achatellinus (E. Forbes, 1850) - (BULIMULIDAE)
- achatellinus, Bulimulus achatellinus E. Forbes, 1850 - syn of: Naesiotus achatellinus (E. Forbes, 1850) - (BULIMULIDAE)
- achatensis, Euspira achatensis (C.A. Récluz in Koninck, 1838 †) - (NATICIDAE) (FOSSIL)
- achates, Acanthochitona achates (A.A. Gould, 1859) - (ACANTHOCHITONIDAE)
- achates, Acmaea achates (L.A. Reeve, 1855) - (ACMAEIDAE)
- achates, Chilostoma achates E.A. Rossmässler, 1835 - (HELICIDAE)
- Achates, Subgenus Janthina (Achates) O.A.L. Mφrch, 1860 (JANTHINIDAE)
- achates, Patella achates L.A. Reeve, 1855 - syn of: Acmaea achates (L.A. Reeve, 1855) - (PATELLIDAE)
- achates, Pyramidella achates (A.A. Gould, 1853) - (PYRAMIDELLIDAE)
- achates, Terebra achates C.S. Weaver, 1960 - (TEREBRIDAE)
- achates cingulina, Chilostoma achates cingulina (G.P. Deshayes, 1839) - (HELICIDAE)
- achates nominotipica, Chilostoma achates nominotipica (P. von Ströbel, 1857) - (HELICIDAE)
- achates ochroleucum, Chilostoma achates ochroleucum (J.F. Babor & J. Koštal, 1894) - (HELICIDAE)
- achates rhaeticum, Chilostoma achates rhaeticum P. von Ströbel, 1857 - syn of: Chilostoma adelozona rhaeticum (P. von Ströbel, 1857) - (HELICIDAE)
- achates stiriae, Chilostoma achates stiriae (L. Forcart, 1933) - (HELICIDAE)
- Achathina, syn of: Genus Achatina J.B.P.A. Lamarck, 1799 (ACHATINIDAE)
- achatidea, Schilderia achatidea (J.E. Gray in G.B. I Sowerby, 1837) - (CYPRAEIDAE)
- achatidea auricoma, Cypraea achatidea auricoma J.C.H. Crosse, 1896 - syn of: Schilderia achatidea (J.E. Gray in G.B. I Sowerby, 1837) - (CYPRAEIDAE)
- achatidea bifasciata, Cypraea achatidea bifasciata J.G. Hidalgo, 1906 - syn of: Schilderia achatidea (J.E. Gray in G.B. I Sowerby, 1837) - (CYPRAEIDAE)
- achatidea efasciata, Cypraea achatidea efasciata P.M. Pallary, 1900 - syn of: Schilderia achatidea (J.E. Gray in G.B. I Sowerby, 1837) - (CYPRAEIDAE)
- achatidea elongata, Cypraea achatidea elongata P.M. Pallary, 1900 - syn of: Schilderia achatidea (J.E. Gray in G.B. I Sowerby, 1837) - (CYPRAEIDAE)
- achatidea globosa, Cypraea achatidea globosa P.M. Pallary, 1900 - syn of: Schilderia achatidea (J.E. Gray in G.B. I Sowerby, 1837) - (CYPRAEIDAE)
- achatidea inopinata, Schilderia achatidea inopinata F.A. Schilder, 1930 - (CYPRAEIDAE)
- achatidea lineata, Cypraea achatidea lineata P.M. Pallary, 1900 - syn of: Schilderia achatidea (J.E. Gray in G.B. I Sowerby, 1837) - (CYPRAEIDAE)
- achatidea longinqua, Schilderia achatidea longinqua F.A. Schilder & M. Schilder, 1938 - (CYPRAEIDAE)
- achatidea major, Cypraea achatidea major P.M. Pallary, 1900 - syn of: Schilderia achatidea (J.E. Gray in G.B. I Sowerby, 1837) - (CYPRAEIDAE)
- achatidea minor, Cypraea achatidea minor P.M. Pallary, 1900 - syn of: Schilderia achatidea (J.E. Gray in G.B. I Sowerby, 1837) - (CYPRAEIDAE)
- achatidea nana, Cypraea achatidea nana J.C.H. Crosse, 1896 - syn of: Schilderia achatidea (J.E. Gray in G.B. I Sowerby, 1837) - (CYPRAEIDAE)
- achatidea oranica, Cypraea achatidea oranica J.C.H. Crosse, 1896 - syn of: Schilderia achatidea (J.E. Gray in G.B. I Sowerby, 1837) - (CYPRAEIDAE)
- achatidea physoides, Cypraea achatidea physoides T.A. de M. Monterosato, 1897 - syn of: Schilderia achatidea (J.E. Gray in G.B. I Sowerby, 1837) - (CYPRAEIDAE)
- achatidea punctata, Cypraea achatidea punctata P.M. Pallary, 1900 - syn of: Schilderia achatidea (J.E. Gray in G.B. I Sowerby, 1837) - (CYPRAEIDAE)
- achatidea quadrifasciata, Cypraea achatidea quadrifasciata J.G. Hidalgo, 1906 - syn of: Schilderia achatidea (J.E. Gray in G.B. I Sowerby, 1837) - (CYPRAEIDAE)
- achatidea trifasciata, Cypraea achatidea trifasciata J.G. Hidalgo, 1906 - syn of: Schilderia achatidea (J.E. Gray in G.B. I Sowerby, 1837) - (CYPRAEIDAE)
- Achatina, Genus Achatina J.B.P.A. Lamarck, 1799 (ACHATINIDAE)
- achatina, Achatina achatina (C. Linnaeus, 1758) - (ACHATINIDAE)
- achatina, Semicassis achatina J.B.P.A. Lamarck, 1816 - syn of: Semicassis labiata (G. Perry, 1811) - (CASSIDAE)
- achatina, Semicassis achatina L.A. Reeve, 1848 - syn of: Semicassis labiata zeylanica (J.B.P.A. Lamarck, 1822) - (CASSIDAE)
- achatina, Semicassis achatina Barattini & E.H. Ureta, 1960 - syn of: Semicassis labiata iheringi (A. Carcelles, 1953) - (CASSIDAE)
- achatina, Mitrella achatina G.B. Sowerby, 1844 - syn of: Mitrella gervillii (B.C.M. Payraudeau, 1826) - (COLUMBELLIDAE)
- achatina, Lyncina achatina G. Perry, 1811 - syn of: Lyncina ventriculus (J.B.P.A. Lamarck, 1810) - (CYPRAEIDAE)
- achatina, Fasciolaria achatina P.F. Röding, 1798 - syn of: Fasciolaria tulipa (C. Linnaeus, 1758) - (FASCIOLARIIDAE)
- achatina, Austrodrillia achatina J.C. Verco, 1909 - syn of: Austrodrillia dimidiata (G.B. III Sowerby, 1896) - (HORAICLAVIDAE)
- achatina, Mactra achatina H.S. Holten, 1802 - (MACTRIDAE)
- achatina, Bullia achatina J.B.P.A. Lamarck, 1816 - syn of: Bullia digitalis (L.W. Dillwyn, 1817) - (NASSARIIDAE)
- achatina, Nerita achatina L.A. Reeve, 1855 - syn of: Nerita senegalensis J.F. Gmelin, 1791 - (NERITIDAE)
- achatina, Plectopylis achatina (J.E. Gray, 1834) - (PLECTOPYLIDAE)
- achatina, Sanguinolaria achatina (L. Spengler, 1798) - (PSAMMOBIIDAE)
- achatina, Rissoina achatina N.H. Odhner, 1924 - (RISSOINIDAE)
- achatina, Tellina achatina L. Spengler, 1798 - syn of: Sanguinolaria achatina (L. Spengler, 1798) - (TELLINIDAE)
- achatina bayoli, Achatina achatina bayoli P.M.A. Morelet, 1888 - (ACHATINIDAE)
- achatina elegans, Achatina achatina elegans J.H.F. Link, 1807 - (ACHATINIDAE)
- achatina maculosa, Mactra achatina maculosa J.B.P.A. Lamarck, 1818 - (MACTRIDAE)
- achatina minima, Achatina achatina minima J. Germain, 1912 - (ACHATINIDAE)
- achatina monochromatica, Achatina achatina monochromatica H.A. Pilsbry - (ACHATINIDAE)
- achatina ornata, Mactra achatina ornata J.E. Gray, 1837 - (MACTRIDAE)
- achatinaceum, Paropeas achatinaceum (L. Pfeiffer, 1846) - (SUBULINIDAE)
- Achatinella, Genus Achatinella W.J. Swainson, 1828 (ACHATINELLIDAE)
- achatinella, Odostomia achatinella A. Adams, 1860 - (PYRAMIDELLIDAE)
- Achatinellastrum, Subgenus Achatinella (Achatinellastrum) L. Pfeiffer, 1854 (ACHATINELLIDAE)
- ACHATINELLIDAE Gulick, 1873 - Family (GASTROPODA-HETEROBRANCHIA-PULMONATA-STYLOMMATOPHORA)
- Achatinelloides, Subgenus Passamaella (Achatinelloides) G. Nevill, 1878 (CERASTUIDAE)
- achatinellus, Naesiotus achatinellus E. Forbes, 1850 - syn of: Naesiotus achatellinus (E. Forbes, 1850) - (BULIMULIDAE)
- ACHATINIDAE Swainson, 1840 - Family (GASTROPODA-HETEROBRANCHIA-PULMONATA-STYLOMMATOPHORA)
- achatininus, Pseudobuliminus achatininus (O.F. von Möllendorff, 1899) - (BRADYBAENIDAE)
- achatinoides, Rissoina achatinoides (A.W.B. Powell, 1937) - (RISSOINIDAE)
- achatinoides, Viviparus achatinoides (G.P. Deshayes, 1838 †) - (VIVIPARIDAE) (FOSSIL)
- achatinoides oltenensis, Viviparus achatinoides oltenensis Lubenescu & Zazuleac, 1985 † - (VIVIPARIDAE) (FOSSIL)
- Achatinum, syn of: Genus Achatina J.B.P.A. Lamarck, 1799 (ACHATINIDAE)
- achatinum, Buccinum achatinum J.B.P.A. Lamarck, 1816 - syn of: Bullia digitalis (L.W. Dillwyn, 1817) - (BUCCINIDAE)
- achatinum, Leptopoma achatinum (J.C.H. Crosse, 1865) - (CYCLOPHORIDAE)
- achatinum, Cyclostoma achatinum J.B.P.A. Lamarck, 1812 - syn of: Viviparus viviparus (C. Linnaeus, 1758) - (POMATIIDAE)
- Achatinus, syn of: Genus Achatina J.B.P.A. Lamarck, 1799 (ACHATINIDAE)
- achatinus, Callochiton achatinus T. Brown, 1823 - syn of: Callochiton septemvalvis (G. Montagu, 1803) - (CALLOCHITONIDAE)
- achatinus, Chiton achatinus T. Brown, 1827 - syn of: Callochiton septemvalvis (G. Montagu, 1803) - (CHITONIDAE)
- achatinus, Pionoconus achatinus (J.F. Gmelin, 1791) - (CONIDAE)
- achatinus, Conus achatinus C.H. Hwass in J.G. Bruguière, 1792 - syn of: Pionoconus achatinus (J.F. Gmelin, 1791) - (CONIDAE)
- achatinus, Cucullus achatinus P.F. Röding, 1798 - syn of: Kalloconus pulcher (J. Lightfoot, 1786) - (CONIDAE)
- achatinus, Fasciolaria achatinus P.F. Röding, 1798 - syn of: Fasciolaria tulipa (C. Linnaeus, 1758) - (FASCIOLARIIDAE)
- achatinus, Mytilus achatinus J.B.P.A. Lamarck, 1819 - syn of: Perna perna (C. Linnaeus, 1758) - (MYTILIDAE)
- achatinus, Liguus fasciatus achatinus W.J. Clench, 1934 - (ORTHALICIDAE)
- achatinus euboecus, Callochiton achatinus euboecus M. Kattoulas, A. Koukouras & P. Economidis, 1973 - syn of: Callochiton septemvalvis (G. Montagu, 1803) - (CALLOCHITONIDAE)
- achatinus longispinosus, Callochiton achatinus longispinosus E.H.J. Leloup, 1952 - syn of: Callochiton longispinosus E.H.J. Leloup, 1952 - (CALLOCHITONIDAE)
- achatinus violacea, Conus achatinus violacea J.G. de Barros e Cunha, 1933 - syn of: Pionoconus achatinus (J.F. Gmelin, 1791) - (CONIDAE)
- Achatium, syn of: Genus Achatina J.B.P.A. Lamarck, 1799 (ACHATINIDAE)
- acheila, Hydrobia acheila Š. Brusina, 1902 † - (HYDROBIIDAE) (FOSSIL)
- acheila, Vertigo acheila G. Servain, 1880 - syn of: Vertigo moulinsiana (D. Dupuy, 1849) - (VERTIGINIDAE)
- achelous, Ceratites achelous (Münster, 1834 †) - (CERATITIDAE) (FOSSIL)
- achenea, Gibberula achenea (B. Roth & E.V. Coan, 1971) - (CYSTISCIDAE)
- achernaria, Kimberleytrachia achernaria F. Köhler, 2011 - (CAMAENIDAE)
- acheron, Sciocochlea cryptica acheron A. Reischütz & P.L. Reischütz, 2004 - (CLAUSILIIDAE)
- acheronae, Aliptina acheronae B.A. Marshall, 1978 - (CERITHIOPSIDAE)
- acheronensis, Beddomeia acheronensis W.F. Ponder & K.B. Clark, 1993 - (HYDROBIIDAE)
- acheronensis absona, Beddomeia acheronensis absona W.F. Ponder & K.B. Clark, 1993 - (HYDROBIIDAE)
- acherontea, Pholadidea acherontea A.G. Beu & F.M. Climo, 1974 - (PHOLADIDAE)
- acherontis, Calliotropis acherontis B.A. Marshall, 1979 - (CALLIOTROPIDAE)
- acherontis, Protocerion acherontis (B. Roth & O. Hartman, 1998 †) - (CERIONIDAE) (FOSSIL)
- acherontis, Limatula acherontis Fleming, 1978 - (LIMIDAE)
- acherontis, Grippina acherontis B.A. Marshall, 2002 - (SPHENIOPSIDAE)
- acherusius, Chryseofusus acherusius R. Hadorn & K. Fraussen, 2003 - (FASCIOLARIIDAE)
- acheshbokensis, Phyllocladiscites acheshbokensis Shevyrev, 1968 † - (CLADISCITIDAE) (FOSSIL)
- Achguigites, Genus Achguigites Klug , 2002 (AGONIATITIDAE) (FOSSIL)
- achiles, Astarte achiles A.V.M.D. D'Orbigny, 1850 † - (ASTARTIDAE) (FOSSIL)
- achillei, Frechiella achillei Renz, 1912 † - (HILDOCERATIDAE) (FOSSIL)
- achilles, Margarella achilles (H. Strebel, 1908) - (CALLIOSTOMATIDAE)
- achilles, Hunsteinia achilles (J.W. Brazier, 1886) - (HELICARIONIDAE)
- achilles, Thaumastus achilles (L. Pfeiffer, 1852) - (MEGASPIRIDAE)
- achilles nehringi, Thaumastus achilles nehringi E.C. Von Martens, 1889 - (MEGASPIRIDAE)
- achimszulci, Carychium achimszulci Stworzewicz, 1999 † - (ELLOBIIDAE) (FOSSIL)
- achinolfi, Solatopupa achinolfi C.M. Steenberg, 1925 - syn of: Solatopupa juliana (A. Issel, 1866) - (CHONDRINIDAE)
- achirona, Caecum achirona (L. de Folin, 1867) - (CAECIDAE)
- achirona striata, Caecum achirona striata L. de Folin, 1867 - syn of: Caecum someri (L. de Folin, 1867) - (CAECIDAE)
- Achoanomphalus, Subgenus Choanomphalus (Achoanomphalus) W.A. Lindholm, 1909 (PLANORBIDAE)
- acholus, Rabdotus acholus J.F. Mabille, 1895 - syn of: Naesiotus montezuma W.H. Dall, 1893 - (BULIMULIDAE)
- achrafensis, Euxina achrafensis H. Nordsieck, 1995 - (CLAUSILIIDAE)
- achroma, Montereina achroma (Á. Valdés, 2001) - (DISCODORIDIDAE)
- achrous, Scutalus achrous F. Haas, 1952 - (BULIMULIDAE)
- achurense, Kingoceras achurense Zakharov, 1983 † - (PARACELTITIDAE) (FOSSIL)
- achyophila, Oxychilus achyophila É.A.A. Locard, 1899 - syn of: Oxychilus draparnaudi (H.H. Beck, 1837) - (OXYCHILIDAE)
- acia, Alcyna acia (B.C. Cotton, 1948) - (TROCHIDAE)
- acicula, Tornatellides perkinsi acicula H.A. Pilsbry & C.M. Cooke, 1915 - (ACHATINELLIDAE)
- Acicula, Genus Acicula J.D.W. Hartmann, 1821 (ACICULIDAE)
- acicula, Acicula acicula O.F. Müller, 1774 - syn of: Cecilioides acicula (O.F. Müller, 1774) - (ACICULIDAE)
- acicula, Lewisiella acicula (Hornes, 1853 †) - (ATAPHRIDAE) (FOSSIL)
- acicula, Cerithium acicula Š. Brusina, 1865 - syn of: Cerithiopsis tubercularis (G. Montagu, 1803) - (CERITHIIDAE)
- acicula, Cerithiopsis acicula Š. Brusina, 1864 - (CERITHIOPSIDAE)
- acicula, Nannophaedusa acicula H. Nordsieck, 2012 - (CLAUSILIIDAE)
- acicula, Agathylla sulcosa acicula (F.J. Cantraine, 1835) - (CLAUSILIIDAE)
- acicula, Clio acicula P.C.A.S.L. Rang, 1828 - syn of: Creseis clava (P.C.A.S.L. Rang, 1828) - (CLIIDAE)
- acicula, Aoteatilia acicula (H.H. Suter, 1908) - (COLUMBELLIDAE)
- acicula, Columbella acicula L.A. Reeve, 1858 - syn of: Graphicomassa ligula (P.L. Duclos, 1840) - (COLUMBELLIDAE)
- acicula, Creseis acicula P.C.A.S.L. Rang, 1828 - syn of: Creseis clava (P.C.A.S.L. Rang, 1828) - (CRESEIDAE)
- acicula, Melanella acicula (A.A. Gould, 1849) - (EULIMIDAE)
- acicula, Eulima acicula C.L.F. von Sandberger, 1863 † - (EULIMIDAE) (FOSSIL)
- acicula, Stilifer acicula A.A. Gould, 1849 - syn of: Melanella acicula (A.A. Gould, 1849) - (EULIMIDAE)
- acicula, Cecilioides acicula (O.F. Müller, 1774) - (FERUSSACIIDAE)
- acicula, Cecilioides acicula O.F. Müller, 1774 - syn of: Cecilioides acicula (O.F. Müller, 1774) - (FERUSSACIIDAE)
- acicula, Socenia acicula (Š. Brusina, 1892 †) - (HYDROBIIDAE) (FOSSIL)
- acicula, Bythiospeum acicula (J.D.W. Hartmann, 1821) - (HYDROBIIDAE)
- acicula, Pyrgula acicula A. Reischütz & P.L. Reischütz, 2002 - (HYDROBIIDAE)
- acicula, Turritellopsis acicula Sars, 1878 - (MATHILDIDAE)
- acicula, Turritellopsis acicula W. Stimpson, 1851 - syn of: Turritellopsis stimpsoni W.H. Dall, 1919 - (MATHILDIDAE)
- acicula, Faunus acicula J.F. Gmelin, 1791 - syn of: Faunus ater (C. Linnaeus, 1758) - (PACHYCHILIDAE)
- acicula, Paraprososthenia acicula R.A.M. Brandt, 1970 - (POMATIOPSIDAE)
- acicula, Puposyrnola acicula (J.B.P.A. Lamarck, 1804 †) - (PYRAMIDELLIDAE) (FOSSIL)
- acicula, Eulimella acicula (R.A. Philippi, 1836) - (PYRAMIDELLIDAE)
- acicula, Daphnella acicula H.H. Suter, 1908 - syn of: Aoteatilia acicula (H.H. Suter, 1908) - (RAPHITOMIDAE)
- acicula, Rissoa acicula (A. Risso, 1826) - (RISSOIDAE)
- acicula, Rissoa acicula A.G. Desmarest, 1814 - syn of: Rissoa auriscalpium (C. Linnaeus, 1758) - (RISSOIDAE)
- acicula, Raffraya acicula (P.M.A. Morelet, 1877) - (STREPTAXIDAE)
- acicula, Melania acicula R.A. Philippi, 1836 - syn of: Eulimella acicula (R.A. Philippi, 1836) - (THIARIDAE)
- acicula, Triphora acicula A. Issel, 1869 - (TRIPHORIDAE)
- acicula, Inella acicula C.F. Laseron, 1958 - (TRIPHORIDAE)
- acicula, Turritella acicula W. Stimpson, 1851 - syn of: Turritellopsis stimpsoni W.H. Dall, 1919 - (TURRITELLIDAE)
- acicula, Paludina acicula J.D.W. Hartmann, 1821 - syn of: Bythiospeum acicula (J.D.W. Hartmann, 1821) - (VIVIPARIDAE)
- acicula, Zebina acicula C.F. Laseron, 1956 - (ZEBINIDAE)
- acicula intersecta, Eulimella acicula intersecta L. de Folin - (PYRAMIDELLIDAE)
- acicula liesvillei, Cecilioides acicula liesvillei J.R. Bourguignat, 1856 - syn of: Cecilioides acicula (O.F. Müller, 1774) - (FERUSSACIIDAE)
- acicula nodosaria, Cochlicopa acicula nodosaria O. Böttger, 1879 - syn of: Cecilioides acicula (O.F. Müller, 1774) - (COCHLICOPIDAE)
- acicula stimpsoni, Turritellopsis acicula stimpsoni W.H. Dall, 1919 - syn of: Turritellopsis stimpsoni W.H. Dall, 1919 - (MATHILDIDAE)
- aciculare, Orthoceras aciculare J. Brown, 1860 † - (ORTHOCERATIDAE) (FOSSIL)
- aciculare, Pelycidion aciculare (A.E.M. Cossmann & G. Pissarro, 1913 †) - (PELYCIDIIDAE) (FOSSIL)
- Acicularia, syn of: Genus Polygireulima F. Sacco, 1892 (EULIMIDAE)
- Aciculariana, syn of: Subgenus Fagotia (Microcolpia) J.R. Bourguignat, 1884 (MELANOPSIDAE)
- acicularis, Strobilus acicularis C.M. Cooke & Y. Kondo, 1960 - (ACHATINELLIDAE)
- acicularis, Bulimus acicularis J.B.P.A. Lamarck, 1804 † - (BULIMULIDAE) (FOSSIL)
- acicularis, Tryonia acicularis Nuttall, 1990 † - (COCHLIOPIDAE) (FOSSIL)
- acicularis, Dyris acicularis Wesselingh, 2006 † - (COCHLIOPIDAE) (FOSSIL)
- acicularis, Erosaria acicularis (J.F. Gmelin, 1791) - (CYPRAEIDAE)
- acicularis, Eulima acicularis A. Adams, 1861 - (EULIMIDAE)
- acicularis, Eulima acicularis W.M. Gabb, 1873 † - syn of: Eulima sarissiformis (H.A. Pilsbry & C.W. Johnson, 1917 †) - (EULIMIDAE) (FOSSIL)
- acicularis, Iglica acicularis A.M. Angelov, 1959 - (HYDROBIIDAE)
- acicularis, Loxonema acicularis F.A. Roemer, 1855 † - (LOXONEMATIDAE) (FOSSIL)
- acicularis, Melanopsis acicularis A.E.J. Férussac, 1823 - syn of: Microcolpia daudebartii acicularis (A.E.J. Férussac, 1823) - (MELANOPSIDAE)
- acicularis, Fagotia acicularis A.E.J. Férussac, 1823 - syn of: Microcolpia daudebartii acicularis (A.E.J. Férussac, 1823) - (MELANOPSIDAE)
- acicularis, Microcolpia daudebartii acicularis (A.E.J. Férussac, 1823) - (MELANOPSIDAE)
- acicularis, Cymbovula acicularis (J.B.P.A. Lamarck, 1811) - (OVULIDAE)
- acicularis, Ovula acicularis G.W. Tryon, 1885 - syn of: Simnia spelta (C. Linnaeus, 1758) - (OVULIDAE)
- acicularis, Cymbula acicularis J.B.P.A. Lamarck, 1811 - syn of: Cymbovula acicularis (J.B.P.A. Lamarck, 1811) - (PATELLIDAE)
- acicularis, Turbonilla acicularis (A. Adams, 1855) - (PYRAMIDELLIDAE)
- acicularis, Chemnitzia acicularis (C.F. Laseron, 1951) - syn of: Chemnitzia similis (C.F. Laseron, 1951) - (PYRAMIDELLIDAE)
- acicularis, Obeliscus acicularis C.G. Aguayo & M.L. Jaume, 1957 - (SUBULINIDAE)
- acicularis, Torrecoptis acicularis (C. de la Torre, 1912) - (UROCOPTIDAE)
- acicularis, Columella acicularis S.K. Almuhambetova, 1979 - (VERTIGINIDAE)
- acicularis, Paludina acicularis Hislop, 1859 † - (VIVIPARIDAE) (FOSSIL)
- acicularis algoensis, Erosaria acicularis algoensis unknown - (CYPRAEIDAE)
- acicularis marcuscoltroi, Erosaria acicularis marcuscoltroi E.J. Petuch & R.F. Myers, 2015 - (CYPRAEIDAE)
- acicularis polita, Pupilla acicularis polita J.D.W. Hartmann, 1840 - syn of: Platyla polita (J.D.W. Hartmann, 1840) - (PUPILLIDAE)
- acicularis raphi, Strobilus acicularis raphi C.M. Cooke & Y. Kondo, 1960 - (ACHATINELLIDAE)
- acicularis sanctahelenae, Erosaria acicularis sanctahelenae F.A. Schilder, 1930 - (CYPRAEIDAE)
- acicularis stussineri, Esperiana acicularis stussineri H. Schütt & F. Bilgin, 1974 - syn of: Microcolpia daudebartii stussineri H. Schütt & F. Bilgin, 1974 - (MELANOPSIDAE)
- aciculata, Cavolinia aciculata D'Orbigny, 1834 - syn of: Creseis clava (P.C.A.S.L. Rang, 1828) - (CAVOLINIIDAE)
- aciculata, Cerithiopsis aciculata É.A.A. Locard & E. Caziot, 1900 - syn of: Cerithiopsis tubercularis (G. Montagu, 1803) - (CERITHIOPSIDAE)
- aciculata, Lindholmiella aciculata (A.R.J.B. Bavay & P. Dautzenberg, 1909) - (CLAUSILIIDAE)
- aciculata, Mazatlania aciculata J.B.P.A. Lamarck, 1822 - syn of: Mazatlania cosentini (R.A. Philippi, 1836) - (COLUMBELLIDAE)
- aciculata, Melanella aciculata (W.H. Pease, 1861) - (EULIMIDAE)
- aciculata, Eulima aciculata W.H. Pease, 1861 - syn of: Melanella aciculata (W.H. Pease, 1861) - (EULIMIDAE)
- aciculata, Pyrgula aciculata P.S. Pavlovic, 1932 † - (HYDROBIIDAE) (FOSSIL)
- aciculata, Macellomenia aciculata A.H. Scheltema, 1999 - (MACELLOMENIIDAE)
- aciculata, Murchisonia aciculata J.W. Hall, 1860 † - (MURCHISONIIDAE) (FOSSIL)
- aciculata, Ocinebrina aciculata (J.B.P.A. Lamarck, 1822) - (MURICIDAE)
- aciculata, Cossmannica aciculata (C.B. Adams, 1854) - (PYRAMIDELLIDAE)
- aciculata, Eulimella aciculata R.A. Philippi, 1836 - syn of: Eulimella acicula (R.A. Philippi, 1836) - (PYRAMIDELLIDAE)
- aciculata, Rissoa aciculata É.A.A. Locard, 1886 - syn of: Rissoa auriscalpium (C. Linnaeus, 1758) - (RISSOIDAE)
- aciculata, Hastula aciculata J.F. Gmelin, 1791 - syn of: Hastula solida (G.P. Deshayes, 1857) - (TEREBRIDAE)
- aciculata cingulifera, Ocinebrina aciculata cingulifera P.M. Pallary, 1920 - syn of: Ocinebrina aciculata (J.B.P.A. Lamarck, 1822) - (MURICIDAE)
- aciculata corallinoides, Ocinebrina aciculata corallinoides P.M. Pallary, 1912 - syn of: Ocinebrina corallinoides P.M. Pallary, 1912 - (MURICIDAE)
- aciculata elongata, Ocinebrina aciculata elongata P.M. Pallary, 1920 - syn of: Ocinebrina aciculata (J.B.P.A. Lamarck, 1822) - (MURICIDAE)
- aciculata exilis, Ocinebrina aciculata exilis R. Houart, 2001 - syn of: Ocinebrina corallinoides P.M. Pallary, 1912 - (MURICIDAE)
- aciculata kuronamako, Melanella aciculata kuronamako (T. Habe, 1952) - (EULIMIDAE)
- aciculata scalariformis, Ocinebrina aciculata scalariformis G.S. Coen, 1933 ex T.A. de M. Monterosato MS - syn of: Ocinebrina aciculata (J.B.P.A. Lamarck, 1822) - (MURICIDAE)
- aciculatum, Crenilabium aciculatum A.E.M. Cossmann, 1889 - (ACTEONIDAE)
- aciculatum, Buccinum aciculatum J.F. Gmelin, 1791 - syn of: Hastula solida (G.P. Deshayes, 1857) - (BUCCINIDAE)
- aciculatum, Buccinum aciculatum J.B.P.A. Lamarck, 1822 - syn of: Mazatlania cosentini (R.A. Philippi, 1836) - (BUCCINIDAE)
- aciculatum, Epitonium aciculatum R.B. Hinds, 1844 - syn of: Epitonium apiculatum (W.H. Dall, 1889) - (EPITONIIDAE)
- aciculatus, Fusinus aciculatus (J.B.P.A. Lamarck, 1803 †) - (FASCIOLARIIDAE) (FOSSIL)
- aciculatus, Fusus aciculatus S. Delle Chiaje in G.S. Poli, 1826 - syn of: Fusinus rostratus (A.G. Olivi, 1792) - (FASCIOLARIIDAE)
- aciculatus, Murex aciculatus J.B.P.A. Lamarck, 1822 - syn of: Ocinebrina aciculata (J.B.P.A. Lamarck, 1822) - (MURICIDAE)
- aciculatus, Raphitoma aciculatus J.B.P.A. Lamarck, 1822 - syn of: Mangelia attenuata (G. Montagu, 1803) - (RAPHITOMIDAE)
- aciculatus badia, Murex aciculatus badia J.G. Jeffreys, 1867 - syn of: Ocinebrina aciculata (J.B.P.A. Lamarck, 1822) - (MURICIDAE)
- aciculatus curta, Murex aciculatus curta T.A. de M. Monterosato, 1882 - syn of: Ocinebrina aciculata (J.B.P.A. Lamarck, 1822) - (MURICIDAE)
- aciculatus elongata, Murex aciculatus elongata T.A. de M. Monterosato, 1878 - syn of: Ocinebrina aciculata (J.B.P.A. Lamarck, 1822) - (MURICIDAE)
- aciculatus minor, Murex aciculatus minor T.A. de M. Monterosato, 1882 - syn of: Ocinebrina aciculata (J.B.P.A. Lamarck, 1822) - (MURICIDAE)
- aciculella, Cecilioides aciculella (C.L.F. von Sandberger, 1872 †) - (FERUSSACIIDAE) (FOSSIL)
- aciculella, Melanopsis aciculella V.L.V. Potiez & A. Michaud, 1838 - syn of: Melanopsis cornea Pfeiffer, 1828 - (MELANOPSIDAE)
- ACICULIDAE Gray, 1850 - Family (GASTROPODA-CAENOGASTROPODA-ARCHITAENIOGLOSSA)
- aciculiformis, Rhaphibelus aciculiformis Zell, J. Beckmann & Stinnesbeck, 2013 † - (BELEMNITIDA (unassigned)) (FOSSIL)
- aciculiger, Murex aciculiger A. Valenciennes, 1846 - syn of: Ceratostoma monoceros (G.B. II Sowerby, 1841) - (MURICIDAE)
- aciculina, Epitonium aciculina R.B. Hinds, 1844 - syn of: Epitonium apiculatum (W.H. Dall, 1889) - (EPITONIIDAE)
- aciculina, Hydrobia aciculina (J.R. Bourguignat, 1876) - (HYDROBIIDAE)
- aciculina, Turripontica aciculina V.V. Anistratenko, 1993 † - (MELANOPSIDAE) (FOSSIL)
- Aciculina, syn of: Genus Nassarius Dumιril, 1805 (NASSARIIDAE)
- aciculina, Odostomia aciculina S.M. Souverbie, 1865 - (PYRAMIDELLIDAE)
- aciculina, Impages aciculina (J.B.P.A. Lamarck, 1822) - (TEREBRIDAE)
- aciculina, Terebra aciculina L.A. Reeve, 1860 - (TEREBRIDAE)
- Aciculiscala, Genus Aciculiscala Sohl, 1963 (EPITONIIDAE) (FOSSIL)
- aciculoides, Cecilioides aciculoides G.J. De Cristofori & G. Jan, 1832 - syn of: Cecilioides acicula (O.F. Müller, 1774) - (FERUSSACIIDAE)
- aciculoides, Bythiospeum aciculoides (S. Clessin, 1909) - (HYDROBIIDAE)
- aciculum, Coleolus aciculum J.W. Hall, 1879 † - (COLEOLIDAE) (FOSSIL)
- aciculum, Dentalium aciculum A.A. Gould, 1859 - (DENTALIIDAE)
- acidalia, Pseudoliotia acidalia (J.C. Melvill & R. Standen, 1899) - (TORNIDAE)
- acidalia, Microthyca acidalia J.C. Melvill & R. Standen, 1899 - syn of: Pseudoliotia acidalia (J.C. Melvill & R. Standen, 1899) - (TORNIDAE)
- acidna, Eumetadrillia acidna W.P. Woodring, 1970 † - (DRILLIIDAE) (FOSSIL)
- acies, Zaclys acies H.H. Suter, 1908 - syn of: Zaclys sarissa (R. Murdoch, 1905) - (CERITHIOPSIDAE)
- acies, Keepingia acies (A. Watelet, 1850 †) - (NASSARIIDAE) (FOSSIL)
- acies, Aegopis acies (A.E.J. Férussac, 1819) - (ZONITIDAE)
- aciesa, Eratoidea aciesa T. McCleery, 2011 - (MARGINELLIDAE)
- aciformis, Fractolatirus aciformis (R. Tate, 1888 †) - (FASCIOLARIIDAE) (FOSSIL)
- Acila, Genus Acila H. Adams & A. Adams, 1858 (NUCULIDAE)
- acilacustris, Semisalsa acilacustris Schütt, 1991 † - (COCHLIOPIDAE) (FOSSIL)
- Acilana, Genus Acilana Khomenko, 1937 (NUCULANIDAE) (FOSSIL)
- Acilia, Genus Acilia Koken, 1896 (PROSTYLIFERIDAE) (FOSSIL)
- aciloides, Gonionucula aciloides Hautmann & al., 2011 † - (NUCULIDAE) (FOSSIL)
- acinacea, Nuculana acinacea T. Habe, 1958 - (NUCULANIDAE)
- acinacellum, Bassleroceras acinacellum (R.P. Whitfield, 1886 †) - (BASSLEROCERATIDAE) (FOSSIL)
- acinaces, Zenatia acinaces (J.R.C. Quoy & J.P. Gaimard, 1835) - (MACTRIDAE)
- acinaces, Oonoceras acinaces (Barrande, 1866 †) - (OONOCERATIDAE) (FOSSIL)
- acinaces, Actinopteria acinaces Talent, 1963 † - (PTERINEIDAE) (FOSSIL)
- acinaces, Solen acinaces S.C.T. Hanley, 1843 - (SOLENIDAE)
- acinaces cumingiana, Zenatia acinaces cumingiana G.P. Deshayes, 1854 - (MACTRIDAE)
- acinaces elongatum, Oonoceras acinaces elongatum (Barrande, 1866 †) - (OONOCERATIDAE) (FOSSIL)
- acinaciformis, Promytilus acinaciformis Harrington, 1955 † - (MYTILIDAE) (FOSSIL)
- acinaciformis, Scaeoleda acinaciformis (R. Tate, 1886 †) - (NUCULANIDAE) (FOSSIL)
- acinatus, Callistochiton palmulatus acinatus W.H. Dall, 1879 - (CALLISTOPLACIDAE)
- acincta, Trecanolia acincta Ratter & Cope, 1998 † - (FREJIDAE) (FOSSIL)
- acinella, Colpospira acinella A.C. Chapman & I. Crespin, 1928 † - (TURRITELLIDAE) (FOSSIL)
- acinetus, Prospondylus acinetus Newell & Boyd, 1970 † - (PSEUDOMONOTIDAE) (FOSSIL)
- Acinodrillia, Genus Acinodrillia R.N. Kilburn, 1988 (DRILLIIDAE)
- Acinolaemus, Genus Acinolaemus B.H. Thomson & E.S. Upatham, 1997 (HYPSELOSTOMATIDAE)
- acinonyx, Natica acinonyx I. Marche-Marchad, 1957 - (NATICIDAE)
- acinonyx, Hemilienardia acinonyx Fedosov, Stahlschmidt, Puillandre, Aznar-Cormano & Bouchet, 2017 - (RAPHITOMIDAE)
- Acinopsis, syn of: Genus Alvania A. Risso, 1826 (RISSOIDAE)
- Acinopsis, syn of: Genus Alvania A. Risso, 1826 (RISSOIDAE)
- acinosa, Cuthona acinosa (J.J. Risbec, 1928) - (FIONIDAE)
- acinosa, Nassa acinosa A.A. Gould, 1850 - syn of: Nassarius gruneri (R.W. Dunker, 1846) - (NASSARIIDAE)
- acinosa, Peronia acinosa A.A. Gould, 1852 - syn of: Onchidina australis (C.G. Semper, 1880) - (ONCHIDIIDAE)
- acinosa, Onchidina acinosa A.A. Gould, 1852 - syn of: Onchidina australis (C.G. Semper, 1880) - (ONCHIDIIDAE)
- acinosus, Trochus acinosus A.A. Gould, 1849 - syn of: Coelotrochus viridis (J.F. Gmelin, 1791) - (TROCHIDAE)
- acinula, Malletia acinula W.H. Dall, 1890 - syn of: Ledella acinula (W.H. Dall, 1890) - (MALLETIIDAE)
- acinula, Neilonella acinula W.H. Dall, 1890 - syn of: Ledella acinula (W.H. Dall, 1890) - (NEILONELLIDAE)
- acinula, Ledella acinula (W.H. Dall, 1890) - (NUCULANIDAE)
- acinula, Tindaria acinula W.H. Dall, 1890 - syn of: Ledella acinula (W.H. Dall, 1890) - (TINDARIIDAE)
- Acinulus, syn of: Genus Alvania A. Risso, 1826 (RISSOIDAE)
- Acinus, syn of: Genus Alvania A. Risso, 1826 (RISSOIDAE)
- Aciona, syn of: Genus Epitonium P.F. Rφding, 1798 (EPITONIIDAE)
- Acirsa, Genus Acirsa O.A.L. Mφrch, 1857 (EPITONIIDAE)
- Acirsella, Subgenus Acirsa (Acirsella) De Boury, 1886 (EPITONIIDAE) (FOSSIL)
- ackermanni, Ammonitoceras ackermanni Krenkel, 1910 † - (ANCYLOCERATIDAE) (FOSSIL)
- acklini, Paracenoceras acklini Jeannet, 1951 † - (PARACENOCERATIDAE) (FOSSIL)
- acklinsense, Chondropoma glabratum acklinsense P. Bartsch, 1946 - (POMATIIDAE)
- acklinsensis, Opisthosiphon acklinsensis P. Bartsch, 1946 - (POMATIIDAE)
- acleiformis, Dolicholatirus acleiformis G.B. I Sowerby, 1830 - syn of: Dolicholatirus lancea (J.F. Gmelin, 1791) - (FASCIOLARIIDAE)
- Acleistoceras, Genus Acleistoceras Hyatt, 1884 (ACLEISTOCERATIDAE) (FOSSIL)
- ACLEISTOCERATIDAE Flower, 1950 - Family (CEPHALOPODA-NAUTILOIDEA-ONCOCERIDA) (FOSSIL)
- acleonta, Metanachis acleonta P.L. Duclos, 1835 - syn of: Metanachis jaspidea (G.B. II Sowerby, 1844) - (COLUMBELLIDAE)
- Aclesia, syn of: Genus Aplysia C. Linnaeus, 1767 (APLYSIIDAE)
- Aclesia, syn of: Genus Bursatella H.M.D. De Blainville, 1817 (APLYSIIDAE)
- Acliceratia, Genus Acliceratia W.F. Ponder, 1984 (IRAVADIIDAE)
- ACLIDIDAE G.O. Sars, 1878 - Family (GASTROPODA-CAENOGASTROPODA-LITTORINIMORPHA)
- aclimus, Nassarius aclimus J.C. Melvill, 1918 - syn of: Nassarius delicatus (A. Adams, 1852) - (NASSARIIDAE)
- aclines, Euchondria aclines Liang, 1980 † - (EUCHONDRIIDAE) (FOSSIL)
- aclinica, Placunanomia aclinica H.I. Tucker & D. Wilson, 1933 † - (ANOMIIDAE) (FOSSIL)
- aclinica, Tritonoharpa aclinica (Tucker & R.B. Wilson, 1932 †) - (CANCELLARIIDAE) (FOSSIL)
- aclinica, Colubraria aclinica H.I. Tucker & D. Wilson, 1933 - syn of: Tritonoharpa lanceolata (K.T. Menke, 1828) - (COLUBRARIIDAE)
- aclinica, Cymatosyrinx aclinica Tucker & Wilson, 1933 † - (DRILLIIDAE) (FOSSIL)
- aclinica, Terebra aclinica A.A. Olsson, 1967 † - (TEREBRIDAE) (FOSSIL)
- aclinisa, Trigonia aclinisa Dickan, 1990 † - (TRIGONIIDAE) (FOSSIL)
- Aclis, Genus Aclis S.L. Lovιn, 1846 (ACLIDIDAE)
- aclis, Eulima aclis A. Adams, 1851 - (EULIMIDAE)
- aclis, Hyolithes aclis J.W. Hall, 1879 † - (HYOLITHIDAE) (FOSSIL)
- aclis, Rissosyrnola aclis (A. Adams, 1853) - (PYRAMIDELLIDAE)
- Aclisina, Genus Aclisina de Koninck, 1881 (MURCHISONIIDAE) (FOSSIL)
- Aclistothyra, Genus Aclistothyra J.T.L. McGinty, 1955 (GALEOMMATIDAE)
- acloneta, Drillia acloneta W.H. Dall, 1889 - syn of: Inodrillia acloneta (W.H. Dall, 1889) - (DRILLIIDAE)
- acloneta, Inodrillia acloneta (W.H. Dall, 1889) - (HORAICLAVIDAE)
- acloneta, Mangelia acloneta W.H. Dall, 1889 - syn of: Inodrillia acloneta (W.H. Dall, 1889) - (MANGELIIDAE)
- acloneta, Moerella acloneta W.H. Dall, 1900 † - (TELLINIDAE) (FOSSIL)
- Aclophora, Genus Aclophora C.F. Laseron, 1958 (TRIPHORIDAE)
- Aclophoropsis, Genus Aclophoropsis B.A. Marshall, 1983 (TRIPHORIDAE)
- aclopus, Planorbarius aclopus J.R. Bourguignat, 1856 - syn of: Planorbarius dufourii (M.de la Paz Graells, 1846) - (PLANORBIDAE)
- aclyformis, Syrnola aclyformis J. Marwick, 1929 † - (PYRAMIDELLIDAE) (FOSSIL)
- Aclyvolva, Genus Aclyvolva J. Cate, 1973 (OVULIDAE)
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