- Apocrinoceras, Genus Apocrinoceras Teichert & Glenister, 1954 † (APOCRINOCERATIDAE) (FOSSIL)
- APOCRINOCERATIDAE Teichert & Teichert, 1954 † - Family (CEPHALOPODA-NAUTILOIDEA-DISCOSORIDA) (FOSSIL)
- apocrypha, Agathotoma apocrypha (E.F. Garcia, 2008) - (MANGELIIDAE)
- apocryptus, Aegopinella apocryptus P. Fagot, 1884 - syn of: Aegopinella nitens (A. Michaud, 1831) - (ZONITIDAE)
- apodema, Euthriostoma saharicum apodema P. Bouchet & F.F. Talavera, 1981 - (BUCCINIDAE)
- apodema, Cuspidaria apodema W.H. Dall, 1916 - (CUSPIDARIIDAE)
- apodema, Metzgeria apodema P. Bouchet & F.F. Talavera, 1981 - syn of: Euthriostoma saharicum (É.A.A. Locard, 1897) - (PTYCHATRACTIDAE)
- apodema, Venus apodema W.H. Dall, 1902 - syn of: Mercenaria campechiensis (J.F. Gmelin, 1791) - (VENERIDAE)
- apodemeta, Helix apodemeta D'Orbigny, 1835 - syn of: Bulimulus apodemetes (A.V.M.D. D'Orbigny, 1835) - (HELICIDAE)
- apodemetes, Bulimulus apodemetes (A.V.M.D. D'Orbigny, 1835) - (BULIMULIDAE)
- apodemetes, Galeodea apodemetes J. Marwick, 1934 † - (CASSIDAE) (FOSSIL)
- apodemetes dispar, Bulimulus apodemetes dispar M.I. Hylton-Scott, 1952 - (BULIMULIDAE)
- apodensata, Venericardia apodensata † - (CARDITIDAE) (FOSSIL)
- apodensata, Venericor apodensata (Gardner & E. Bowles, 1939 †) - (CARDITIDAE) (FOSSIL)
- Apoderoceras, Genus Apoderoceras Lóczy, 1915 † (COELOCERATIDAE) (FOSSIL)
- Apodoceras, syn of: Genus Apoderoceras Lóczy, 1915 † (COELOCERATIDAE) (FOSSIL)
- Apodosis, Genus Apodosis H.A. Pilsbry & J.T.L. McGinty, 1949 (ELLOBIIDAE)
- Apoecus, Genus Apoecus W. Kobelt, 1902 (CERASTUIDAE)
- apoensis, Zeadmete apoensis A. Verhecken, 2011 - (CANCELLARIIDAE)
- Apogonoceras, Genus Apogonoceras Ruzhentsev & Shimanskiy, 1954 † (TRIGONOCERATIDAE) (FOSSIL)
- apoia, Clavatula apoia J. Gardner, 1937 † - (CLAVATULIDAE) (FOSSIL)
- apoiensis, Paraegista apoiensis T. Habe, 1970 - (BRADYBAENIDAE)
- apoikistes, Platevindex apoikistes S. Tillier, 1983 - syn of: Semperoncis montana (H.P. Plate, 1893) - (ONCHIDIIDAE)
- apoikistes, Oncis apoikistes S. Tillier, 1983 - syn of: Semperoncis montana (H.P. Plate, 1893) - (ONCHIDIIDAE)
- apolegma, Hypselodoris apolegma (N. Yonow, 2001) - (CHROMODORIDIDAE)
- apolinari, Plekocheilus apolinari H.A. Pilsbry, 1935 - (AMPHIBULIMIDAE)
- apolinari, Colchidites apolinari (Royo & R. Gomez, 1945 †) - (ANCYLOCERATIDAE) (FOSSIL)
- apolinari, Euglandina apolinari H.A. Pilsbry, 1935 - (SPIRAXIDAE)
- apollinaria, Pedioceras apollinaria Basse, 1948 † - (ANCYLOCERATIDAE) (FOSSIL)
- apollinea, Leiocithara apollinea (J.C. Melvill, 1904) - (MANGELIIDAE)
- apollinis, Cathaica apollinis E.C. Von Martens, 1882 - syn of: Archaica apollinis (E.C. Von Martens, 1882) - (BRADYBAENIDAE)
- apollinis, Capulus apollinis Böhm, 1895 † - (CAPULIDAE) (FOSSIL)
- apollinis, Naticopsis apollinis J. Perner, 1907 † - (DELPHINULOPSIDAE) (FOSSIL)
- apollinis, Helix apollinis E.C. Von Martens, 1882 - syn of: Archaica apollinis (E.C. Von Martens, 1882) - (HELICIDAE)
- apollinis, Archaica apollinis (E.C. Von Martens, 1882) - (HYGROMIIDAE)
- apollinis, Mitromorpha apollinis K.H.J. Thiele, 1925 - (MITROMORPHIDAE)
- apollinis nubila, Cathaica apollinis nubila W.A. Lindholm, 1931 - syn of: Archaica apollinis (E.C. Von Martens, 1882) - (BRADYBAENIDAE)
- apollo, Polydontes apollo L. Pfeiffer, 1860 - (CAMAENIDAE)
- apollo, Parainoceramya apollo (H.A. Leanza, 1942 †) - (INOCERAMIDAE) (FOSSIL)
- apollo, Murexsul apollo Espinosa & Ortea, 2016 - (MURICIDAE)
- apollo, Tarphyceras apollo (Billings, 1861 †) - (TARPHYCERATIDAE) (FOSSIL)
- Apollon, syn of: Genus Gyrineum J.H.F. Link, 1807 (RANELLIDAE)
- apolloniana, Barcania apolloniana R.A.M. Brandt, 1968 - (CLAUSILIIDAE)
- apollonicum, Anodonta apollonicum J.R. Bourguignat, 1880 - syn of: Anodonta anatina (C. Linnaeus, 1758) - (UNIONIDAE)
- apollyon, Octopus apollyon S.S. Berry, 1912 - syn of: Enteroctopus dofleini (G. Wülker, 1910) - (OCTOPODIDAE)
- apollyon, Polypus apollyon S.S. Berry, 1912 - syn of: Enteroctopus dofleini (G. Wülker, 1910) - (OCTOPODIDAE)
- apolonia, Emarginula apolonia J.M. Pacaud, 2015 - (FISSURELLIDAE)
- Apolymetis, Genus Apolymetis A. Salisbury, 1929 (TELLINIDAE)
- apolyonis, Neptunea apolyonis W.H. Dall, 1919 - syn of: Boreotrophon apolyonis (W.H. Dall, 1919) - (BUCCINIDAE)
- apolyonis, Boreotrophon apolyonis (W.H. Dall, 1919) - (MURICIDAE)
- apoma, Belloliva apoma Y.I. Kantor & P. Bouchet, 2007 - (OLIVIDAE)
- Apoma, Genus Apoma H.H. Beck, 1837 (UROCOPTIDAE)
- aponensis, Heleobia aponensis (E.C. Von Martens, 1858) - (COCHLIOPIDAE)
- Apoparmarion, Genus Apoparmarion W.E. Collinge, 1902 (ARIOPHANTIDAE)
- Apopitys, Genus Apopitys C.M. Cooke & Y. Kondo, 1960 (ACHATINELLIDAE)
- Apoptopegma, Genus Apoptopegma Pojeta & al., 1977 † (RIBEIRIIDAE) (FOSSIL)
- apora, Amauropsis apora (R.B. Watson, 1881) - (NATICIDAE)
- aporema, Favartia aporema Houart, 2016 - (MURICIDAE)
- Aporema, syn of: Genus Panacca W.H. Dall, 1905 (PARILIMYIDAE)
- aporema, Triphora aporema H.A. Rehder, 1980 - (TRIPHORIDAE)
- Aporemodon, Genus Aporemodon G.C. Robson, 1913 (SIPHONARIIDAE)
- aporia, Calliostoma aporia C. Vilvens, 2009 - (CALLIOSTOMATIDAE)
- aporina, Helix aporina J. Da Silva e Castro, 1887 - syn of: Ponentina subvirescens (J.C. Bellamy, 1839) - (HELICIDAE)
- Aporodoris, Genus Aporodoris H.F.A. von Ihering, 1886 (DORIDIDAE)
- APORRHAIDAE Gray, 1850 - Family (GASTROPODA-CAENOGASTROPODA-LITTORINIMORPHA)
- APORRHAIDIDAE - syn of Family: APORRHAIDAE
- APORRHAIIDAE - syn of Family: APORRHAIDAE
- Aporrhais, Genus Aporrhais A. da Costa, 1778 (APORRHAIDAE)
- Aposcutalus, Subgenus Scutalus (Aposcutalus) A.V.C. Dutra-Clarke & J.L.M. Leme 1985 (BULIMULIDAE)
- aposmithii, Venericor aposmithii (Gardner & E. Bowles, 1939 †) - (CARDITIDAE) (FOSSIL)
- apostata, Cochlostoma apostata C.A. Westerlund, 1890 - syn of: Cochlostoma sardoum C.A. Westerlund, 1890 - (COCHLOSTOMATIDAE)
- apostolicum, Rudolftruempyiceras apostolicum (Smith, 1932 †) - (COLUMBITIDAE) (FOSSIL)
- apostolicus, Celtites apostolicus Smith, 1932 † - syn of: Rudolftruempyiceras apostolicum (Smith, 1932 †) - (CELTITIDAE) (FOSSIL)
- apostolorum, Opalia apostolorum (T. Iredale, 1936) - (EPITONIIDAE)
- apostrema, Cranopsis apostrema L.R.L. Simone & C.M. Cunha, 2014 - (FISSURELLIDAE)
- apotegea, Carditamera apotegea Gardner, 1926 † - (CARDITIDAE) (FOSSIL)
- apothecia, Ortizius apothecia J.R. Bourguignat, 1894 - syn of: Oxychilus allarius (J.S. Miller, 1822) - (OXYCHILIDAE)
- Apotocardium, Genus Apotocardium Hoare, Mapes & Yancey, 2002 † (BRANSONIIDAE) (FOSSIL)
- appalachianus, Aviculopecten appalachianus Hoare & al., 1978 † - (AVICULOPECTINIDAE) (FOSSIL)
- appalachiensis, Dunbarella appalachiensis J. Lintz † - syn of: Dunbarella striata (Stevens, 1858 †) - (PTERINOPECTINIDAE) (FOSSIL)
- Appalachina, Subgenus Mesodon (Appalachina) H.A. Pilsbry, 1940 (POLYGYRIDAE)
- apparata, Chaetopleura apparata P.P. Carpenter in H.A. Pilsbry, 1892 - syn of: Calloplax janeirensis (J.E. Gray, 1828) - (CHAETOPLEURIDAE)
- apparata, Nerita apparata Cragin, 1893 † - (NERITIDAE) (FOSSIL)
- appeli, Ananias appeli Batten, 1989 † - (GOSSELETINIDAE) (FOSSIL)
- appeliana, Helix appeliana A. Mousson, 1876 - syn of: Euomphalia appeliana (A. Mousson, 1876) - (HELICIDAE)
- appeliana, Euomphalia appeliana (A. Mousson, 1876) - (HYGROMIIDAE)
- appelii, Vexillum appelii (C.F. Jickeli, 1874) - (COSTELLARIIDAE)
- appelii, Cingulifera cingulatum appelii (W. Kobelt, 1876) - (HELICIDAE)
- appelii, Hindsiclava appelii (H.C. Weinkauff & W. Kobelt, 1876) - (PSEUDOMELATOMIDAE)
- appeliusi, Abida appeliusi C.A. Westerlund, 1892 - syn of: Abida secale (J.P.R. Draparnaud, 1801) - (CHONDRINIDAE)
- appeliusi, Odetta appeliusi (A. Hornung & G. Mermod, 1925) - (PYRAMIDELLIDAE)
- appelloefi, Onykia appelloefi (G.J. Pfeffer, 1900) - (ONYCHOTEUTHIDAE)
- appelloefi, Sepia appelloefi G. Wülker, 1910 - (SEPIIDAE)
- appendiculata, Pellicula appendiculata (L. Pfeiffer, 1847) - (AMPHIBULIMIDAE)
- appendiculata, Amphibulima appendiculata L. Pfeiffer, 1847 - syn of: Pellicula appendiculata (L. Pfeiffer, 1847) - (AMPHIBULIMIDAE)
- appendiculata, Barbatia appendiculata (Sowerby, 1820 †) - (ARCIDAE) (FOSSIL)
- appendiculata, Armina appendiculata K. Baba, 1949 - (ARMINIDAE)
- appendiculata, Figuladra appendiculata (L.A. Reeve, 1854) - (CAMAENIDAE)
- appendiculata, Lamprocystis appendiculata (O.F. von Möllendorff, 1893) - (EUCONULIDAE)
- appendiculata, Spirialis appendiculata J.P.L. Pelseneer, 1888 - syn of: Heliconoides inflatus (A.V.M.D. D'Orbigny, 1834) - (LIMACINIDAE)
- appendiculata, Modiolus appendiculata R.A. Philippi, 1846 - syn of: Leiosolenus appendiculatus (R.A. Philippi, 1846) - (MYTILIDAE)
- Appendiculata, syn of: Genus Segmentina J. Fleming, 1822 (PLANORBIDAE)
- appendiculata, Gari appendiculata (J.B.P.A. Lamarck, 1806 †) - (PSAMMOBIIDAE) (FOSSIL)
- appendiculata, Pisidium appendiculata W. Turton, 1831 - syn of: Pisidium henslowanum (R. Sheppard, 1825) - (SPHAERIIDAE)
- appendiculata, Succinea appendiculata L. Pfeiffer, 1847 - syn of: Pellicula appendiculata (L. Pfeiffer, 1847) - (SUCCINEIDAE)
- appendiculata, Tritonia appendiculata C.N.E. Eliot, 1905 - syn of: Tritonia challengeriana L.S.R. Bergh, 1884 - (TRITONIIDAE)
- appendiculata planicostata, Barbatia appendiculata planicostata (G.P. Deshayes, 1829 ) - (ARCIDAE)
- appendiculatum, Chondropoma laetum appendiculatum C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- appendiculatus, Thersites appendiculatus L.A. Reeve, 1854 - syn of: Figuladra appendiculata (L.A. Reeve, 1854) - (CAMAENIDAE)
- appendiculatus, Cyclophorus appendiculatus (L. Pfeiffer, 1851) - (CYCLOPHORIDAE)
- appendiculatus, Megaxinus appendiculatus (É.A.A. Locard, 1898) - (LUCINIDAE)
- appendiculatus, Leiosolenus appendiculatus (R.A. Philippi, 1846) - (MYTILIDAE)
- appendiculatus brachyglossus, Cyclophorus appendiculatus brachyglossus O.F. von Möllendorff, 1898 - (CYCLOPHORIDAE)
- appeninensis, Rimella appeninensis (F. Sacco, 1893 †) - (RIMELLIDAE) (FOSSIL)
- appenninica remensa, Sassia appenninica remensa T. Iredale, 1936 - syn of: Sassia remensa (T. Iredale, 1936) - (RANELLIDAE)
- appenninicus, Polyplectus appenninicus F. Haas, 1913 † - (HILDOCERATIDAE) (FOSSIL)
- Appenninoceras, Genus Appenninoceras Meister & Dommergues, 2011 † (EODEROCERATIDAE) (FOSSIL)
- apperiens, Orthoceras apperiens Barrande, 1860 † - syn of: Sphooceras truncatum (Barrande, 1860 †) - (ORTHOCERATIDAE) (FOSSIL)
- Appisania, syn of: Genus Pisania Ant. Bivona-Bernardi, 1832 (BUCCINIDAE)
- Appius, syn of: Genus Cristaria H.C.F. Schumacher, 1817 (UNIONIDAE)
- applanans, Nucula applanans Barrande, 1881 † - syn of: Praenucula applanans (Barrande, 1881 †) - (NUCULIDAE) (FOSSIL)
- applanans, Praenucula applanans (Barrande, 1881 †) - (PRAENUCULIDAE) (FOSSIL)
- applanata, Plectotropis applanata O.F. von Möllendorff, 1884 - (BRADYBAENIDAE)
- applanata, Cymaclymenia applanata Pajchlowa, 1972 † - (CYMACLYMENIIDAE) (FOSSIL)
- applanata, Marmolatella applanata E.A.L. Kittl, 1894 † - (DELPHINULOPSIDAE) (FOSSIL)
- applanata, Holopea applanata Lindström, 1884 † - (HOLOPEIDAE) (FOSSIL)
- applanata, Micromelania applanata (A. Fuchs, 1873 †) - (HYDROBIIDAE) (FOSSIL)
- applanata, Pararaphistoma applanata E.F.R.K. Koken, 1897 † - syn of: Pararaphistoma vaginati (E.F.R.K. Koken & J. Perner, 1925 †) - (LESUEURILLIDAE) (FOSSIL)
- applanata, Melanopsis turriformis applanata H. Schütt, 1993 † - (MELANOPSIDAE) (FOSSIL)
- applanata, Pseudoclymenia applanata Schindewolf, 1923 † - (PSEUDOCLYMENIIDAE) (FOSSIL)
- applanata, Purpuroidea applanata E.A.L. Kittl, 1894 † - (PURPUROIDEIDAE) (FOSSIL)
- applanata, Herviera applanata (J.C. Melvill, 1893) - (PYRAMIDELLIDAE)
- applanata, Raphistoma applanata E.F.R.K. Koken & J. Perner, 1925 † - syn of: Pararaphistoma vaginati (E.F.R.K. Koken & J. Perner, 1925 †) - (RAPHISTOMATIDAE) (FOSSIL)
- applanata, Rissoina applanata J.C. Melvill, 1893 - (RISSOINIDAE)
- applanata, Ilsanella applanata Parkhaev, 2001 † - (SCENELLIDAE) (FOSSIL)
- applanata, Epiwocklumeria applanata (Wedekind, 1918 †) - (WOCKLUMERIIDAE) (FOSSIL)
- applanata, Gollumia applanata H. Schütt, 2001 - (ZONITIDAE)
- applanatum, Agathiceras applanatum Teichert, 1944 † - (AGATHICERATIDAE) (FOSSIL)
- applanatum, Dentalium applanatum Torley, 1908 - syn of: Rhomboxiphus colmani (K.V.W. Palmer, 1974) - (DENTALIIDAE)
- applanatum, Bathoxiphus applanatum P.H. Colman, 1958 - syn of: Rhomboxiphus colmani (K.V.W. Palmer, 1974) - (ENTALINIDAE)
- applanatum, Acutimitoceras applanatum (Ruan, 1981 †) - (GATTENDORFIIDAE) (FOSSIL)
- applanatum, Pseudocenoceras applanatum (C.A. von Zittel, 1902 †) - (NAUTILIDAE) (FOSSIL)
- applanatum, Blanfordiceras applanatum Uhlig, 1910 † - (NEOCOMITIDAE) (FOSSIL)
- applanatum, Onchidium applanatum H.R. Simroth, 1918 - (ONCHIDIIDAE)
- applanatum, Extropharciceras applanatum (Bensaid, 1974 †) - (PHARCICERATIDAE) (FOSSIL)
- applanatum, Pharciceras applanatum Bensaid, 1974 † - syn of: Extropharciceras applanatum (Bensaid, 1974 †) - (PHARCICERATIDAE) (FOSSIL)
- applanatum, Pharciceras applanatum Bensaid, 1974 † - syn of: Extropharciceras applanatum (Bensaid, 1974 †) - (PHARCICERATIDAE) (FOSSIL)
- applanatum, Pinacoceras applanatum Mojsisovics, 1873 † - syn of: Megaphyllites applanatus (Mojsisovics, 1873 †) - (PINACOCERATIDAE) (FOSSIL)
- applanatum, Platyschisma applanatum C.L.F. von Sandberger & C.L.F. von Sandberger, 1855 † - (PLATYCERATIDAE) (FOSSIL)
- applanatum, Pseudoprobeloceras applanatum (Wedekind, 1918 †) - (PONTICERATIDAE) (FOSSIL)
- applanatum, Imitoceras applanatum Ruan, 1981 † - syn of: Acutimitoceras applanatum (Ruan, 1981 †) - (PRIONOCERATIDAE) (FOSSIL)
- applanatus, Anarcestes applanatus Frech, 1897 † - (ANARCESTIDAE) (FOSSIL)
- applanatus, Xiangulingites applanatus J.K. Zhao & al., 1978 † - (ANDERSSONOCERATIDAE) (FOSSIL)
- applanatus, Manuaniceras applanatus M. Collignon, 1936 † - (BRANCOCERATIDAE) (FOSSIL)
- applanatus, Ceratites applanatus Smith, 1914 † - syn of: Frechites occidentalis (Smith, 1914 †) - (CERATITIDAE) (FOSSIL)
- applanatus, Triassocirrus applanatus (Kutassy, 1937 †) - (EUOMPHALINA (unassigned)) (FOSSIL)
- applanatus, Neogloborilus applanatus Z.X. Qian & Zhang, 1983 † - (GLOBORILIDAE) (FOSSIL)
- applanatus, Cyclolituites applanatus (Remele, 1880 †) - (LITUITIDAE) (FOSSIL)
- applanatus, Maclurites applanatus Kutassy, 1937 † - syn of: Triassocirrus applanatus (Kutassy, 1937 †) - (MACLURITIDAE) (FOSSIL)
- applanatus, Megaphyllites applanatus (Mojsisovics, 1873 †) - (MEGAPHYLLITIDAE) (FOSSIL)
- applanatus, Dicosmos applanatus Kutassy, 1937 † - (NATICOPSIDAE) (FOSSIL)
- applanatus, Hengestites applanatus R. Casey 1960 † - (PLACENTICERATIDAE) (FOSSIL)
- applanatus, Gyraulus applanatus (Thomä, 1845 †) - (PLANORBIDAE) (FOSSIL)
- applanatus kleini, Gyraulus applanatus kleini F. Gottschick & W.A. Wenz, 1916 † - syn of: Gyraulus kleini (F. Gottschick & W.A. Wenz, 1916 †) - (PLANORBIDAE) (FOSSIL)
- applenum, Ataxocerithium applenum T. Iredale, 1936 - (NEWTONIELLIDAE)
- applicata, Periplomya applicata (T.A. Conrad, 1858 †) - (LATERNULIDAE) (FOSSIL)
- applini, Agathiceras applini Plummer & P.H. Scott, 1937 † - (AGATHICERATIDAE) (FOSSIL)
- apporrecta, Terebra apporrecta B.M. Landau, F. Da Silva & S.M. Heitz, 2016 † - (TEREBRIDAE) (FOSSIL)
- apposita, Mitra apposita L.M.D. Bellardi, 1887 † - (MITRIDAE) (FOSSIL)
- appressa, Pseudochama appressa L.A. Reeve, 1847 - syn of: Pseudochama cristella (J.B.P.A. Lamarck, 1819) - (CHAMIDAE)
- appressa, Astyris appressa W.H. Dall, 1927 - (COLUMBELLIDAE)
- appressa, Drillia appressa P.P. Carpenter, 1864 - syn of: Crassispira appressa (P.P. Carpenter, 1864) - (DRILLIIDAE)
- appressa, Holopea appressa Ulrich & Scofield, 1897 † - (HOLOPEIDAE) (FOSSIL)
- appressa, Lymnaea stagnalis appressa T. Say, 1821 - (LYMNAEIDAE)
- appressa, Striostrea appressa (W.M. Gabb, 1869 †) - (OSTREIDAE) (FOSSIL)
- appressa, Crassispira appressa (P.P. Carpenter, 1864) - (PSEUDOMELATOMIDAE)
- appressa, Schizopea appressa Ulrich & al., 1931 † - syn of: Schizopea subrotunda Ulrich & al., 1931 † - (SINUOPEIDAE) (FOSSIL)
- appressicostata, Epitonium appressicostata W.H. Dall, 1917 - syn of: Epitonium politum (G.B. II Sowerby, 1844) - (EPITONIIDAE)
- appressicostatum, Depressiscala appressicostatum W.H. Dall, 1917 - syn of: Epitonium politum (G.B. II Sowerby, 1844) - (EPITONIIDAE)
- appressicostatum, Epitonium appressicostatum W.H. Dall, 1917 - syn of: Epitonium politum (G.B. II Sowerby, 1844) - (EPITONIIDAE)
- appressum, Pisidium appressum B. Prashad, 1933 - (SPHAERIIDAE)
- appressum, Aristoceras appressum Ruzhentsev, 1950 † - (THALASSOCERATIDAE) (FOSSIL)
- appressus, Fusus appressus E.C. Von Martens, 1901 - syn of: Fusinus albinus (A. Adams, 1856) - (FASCIOLARIIDAE)
- appressus, Mesodon appressus (T. Say, 1821) - (POLYGYRIDAE)
- apprimapex, Cancilla apprimapex G.T. Poppe, S.P. Tagaro & R. Salisbury, 2009 - (MITRIDAE)
- apprimatum, Manticoceras sinuosum apprimatum (A.H. Clarke, 1898 †) - (GEPHUROCERATIDAE) (FOSSIL)
- apprimus, Crepipatella apprimus E.H. Vokes, 1975 † - (CALYPTRAEIDAE) (FOSSIL)
- apprimus, Diplodon wymanii apprimus (I. Lea, 1866) - (HYRIIDAE)
- apprimus, Unio apprimus I. Lea, 1866 - syn of: Diplodon wymanii apprimus (I. Lea, 1866) - (UNIONIDAE)
- approxima, Pisinna approxima W.F. Petterd, 1884 - syn of: Pisinna approximata (W.F. Petterd, 1884) - (ANABATHRIDAE)
- approxima, Retinella approxima B. Walker & H.A. Pilsbry, 1902 - (ZONITIDAE)
- approximans, Acanthochitona approximans (C. Hedley & A.F.B. Hull, 1912) - (ACANTHOCHITONIDAE)
- approximans, Leptachatina approximans C.M.F. Ancey, 1897 - (AMASTRIDAE)
- approximans, Archinacella approximans E.F.R.K. Koken & J. Perner, 1925 † - (ARCHINACELLIDAE) (FOSSIL)
- approximans, Erjaveciella approximans (A. Schmidt, 1857) - (CLAUSILIIDAE)
- approximans, Corbicula approximans H.B. Preston, 1914 - syn of: Corbicula limosa (W.G. Maton, 1809) - (CYRENIDAE)
- approximans, Poleumita approximans J. Perner, 1903 † - syn of: Oriostoma approximans (J. Perner, 1903 †) - (EUOMPHALIDAE) (FOSSIL)
- approximans, Peristernia approximans R. Tate, 1888 † - (FASCIOLARIIDAE) (FOSSIL)
- approximans, Flabellina approximans L.S.R. Bergh, 1864 - syn of: Flabellina salmonacea (J.P.Y. Couthouy, 1838) - (FLABELLINIDAE)
- approximans, Coryphella bostoniensis approximans O.A.L. Mörch, 1877 - (FLABELLINIDAE)
- approximans, Spatha approximans H.B. Preston, 1910 - syn of: Chambardia nyassaensis (I. Lea, 1864) - (IRIDINIDAE)
- approximans, Nostoceras approximans (T.A. Conrad, 1855 †) - (NOSTOCERATIDAE) (FOSSIL)
- approximans, Nuculana approximans B. Prashad, 1932 - (NUCULANIDAE)
- approximans, Oriostoma approximans (J. Perner, 1903 †) - (ORIOSTOMATIDAE) (FOSSIL)
- approximans, Philine approximans P. Dautzenberg & H. Fischer, 1896 - (PHILINIDAE)
- approximans, Inflectarius approximans (W.F. Clapp, 1905) - (POLYGYRIDAE)
- approximans, Ptychocaulus approximans J. Perner, 1907 † - syn of: Ptychocaulus verneuili (E.F.R.K. Koken, 1889 †) - (PTYCHOCAULIDAE) (FOSSIL)
- approximans, Kongsrudia approximans (P. Dautzenberg, 1912) - (PYRAMIDELLIDAE)
- approximans, Pyrgulina approximans P. Dautzenberg, 1912 - syn of: Kongsrudia approximans (P. Dautzenberg, 1912) - (PYRAMIDELLIDAE)
- approximans, Succinea approximans R.J. Shuttleworth, 1854 - (SUCCINEIDAE)
- approximata, Pisinna approximata (W.F. Petterd, 1884) - (ANABATHRIDAE)
- approximata, Arca approximata J.M.R.M. Viader, 1951 - syn of: Samacar strabo (C. Hedley, 1915) - (ARCIDAE)
- approximata, Mitrella approximata G.B. III Sowerby, 1920 - syn of: Mitrella albuginosa (L.A. Reeve, 1859) - (COLUMBELLIDAE)
- approximata, Columbella approximata G.B. III Sowerby, 1920 - syn of: Mitrella albuginosa (L.A. Reeve, 1859) - (COLUMBELLIDAE)
- approximata, Mitrella approximata W.H. Turton, 1932 - syn of: Mitrella natalensis (J.R. le B. Tomlin, 1926) - (COLUMBELLIDAE)
- approximata, Cuspidaria approximata E.A. Smith, 1896 - (CUSPIDARIIDAE)
- approximata, Radobornia approximata (G.P. Deshayes, 1863) - (KELLIIDAE)
- approximata, Liralucina approximata (W.H. Dall, 1901) - (LUCINIDAE)
- approximata, Nassa approximata W.H. Pease, 1868 - syn of: Nassarius olivaceus (J.G. Bruguière, 1789) - (NASSARIIDAE)
- approximata, Magnatica approximata (H.H. Suter, 1917 †) - (NATICIDAE) (FOSSIL)
- approximata, Porphyrobaphe approximata H.C. Fulton, 1896 - (ORTHALICIDAE)
- approximata, Partula approximata W.H. Pease - (PARTULIDAE)
- approximata, Turbonilla approximata (W.H. Dall & P. Bartsch, 1906) - (PYRAMIDELLIDAE)
- approximata, Chemnitzia approximata W.H. Dall & P. Bartsch, 1906 - syn of: Turbonilla approximata (W.H. Dall & P. Bartsch, 1906) - (PYRAMIDELLIDAE)
- approximata, Solariella approximata Bell, 1893 † - (SOLARIELLIDAE) (FOSSIL)
- approximata, Stereoplasmocerina approximata Sweet, 1958 † - (STEREOPLASMOCERATIDAE) (FOSSIL)
- approximata, Succinea approximata G.B. Sowerby, 1872 - (SUCCINEIDAE)
- approximata, Terebra approximata G.P. Deshayes, 1859 - syn of: Myurella undulata (J.E. Gray, 1834) - (TEREBRIDAE)
- approximata, Trochomorpha approximata E.J. Le Guillou - (TROCHOMORPHIDAE)
- approximatum, Pusia approximatum (W.H. Pease, 1860) - (COSTELLARIIDAE)
- approximatum, Diestoceras approximatum (F. McCoy, 1846 †) - (DIESTOCERATIDAE) (FOSSIL)
- approximatum, Orthodesma approximatum Foerste, 1914 † - (MODIOMORPHIDAE) (FOSSIL)
- approximatum, Poterioceras approximatum F. McCoy, 1846 † - syn of: Diestoceras approximatum (F. McCoy, 1846 †) - (POTERIOCERATIDAE) (FOSSIL)
- approximatus, Naesiotus approximatus W.H. Dall, 1900 - (BULIMULIDAE)
- approximatus, Cryptoconus priscus approximatus (G.P. Deshayes, 1865 †) - (CONIDAE) (FOSSIL)
- approximatus, Streptochetus approximatus (G.P. Deshayes, 1865 †) - (FASCIOLARIIDAE) (FOSSIL)
- approximatus, Phacoides approximatus W.H. Dall, 1901 - syn of: Liralucina approximata (W.H. Dall, 1901) - (LUCINIDAE)
- approximatus, Murex approximatus G.B. II Sowerby, 1879 - syn of: Chicoreus brevifrons (J.B.P.A. Lamarck, 1822) - (MURICIDAE)
- Appudiceras, Genus Appudiceras Whitehouse, 1926 † (DIPOLOCERATIDAE) (FOSSIL)
- appuni, Plekocheilus appuni R.W. Dunker, 1875 - (AMPHIBULIMIDAE)
- appuni, Helicina tamsiana appuni (E.C. Von Martens, 1873) - (HELICINIDAE)
- Appurdiceras, Subgenus Labeceras (Appurdiceras) Henderson, 1990 † (LABECERATIDAE) (FOSSIL)
- apragmosyne, Vestiella roschitzi apragmosyne (A.J. Wagner, 1919) - (CLAUSILIIDAE)
- aprathensis, Euchondria aprathensis Rathmann & Amler, 1992 † - (EUCHONDRIIDAE) (FOSSIL)
- apressus, Mesodon apressus T. Say, 1821 - syn of: Mesodon appressus (T. Say, 1821) - (POLYGYRIDAE)
- aprica, Melanopsis cossoni aprica J.R. Bourguignat, 1884 - (MELANOPSIDAE)
- aprica, Gascoignella aprica K.R. Jensen, 1985 - (PLATYHEDYLIDAE)
- aprica, Westralaoma aprica T. Iredale, 1939 - (PUNCTIDAE)
- aprica, Catinella aprica L.R. Hubricht, 1968 - (SUCCINEIDAE)
- Apricardia, Genus Apricardia Guéranger, 1853 † (REQUIENIIDAE) (FOSSIL)
- apricensis, Radix apricensis G.B. Adami, 1876 - syn of: Radix labiata (E.A. Rossmässler, 1835) - (LYMNAEIDAE)
- apricum, Cochlostoma apricum A. Mousson, 1847 - (COCHLOSTOMATIDAE)
- apricum, Davouxiceras apricum (Giovine, 1952 †) - (EMERICICERATIDAE) (FOSSIL)
- aprimapex, Cancilla aprimapex G.T. Poppe, S.P. Tagaro & R. Salisbury, 2009 - syn of: Cancilla apprimapex G.T. Poppe, S.P. Tagaro & R. Salisbury, 2009 - (MITRIDAE)
- aprinum, Dentalium aprinum C. Linnaeus, 1767 - (DENTALIIDAE)
- aprinum incolor, Dentalium aprinum incolor M. Boissevain, 1906 - syn of: Dentalium aprinum C. Linnaeus, 1767 - (DENTALIIDAE)
- aprinum taiwanum, Dentalium aprinum taiwanum J.T. Kuroda, 1941 - syn of: Dentalium aprinum C. Linnaeus, 1767 - (DENTALIIDAE)
- apronensis, Aegopinella apronensis E. Caziot, 1910 - syn of: Aegopinella nitens (A. Michaud, 1831) - (ZONITIDAE)
- aprosceptum, Calliostoma aprosceptum C. Vilvens, 2009 - (CALLIOSTOMATIDAE)
- aprosdoketa, Gulella aprosdoketa M. Connolly, 1939 - (STREPTAXIDAE)
- Aprosphyma, syn of: Genus Megalophaedusa O. Böttger, 1877 (CLAUSILIIDAE)
- aprustica, Pyramidella aprustica Crema, 1903 - syn of: Euparthenia bulinea (R.T. Lowe, 1841) - (PYRAMIDELLIDAE)
- aprutica, Pyrostoma plicatula aprutica H. Nordsieck, 2006 - (CLAUSILIIDAE)
- apsa, Turbonilla apsa P. Bartsch, 1915 - (PYRAMIDELLIDAE)
- apsara, Sisenna apsara Delpey, 1941 † - (PLEUROTOMARIIDAE) (FOSSIL)
- Apscheronia, Genus Apscheronia Andrusov, 1903 † (BIVALVIA INCERTAE SEDIS) (FOSSIL)
- Apsidoceras, Genus Apsidoceras Hyatt, 1884 † (APSIDOCERATIDAE) (FOSSIL)
- APSIDOCERATIDAE Hyatt, 1884 † - Family (CEPHALOPODA-NAUTILOIDEA-BARRANDEOCERIDA) (FOSSIL)
- Apsorroceras, Genus Apsorroceras Hyatt, 1900 † (AMMONOIDEA (unassigned)) (FOSSIL)
- apta, Liracassis apta (Tegland, 1931 †) - (CASSIDAE) (FOSSIL)
- apta, Crassispira apta K.H.J. Thiele, 1925 - (PSEUDOMELATOMIDAE)
- aptera, Cryoturris aptera W.P. Woodring, 1928 † - (MANGELIIDAE) (FOSSIL)
- aptera, Linucula aptera (C.R. Laws, 1940 †) - (NUCULIDAE) (FOSSIL)
- apticum, Proaustraliceras apticum (Glazunova, 1973 †) - (ANCYLOCERATIDAE) (FOSSIL)
- aptiense, Gargasiceras aptiense (G.F. Roch, 1926 †) - (DESHAYESITIDAE) (FOSSIL)
- aptiensis, Pseudobelus aptiensis (Stolley, 1913 †) - (DUVALIIDAE) (FOSSIL)
- aptiensis, Neohibolites aptiensis Stolley, 1913 † - syn of: Pseudobelus aptiensis (Stolley, 1913 †) - (MESOHIBOLITHIDAE) (FOSSIL)
- aptiensis, Matheronia aptiensis Matheron, 1878 † - (REQUIENIIDAE) (FOSSIL)
- Aptolinter, Genus Aptolinter Casey, 1961 † (PARALLELODONTIDAE) (FOSSIL)
- aptos, Columbarium aptos M.G. Harasewych, 1986 - syn of: Coluzea aapta M.G. Harasewych, 1986 - (TURBINELLIDAE)
- aptum, Murleyiceras aptum Buckman, 1922 † - syn of: Hildaites murleyi Buckman, 1841 † - (HILDOCERATIDAE) (FOSSIL)
- aptum, Diagoceras aptum (J.W. Hall, 1876 †) - (SPYROCERATIDAE) (FOSSIL)
- aptus, Fossarus ambiguus aptus J.C. Melvill, 1912 - (PLANAXIDAE)
- aptycha, Partulina aptycha L. Pfeiffer, 1855 - (ACHATINELLIDAE)
- Aptycha, syn of: Genus Ringicula G.P. Deshayes, 1838 (RINGICULIDAE)
- aptychia, Pleurorima aptychia Barrande in J. Perner, 1907 † - (GOSSELETINIDAE) (FOSSIL)
- aptychoides, Conocardium aptychoides Barrande, 1881 † - (CONOCARDIIDAE) (FOSSIL)
- Aptycholathyrus, Genus Aptycholathyrus Cossman & Pissarro, 1905 † (FASCIOLARIIDAE) (FOSSIL)
- aptychus, Pseudonapaeus aptychus (C.M.F. Ancey, 1886) - (ENIDAE)
- aptyx, Serruluna aptyx H. Nordsieck, 2007 † - (CLAUSILIIDAE) (FOSSIL)
- aptyx, Thaumatoptyx aptyx H. Nordsieck, 2003 - (CLAUSILIIDAE)
- Aptyxiella, Genus Aptyxiella Fischer, 1885 † (NERINEIDAE) (FOSSIL)
- Aptyxis, Genus Aptyxis Troschel, 1865 † (FASCIOLARIIDAE) (FOSSIL)
- Aptyxis, syn of: Genus Fusinus C.S. Rafinesque, 1815 (FASCIOLARIIDAE)
- apuana, Chondrina apuana A. Issel, 1866 - syn of: Chondrina avenacea (J.G. Bruguière, 1792) - (CHONDRINIDAE)
- apuana, Clausilia apuana C. De Stefani, 1883 - syn of: Clausilia cruciata (S.E. Studer, 1820) - (CLAUSILIIDAE)
- apuana, Monacha apuana J.F. Mabille, 1881 - syn of: Eutheba cantiana (G. Montagu, 1803) - (HYGROMIIDAE)
- apuanum, Cingulifera cingulatum apuanum (A. Issel, 1866) - (HELICIDAE)
- apudalpha, Austrofusus apudalpha Finlay, 1926 † - (BUCCINIDAE) (FOSSIL)
- apudalpha, Mysella apudalpha C.R. Laws, 1944 † - (MONTACUTIDAE) (FOSSIL)
- apudornata, Scissurella apudornata C.R. Laws, 1935 † - (SCISSURELLIDAE) (FOSSIL)
- Apula, Genus Apula Boettger, 1909 † (ELONIDAE) (FOSSIL)
- apula, Ambigua fuscolabiata apula (W. Kobelt, 1897) - (HELICIDAE)
- apuliensis, Pseudopolyconites apuliensis Sladíc-Trifunovic & Campobasso, 1980 † - (RADIOLITIDAE) (FOSSIL)
- Apulites, Genus Apulites Tavani, 1958 † (RADIOLITIDAE) (FOSSIL)
- apuloense, Prolyelliceras apuloense Etayo Serna, 1979 † - (PROLYELLICERATIDAE) (FOSSIL)
- apunctata, Worthenia apunctata E.A.L. Kittl, 1894 † - (LOPHOSPIRIDAE) (FOSSIL)
- apurimacensis, Scutalus apurimacensis W.H. Dall, 1917 - syn of: Bostryx rhodolarynx apurimacensis W.H. Dall, 1917 - (BULIMULIDAE)
- apurimacensis, Bostryx rhodolarynx apurimacensis W.H. Dall, 1917 - (BULIMULIDAE)
- apus, Pinctada apus P.F. Röding, 1798 - syn of: Pteria hirundo (C. Linnaeus, 1758) - (PTERIIDAE)
- apusoides, Ribeiria apusoides G.H. Schubert & L. Waagen, 1904 † - (RIBEIRIIDAE) (FOSSIL)
- apyrahi, Turricostellaria apyrahi L.R.L. Simone & C.M. Cunha, 2012 - (COSTELLARIIDAE)
- apyrenum, Pleuroceras apyrenum (S.S. Buckman, 1911 †) - (AMALTHEIDAE) (FOSSIL)
- aqabaensis, Notoplax aqabaensis Vine, 1986 ex E.H.J. Leloup MS - syn of: Leptoplax curvisetosa (E.H.J. Leloup, 1960) - (ACANTHOCHITONIDAE)
- aqabaensis, Tomura aqabaensis K. Bandel, 2010 - (CORNIROSTRIDAE)
- aqabaensis, Hemiaclis aqabaensis K. Bandel, 2005 - (EULIMIDAE)
- aqabaensis, Zygoceras aqabaensis K. Bandel, 2007 - (HALOCERATIDAE)
- aqabaensis, Murchisonella aqabaensis (K. Bandel, 2005) - (MURCHISONELLIDAE)
- aqabaensis, Neritopsis aqabaensis K. Bandel, 2007 - (NERITOPSIDAE)
- aqabaensis, Sansonia aqabaensis Alhejoj, Bandel & Al-Najjar, 2016 - (PICKWORTHIIDAE)
- Aqabarella, Genus Aqabarella Alhejoj, Bandel & Al-Najjar, 2016 (AQABARELLIDAE)
- AQABARELLIDAE Alhejoj, Bandel & Al-Najjar, 2016 - Family (GASTROPODA-CAENOGASTROPODA)
- aqabensis, Cerithiovermetus aqabensis K. Bandel, 2006 - (VERMETIDAE)
- aquadillensis, Licina aquadillensis L. Pfeiffer, 1875 - syn of: Licina aguadillensis (L. Pfeiffer, 1875) - (POMATIIDAE)
- aquaealbae, Chamaearionta aquaealbae (S.S. Berry, 1922) - (HELMINTHOGLYPTIDAE)
- aquaedulcensis, Cuna aquaedulcensis B.F. Kensley, 1977 † - (CONDYLOCARDIIDAE) (FOSSIL)
- aquaedulcioris, Neosolen aquaedulcioris (E. Ghosh, 1920) - (SOLENIDAE)
- aquaedulcioris, Neosolen aquaedulcioris Gosh, 1920 - syn of: Solen delesserti G.B. Sowerby, 1874 - (SOLENIDAE)
- aquaedulcioris, Solen aquaedulcioris E. Ghosh, 1920 - syn of: Neosolen aquaedulcioris (E. Ghosh, 1920) - (SOLENIDAE)
- aquaensis, Eburna aquaensis A.A. Olsson, 1922 † - (ANCILLARIIDAE) (FOSSIL)
- aqualatensis, Cernuella aqualatensis J.M. Salvañá, 1887 - syn of: Cernuella virgata (E.M. Da Costa, 1778) - (HYGROMIIDAE)
- aqualica, Merica aqualica (R.E. Petit & M.G. Harasewych, 1986) - (CANCELLARIIDAE)
- aquamarina, Solariella aquamarina J.C. Melvill, 1909 - (SOLARIELLIDAE)
- aquamarina, Colpospira aquamarina T.A. Garrard, 1972 - syn of: Colpospira cordismei (Watson, 1881) - (TURRITELLIDAE)
- aquanica, Drillia aquanica A.A. Olsson, 1922 † - (DRILLIIDAE) (FOSSIL)
- aquansis, Drillia aquansis A.A. Olsson, 1922 † - (DRILLIIDAE) (FOSSIL)
- aquaria, Serpula aquaria E.J. Burrow, 1815 - syn of: Verpa penis (C. Linnaeus, 1758) - (VERMETIDAE)
- aquarius, Musculus aquarius A.W. Grabau & S.G. King, 1928 - syn of: Arcuatula senhousia (W.H. Benson, 1842) - (MYTILIDAE)
- aquarius, Brechites aquarius E.J. Burrow, 1815 - syn of: Verpa penis (C. Linnaeus, 1758) - (PENICILLIDAE)
- aquatanica, Niveria aquatanica C.N. Cate, 1979 - syn of: Niveria nix (F.A. Schilder, 1922) - (TRIVIIDAE)
- aquatica, Fonscochlea aquatica W.F. Ponder, R. Hershler & B.W. Jenkins, 1989 - (HYDROBIIDAE)
- aquatica, Anodonta aquatica G. Servain, 1881 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- aquaticavis, Panomya aquaticavis R. Tiba, 1988 - (HIATELLIDAE)
- aquatilis, Chiton glaucus aquatilis L.A. Reeve, 1847 - (CHITONIDAE)
- aquatilis, Drillia aquatilis (L.A. Reeve, 1845) - (DRILLIIDAE)
- aquatilis, Haliotis aquatilis L.A. Reeve, 1846 - syn of: Haliotis diversicolor aquatilis L.A. Reeve, 1846 - (HALIOTIDAE)
- aquatilis, Haliotis diversicolor aquatilis L.A. Reeve, 1846 - (HALIOTIDAE)
- aquatilis, Malleus aquatilis L.A. Reeve, 1858 - syn of: Malleus regula (P. Forsskål in C. Niebuhr, 1775) - (MALLEIDAE)
- aquatilis, Vittina aquatilis (L.A. Reeve, 1855) - (NERITIDAE)
- aquatilis, Oliva aquatilis L.A. Reeve, 1850 - syn of: Olivancillaria vesica (J.F. Gmelin, 1791) - (OLIVIDAE)
- aquatilis, Doryssa aquatilis (L.A. Reeve, 1860) - (PACHYCHILIDAE)
- aquatilis, Monoplex aquatilis (L.A. Reeve, 1844) - (RANELLIDAE)
- aquatilis, Monoplex aquatilis L.A. Reeve, 1844 - syn of: Monoplex aquatilis (L.A. Reeve, 1844) - (RANELLIDAE)
- aquavitae, Helicarion aquavitae P.H. Scott, 1995 - (HELICARIONIDAE)
- Aquebana, Genus Aquebana H.A. Pilsbry, 1926 (SAGDIDAE)
- aquense, Dorsanum aquense J.P.S. Grateloup, 1847 † - syn of: Cyllene baccata (B. de Basterot, 1825 †) - (NASSARIIDAE) (FOSSIL)
- aquense gracilis, Dorsanum aquense gracilis M.A. Peyrot, 1927 † - syn of: Cyllene baccata (B. de Basterot, 1825 †) - (NASSARIIDAE) (FOSSIL)
- aquense pertinax, Dorsanum aquense pertinax M.A. Peyrot, 1927 † - syn of: Cyllene baccata (B. de Basterot, 1825 †) - (NASSARIIDAE) (FOSSIL)
- aquensis, Diacrolinia aquensis (J.P.S. Grateloup, 1827 †) - (CAVOLINIIDAE) (FOSSIL)
- aquensis, Cavolinia aquensis J.P.S. Grateloup, 1932 † - syn of: Diacrolinia aquensis (J.P.S. Grateloup, 1827 †) - (CAVOLINIIDAE) (FOSSIL)
- aquensis, Fusiturris aquensis (J.P.S. Grateloup, 1832 †) - (CLAVATULIDAE) (FOSSIL)
- aquensis, Conus aquensis Orbigny, 1852 † - (CONIDAE) (FOSSIL)
- aquensis, Fissurella aquensis A.V.M.D. D'Orbigny, 1852 † - syn of: Lucapinella clypeata (J.P.S. Grateloup, 1828 †) - (FISSURELLIDAE) (FOSSIL)
- aquensis, Nematurella aquensis (Degrange-Touzin, 1892 †) - (HYDROBIIDAE) (FOSSIL)
- aquensis, Melanopsis aquensis J.P.S. Grateloup, 1838 † - syn of: Melanopsis major A.E.J. Férussac, 1823 † - (MELANOPSIDAE) (FOSSIL)
- aquensis, Sinum aquensis C.A. Récluz, 1843 † - (NATICIDAE) (FOSSIL)
- aquensis, Neritina aquensis J.P.S. Grateloup, 1828 † - syn of: Theodoxus grateloupianus (A.E.J. Férussac, 1823 †) - (NERITIDAE) (FOSSIL)
- aquensis, Cypraeopsis aquensis Schilder 1936 † - (OVULIDAE) (FOSSIL)
- aquensis, Tricolia aquensis d'Orbigny, 1852 † - (PHASIANELLIDAE) (FOSSIL)
- aquensis, Raphitoma aquensis M.A. Peyrot, 1931 † - syn of: Bela elegantissima (M.A. Peyrot, 1931 †) - (RAPHITOMIDAE) (FOSSIL)
- aquensis, Pusillina aquensis P. Lozouet, 2015 - (RISSOIDAE)
- aquensis longotriangula, Sigaretus aquensis longotriangula F. Sacco, 1891 † - syn of: Sinum patulum (J.P.S. Grateloup, 1847 †) - (NATICIDAE) (FOSSIL)
- aquensis nigropunctata, Tricolia aquensis nigropunctata A.E.M. Cossmann & M.A. Peyrot, 1916 † - (PHASIANELLIDAE) (FOSSIL)
- aquensis perinflata, Sigaretus aquensis perinflata F. Sacco, 1890 † - syn of: Sinum perinflatum (F. Sacco, 1890 †) - (NATICIDAE) (FOSSIL)
- aquensis praecedens, Sigaretus aquensis praecedens F. Sacco, 1891 † - syn of: Sinum patulum (J.P.S. Grateloup, 1847 †) - (NATICIDAE) (FOSSIL)
- aquensis taurinensis, Sigaretus aquensis taurinensis F. Sacco, 1891 † - syn of: Sinum patulum (J.P.S. Grateloup, 1847 †) - (NATICIDAE) (FOSSIL)
- aquiana, Crassatella aquiana Clark, 1895 † - (CRASSATELLIDAE) (FOSSIL)
- aquiana, Lucina aquiana Clark, 1895 † - (LUCINIDAE) (FOSSIL)
- Aquidauania, syn of: Genus Idiopyrgus H.A. Pilsbry, 1911 (POMATIOPSIDAE)
- Aquidaunia, Genus Aquidaunia G.M. Davis, 1979 (POMATIOPSIDAE)
- aquila, Arca aquila A. Heilprin, 1887 † - (ARCIDAE) (FOSSIL)
- aquila, Medora dalmatina aquila (L. Pfeiffer, 1846) - (CLAUSILIIDAE)
- aquila, Exogyra aquila A. Brongniart, 1871 † - (GRYPHAEIDAE) (FOSSIL)
- aquila, Helicarion aquila J.C. Cox, 1868 - (HELICARIONIDAE)
- aquila, Perna aquila S. Clessin, 1890 - syn of: Isognomon isognomum (C. Linnaeus, 1758) - (MYTILIDAE)
- aquila, Ostrea aquila A. Brongniart, 1871 † - syn of: Exogyra aquila A. Brongniart, 1871 † - (OSTREIDAE) (FOSSIL)
- aquila, Philine aquila J. van der Linden & Janssen, 1996 † - (PHILINIDAE) (FOSSIL)
- aquila, Isognomon aquila S. Clessin, 1890 - syn of: Isognomon isognomum (C. Linnaeus, 1758) - (PTERIIDAE)
- aquila, Turritella aquila A. Adams & L.A. Reeve in L.A. Reeve, 1849 - syn of: Turritella conspersa A. Adams & L.A. Reeve, 1849 - (TURRITELLIDAE)
- aquila, Elliptio aquila (I. Lea, 1857) - (UNIONIDAE)
- aquilaensis, Baculites aquilaensis Reeside, 1927 † - (BACULITIDAE) (FOSSIL)
- aquilarum, Buccinum aquilarum R.B. Watson, 1882 - syn of: Gymnobela aquilarum (R.B. Watson, 1882) - (BUCCINIDAE)
- aquilarum, Gymnobela aquilarum (R.B. Watson, 1882) - (RAPHITOMIDAE)
- aquilarum engonia, Pleurotomella aquilarum engonia A.E. Verrill, 1884 - syn of: Gymnobela engonia A.E. Verrill, 1884 - (RAPHITOMIDAE)
- aquilea, Turritella aquilea A. Adams & L.A. Reeve in L.A. Reeve, 1849 - syn of: Turritella conspersa A. Adams & L.A. Reeve, 1849 - (TURRITELLIDAE)
- aquilina, Carbonicola aquilina (J. de C. Sowerby, 1836 †) - (ANTHRACOSIIDAE) (FOSSIL)
- aquilina, Corbicula aquilina P.M. Heude, 1887 - syn of: Corbicula fluminea (O.F. Müller, 1774) - (CYRENIDAE)
- aquilina, Nerinea aquilina Stanton, 1947 † - (NERINEIDAE) (FOSSIL)
- aquilinum, Cardium aquilinum H. Mittre, 1842 - syn of: Parvicardium exiguum (J.F. Gmelin, 1791) - (CARDIIDAE)
- aquillana, Exogyra aquillana L.W. Stephenson, 1953 † - (GRYPHAEIDAE) (FOSSIL)
- Aquillus, syn of: Genus Cabestana P.F. Röding, 1798 (RANELLIDAE)
- Aquilofusus, Genus Aquilofusus Kautsky, 1925 † (FASCIOLARIIDAE) (FOSSIL)
- aquilonalis, Antiplanes motojimai aquilonalis Y.I. Kantor & A.V. Sysoev, 1991 - (PSEUDOMELATOMIDAE)
- Aquilonaria, syn of: Genus Lacuna W.H. Turton, 1827 (LITTORINIDAE)
- aquilonaria, Turbonilla aquilonaria R.S. Absalão, F.N. Dos Santos & D. de Oliveira Tenório, 2003 - (PYRAMIDELLIDAE)
- aquilonaria, Perrottetia aquilonaria T. Siriboon & S. Panha, 2014 - (STREPTAXIDAE)
- aquilonaris, Hemistomia aquilonaris M. Haase & P. Bouchet, 1998 - (TATEIDAE)
- aquilonia, Fautrix aquilonia B.A. Marshall, 1995 - (CALLIOSTOMATIDAE)
- aquilonia, Torresitrachia aquilonia F. Köhler, 2011 - (CAMAENIDAE)
- aquilonia, Witchellia aquilonia Imlay, 1964 † - syn of: Euaptetoceras amplectens S.S. Buckman, 1889 † - (HAMMATOCERATIDAE) (FOSSIL)
- aquilonia, Oscilla aquilonia A. Pimenta, F.N. Santos & R.S. Absalão, 2008 - (PYRAMIDELLIDAE)
- aquilonis, Oscilla aquilonis A. Pimenta, F.N. Santos & R.S. Absalão, 2008 - syn of: Oscilla aquilonia A. Pimenta, F.N. Santos & R.S. Absalão, 2008 - (PYRAMIDELLIDAE)
- Aquilonites, Genus Aquilonites Kusina, 1974 † (INTOCERATIDAE) (FOSSIL)
- aquilonius, Carthaginites aquilonius J. Kennedy & Cobban, 1990 † - (TURRILITIDAE) (FOSSIL)
- aquilum, Cerithiopsis aquilum H.A. Rehder, 1980 - (CERITHIOPSIDAE)
- aquilus, Vermiculatus aquilus (L.A. Reeve, 1848) - (BULIMULIDAE)
- aquilus, Cyclophorus aquilus G.B. Sowerby, 1840 - (CYCLOPHORIDAE)
- Aquilus, syn of: Genus Cabestana P.F. Röding, 1798 (RANELLIDAE)
- aquilus, Unio aquilus I. Lea, 1857 - syn of: Elliptio pullata (I. Lea, 1856) - (UNIONIDAE)
- aquisgranense, Toxoceras aquisgranense F. Schlüter, 1872 † - syn of: Glyptoxoceras aquisgranense (F. Schlüter, 1872 †) - (ANCYLOCERATIDAE) (FOSSIL)
- aquisgranense, Conocardium aquisgranense Beushausen, 1895 † - (CONOCARDIIDAE) (FOSSIL)
- aquisgranense, Glyptoxoceras aquisgranense (F. Schlüter, 1872 †) - (DIPLOMOCERATIDAE) (FOSSIL)
- aquisgranensiformis, Scaphites aquisgranensiformis (M. Collignon, 1969 †) - (SCAPHITIDAE) (FOSSIL)
- aquisgranensis, Nucula aquisgranensis Beushausen, 1895 † - syn of: Nuculoidea corbuliformis (J.W. Hall & R.P. Whitfield, 1869 †) - (NUCULIDAE) (FOSSIL)
- aquitanense, Propilidium aquitanense É.A.A. Locard, 1886 - syn of: Lepetella laterocompressa (A.G. de Rayneval & G. Ponzi, 1854) - (LEPETIDAE)
- aquitanensis, Pollia aquitanensis (M.A. Peyrot, 1924 †) - (BUCCINIDAE) (FOSSIL)
- aquitanensis, Gibberula aquitanensis P. Lozouet, 1998 † - (CYSTISCIDAE) (FOSSIL)
- aquitanica, Arca aquitanica C. Mayer, 1861 - syn of: Arca turoniensis aquitanica (C. Mayer, 1861) - (ARCIDAE)
- aquitanica, Arca turoniensis aquitanica (C. Mayer, 1861) - (ARCIDAE)
- aquitanica, Neptunia aquitanica É.A.A. Locard, 1897 - syn of: Troschelia berniciensis (W. King, 1846) - (BUCCINIDAE)
- aquitanica, Neptunea aquitanica É.A.A. Locard, 1897 - syn of: Troschelia berniciensis (W. King, 1846) - (BUCCINIDAE)
- aquitanica, Chama aquitanica É.A. Benoist, 1889 † - (CHAMIDAE) (FOSSIL)
- aquitanica, Mitrella aquitanica (M.A. Peyrot, 1925 †) - (COLUMBELLIDAE) (FOSSIL)
- aquitanica, Hydrobia aquitanica Degrange-Touzin, 1892 † - (HYDROBIIDAE) (FOSSIL)
- aquitanica, Lima aquitanica J.B.P.A. Lamarck, 1819 † - (LIMIDAE) (FOSSIL)
- aquitanica, Melanopsis aquitanica P.M. Pallary, 1916 † - (MELANOPSIDAE) (FOSSIL)
- aquitanica, Mitra aquitanica É.A.A. Locard, 1890 - syn of: Mitra cornicula (C. Linnaeus, 1758) - (MITRIDAE)
- aquitanica, Natica aquitanica R. Tournouer, 1873 † - (NATICIDAE) (FOSSIL)
- aquitanica, Natica aquitanica J.R. Tournouër, 1873 † - syn of: Natica crassiuscula J.P.S. Grateloup, 1847 † - (NATICIDAE) (FOSSIL)
- aquitanica, Lopha aquitanica (C. Mayer, 1858 †) - (OSTREIDAE) (FOSSIL)
- aquitanica, Tinnyea aquitanica (Noulet, 1846 †) - (PACHYCHILIDAE) (FOSSIL)
- aquitanica, Ondina coarctata aquitanica F. Nordsieck, 1972 - (PYRAMIDELLIDAE)
- aquitanica, Rissoina aquitanica A.E.M. Cossmann & M.A. Peyrot, 1919 † - syn of: Zebina aquitanica (A.E.M. Cossmann & M.A. Peyrot, 1919 †) - (RISSOINIDAE) (FOSSIL)
- aquitanica, Solecurtus aquitanica C. Mayer, 1858 † - (SOLECURTIDAE) (FOSSIL)
- aquitanica, Stenothyroides aquitanica (A.E.M. Cossmann & M.A. Peyrot, 1918 †) - (STENOTHYRIDAE) (FOSSIL)
- aquitanica, Tellina aquitanica C. Mayer, 1864 † - (TELLINIDAE) (FOSSIL)
- aquitanica, Thiara aquitanica Noulet, 1846 † - syn of: Tinnyea aquitanica (Noulet, 1846 †) - (THIARIDAE) (FOSSIL)
- aquitanica, Eratopsis aquitanica Schilder, 1933 † - syn of: Erato subcypraeola A.V.M.D. D'Orbigny, 1852 † - (TRIVIIDAE) (FOSSIL)
- aquitanica, Gibbula aquitanica A.E.M. Cossmann & M.A. Peyrot, 1917 † - (TROCHIDAE) (FOSSIL)
- aquitanica, Turritella aquitanica R. Tournouer, 1874 † - (TURRITELLIDAE) (FOSSIL)
- aquitanica, Lyria subharpula aquitanica M.A. Peyrot, 1925 - (VOLUTIDAE)
- aquitanica, Zebina aquitanica (A.E.M. Cossmann & M.A. Peyrot, 1919 †) - (ZEBINIDAE) (FOSSIL)
- aquitanica burdigalica, Tellina aquitanica burdigalica A.E.M. Cossmann & M.A. Peyrot, 1910 † - (TELLINIDAE) (FOSSIL)
- aquitanica lunata, Natica aquitanica lunata C. Mayer, 1895 † - (NATICIDAE) (FOSSIL)
- aquitanica perproxima, Tinnyea aquitanica perproxima A.E.M. Cossmann & M.A. Peyrot, 1921 † - (PACHYCHILIDAE) (FOSSIL)
- aquitanica?, Spaniorinus aquitanica? A.E.M. Cossmann & M.A. Peyrot, 1911 † - (GALEOMMATIDAE) (FOSSIL)
- aquitanicum, Charonia aquitanicum A.E.M. Cossmann & M.A. Peyrot, 1923 † - (RANELLIDAE) (FOSSIL)
- aquitanicum, Vasum aquitanicum M.A. Peyrot, 1928 † - (TURBINELLIDAE) (FOSSIL)
- aquitanicum, Astralium aquitanicum É.A. Benoist, 1874 † - (TURBINIDAE) (FOSSIL)
- aquitanicus, Discors aquitanicus C. Mayer, 1858 † - (CARDIIDAE) (FOSSIL)
- aquitanicus, Conus aquitanicus C. Mayer, 1858 † - (CONIDAE) (FOSSIL)
- aquitanicus, Laeviphitus aquitanicus P. Lozouet, 2015 - (ELACHISINIDAE)
- aquitanicus, Buccinofusus aquitanicus M.A. Peyrot, 1925 † - (FASCIOLARIIDAE) (FOSSIL)
- aquitanicus, Chicoreus aquitanicus J.P.S. Grateloup, 1833 † - (MURICIDAE) (FOSSIL)
- aquitanicus, Mytilus aquitanicus C. Mayer, 1958 † - (MYTILIDAE) (FOSSIL)
- aquitanicus, Nassarius aquitanicus C. Mayer, 1858 † - (NASSARIIDAE) (FOSSIL)
- aquitanicus, Spondylus crassicosta aquitanicus A.E.M. Cossmann & M.A. Peyrot, 1921 † - (SPONDYLIDAE) (FOSSIL)
- aquitanicus, Tornus aquitanicus P. Lozouet, 1998 † - (TORNIDAE) (FOSSIL)
- aquitanicus, Colliculus aquitanicus A.E.M. Cossmann & M.A. Peyrot, 1917 † - syn of: Gibbula aquitanica A.E.M. Cossmann & M.A. Peyrot, 1917 † - (TROCHIDAE) (FOSSIL)
- aquitanicus, Viviparus aquitanicus (É.A. Benoist, 1873 †) - (VIVIPARIDAE) (FOSSIL)
- aquitaniensis, Tritonoharpa aquitaniensis Lesport, Cluzaud & A. Verhecken, 2015 † - (CANCELLARIIDAE) (FOSSIL)
- aquitaniensis, Dizoniopsis aquitaniensis (A.E.M. Cossmann & M.A. Peyrot, 1922 †) - (CERITHIOPSIDAE) (FOSSIL)
- aquitaniensis, Fasciolaria aquitaniensis M.A. Peyrot, 1925 † - (FASCIOLARIIDAE) (FOSSIL)
- aquitaniensis, Murex aquitaniensis J.P.S. Grateloup, 1848 † - (MURICIDAE) (FOSSIL)
- aquitaniensis, Berthella aquitaniensis Valdés & P. Lozouet, 2000 † - (PLEUROBRANCHIDAE) (FOSSIL)
- aquitaniensis, Turritella aquitaniensis R. Tournouer, 1874 † - (TURRITELLIDAE) (FOSSIL)
- aquitanus, Onustus aquitanus L.R.L. Simone & C.M. Cunha, 2012 - (XENOPHORIDAE)
- aquoreus, Conus aquoreus R.C. Hoerle, 1976 † - (CONIDAE) (FOSSIL)
- ara, Cerithiopsis ara W.H. Dall & P. Bartsch, 1911 - (CERITHIOPSIDAE)
- ara, Bythiospeum ara (D. Geyer, 1905) - (HYDROBIIDAE)
- ara, Biradiolites ara Pons, 1977 † - (RADIOLITIDAE) (FOSSIL)
- arabatzis, Planorbarius corneus arabatzis A. Reischütz, P.L. Reischütz & W. Fischer, 2008 - (PLANORBIDAE)
- arabaya, Lioconcha arabaya S.E.T. Van der Meij, R.G. Moolenbeek & H. Dekker, 2010 - (VENERIDAE)
- arabella, Pleurotomaria arabella Billings, 1865 † - syn of: Ceratopea arabella (Billings, 1865 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- arabella, Ceratopea arabella (Billings, 1865 †) - (RAPHISTOMATIDAE) (FOSSIL)
- arabellum, Strioterebrum arabellum (K.H.J. Thiele, 1925) - (TEREBRIDAE)
- Arabia, Subgenus Georgia (Arabia) E. Fischer-Piette (POMATIIDAE)
- arabica, Notoplax arabica P. Kaas & R.A. Van Belle, 1988 - (ACANTHOCHITONIDAE)
- arabica, Arabicolaria arabica M. Harzhauser & T.A. Neubauer, 2015 † - (ANADROMIDAE) (FOSSIL)
- arabica, Aporrhais arabica Abbass, 1977 † - (APORRHAIDAE) (FOSSIL)
- arabica, Bulla arabica M.A.E. Malaquias & D.G. Reid, 2008 - (BULLIDAE)
- arabica, Ceratomyopsis arabica Cox, 1935 † - (CERATOMYOPSIDAE) (FOSSIL)
- arabica, Granaria arabica (W.L.H. Dohrn, 1860) - (CHONDRINIDAE)
- arabica, Clionella sinuata arabica E.W. Vredenburg, 1925 - (CLAVATULIDAE)
- arabica, Cylinder textile arabica L. Bozzetti, 2011 - (CONIDAE)
- arabica, Mauritia arabica (C. Linnaeus, 1758) - (CYPRAEIDAE)
- Arabica, syn of: Genus Mauritia F.H. Troschel, 1863 (CYPRAEIDAE)
- arabica, Tesseracme arabica B. Sahlmann & V. Wiese, 2016 - (DENTALIIDAE)
- arabica, Epimenia arabica L. Salvini-Plawén & Benayahu, 1991 - (EPIMENIIDAE)
- arabica, Amaea arabica (P. Nyst, 1871) - (EPITONIIDAE)
- arabica, Scalaria arabica P. Nyst, 1872 - syn of: Amaea arabica (P. Nyst, 1871) - (EPITONIIDAE)
- arabica, Octomarginula arabica (A. Adams, 1852) - (FISSURELLIDAE)
- arabica, Glycymeris arabica (C.B. Adams, 1871) - (GLYCYMERIDIDAE)
- arabica, Arabiella arabica D. Kadolsky, M. Harzhauser & T.A. Neubauer, 2015 † - (HYDROBIIDAE) (FOSSIL)
- arabica, Limatula arabica J. Stuardo, 1968 - syn of: Limatula leptocarya (J.C. Melvill, 1898) - (LIMIDAE)
- arabica, Echinolittorina arabica (Assal, 1990) - (LITTORINIDAE)
- arabica, Uroteuthis arabica (C.G. Ehrenberg, 1831) - (LOLIGINIDAE)
- arabica, Photololigo arabica (C.G. Ehrenberg, 1831) - syn of: Uroteuthis arabica (C.G. Ehrenberg, 1831) - (LOLIGINIDAE)
- arabica, Divalinga arabica H. Dekker & J. Goud, 1994 - (LUCINIDAE)
- arabica, Lymnaea arabica E.A. Smith, 1894 - syn of: Radix natalensis (C.F.F. von Krauss, 1848) - (LYMNAEIDAE)
- arabica, Volvarina arabica F. Boyer, 2015 - (MARGINELLIDAE)
- arabica, Serrata arabica Abbass, 1967 † - (MARGINELLIDAE) (FOSSIL)
- arabica, Mitra arabica W.L.H. Dohrn, 1861 - syn of: Mitra fasciolaris G.P. Deshayes in E.S.J.L. de Laborde & M. Linant, 1834 - (MITRIDAE)
- arabica, Murchisonella arabica K. Bandel, 2005 - (MURCHISONELLIDAE)
- arabica, Coralliophila arabica J.C. Melvill, 1898 - syn of: Coralliophila violacea (L.C. Kiener, 1836) - (MURICIDAE)
- arabica, Nerita arabica L.A. Reeve, 1855 - syn of: Nerita longii C.A. Récluz, 1842 - (NERITIDAE)
- arabica, Liostrea arabica Stefanini, 1925 † - (OSTREIDAE) (FOSSIL)
- arabica, Phenacolepas arabica K.H.J. Thiele, 1909 - (PHENACOLEPADIDAE)
- arabica, Plesiothyreus arabica (J.M.J. Christiaens, 1988) - syn of: Phenacolepas pararabica J.M.J. Christiaens, 1988 - (PHENACOLEPADIDAE)
- arabica, Phyllidia arabica C.G. Ehrenberg, 1831 - syn of: Phyllidia varicosa J.B.P.A. Lamarck, 1801 - (PHYLLIDIIDAE)
- arabica, Cephalopyge arabica H.G. Stubbings, 1937 - syn of: Cephalopyge trematoides (C. Chun, 1889) - (PHYLLIROIDAE)
- arabica, Biomphalaria arabica (J.C. Melvill & J.H. Ponsonby, 1896) - (PLANORBIDAE)
- arabica, Pirenella arabica D.G. Reid, 2016 - (POTAMIDIDAE)
- arabica, Eulimella arabica A. Issel, 1869 - (PYRAMIDELLIDAE)
- arabica, Iacra arabica H. Dekker & R.G. Moolenbeek - (SEMELIDAE)
- arabica, Sepia arabica A.L. Massy, 1916 - (SEPIIDAE)
- arabica, Stenothyra arabica E. Neubert, 1998 - (STENOTHYRIDAE)
- arabica, Lyrodus arabica G.F. Roch, 1935 - syn of: Lyrodus pedicellatus (J.L.A. Quatrefages, 1849) - (TEREDINIDAE)
- arabica, Stomatella arabica A. Adams, 1854 - (TROCHIDAE)
- arabica, Trochozonites arabica E. Neubert & D. Van Damme, 2012 † - (UROCYCLIDAE) (FOSSIL)
- arabica, Sagdellina arabica (E. Neubert & D. Van Damme, 2012 †) - (VALLONIIDAE) (FOSSIL)
- arabica, Periglypta arabica J.H. Chemnitz, 1795 - syn of: Circenita varia (P. Forsskål in C. Niebuhr, 1775) - (VENERIDAE)
- arabica, Venus arabica J.H. Chemnitz, 1795 - syn of: Circenita varia (P. Forsskål in C. Niebuhr, 1775) - (VENERIDAE)
- arabica, Venus arabica L.W. Dillwyn, 1817 - syn of: Circenita varia (P. Forsskål in C. Niebuhr, 1775) - (VENERIDAE)
- arabica, Arabivitrina arabica (K.H.J. Thiele, 1910) - (VITRINIDAE)
- arabica, Alcithoe arabica (J.F. Gmelin, 1791) - (VOLUTIDAE)
- arabica asiatica, Mauritia arabica asiatica F.A. Schilder & M. Schilder, 1939 - (CYPRAEIDAE)
- arabica depressa, Alcithoe arabica depressa H.H. Suter, 1908 - (VOLUTIDAE)
- arabica empressae, Mauritia arabica empressae C. Kessler, 2006 - (CYPRAEIDAE)
- arabica gibba, Mauritia arabica gibba G.S. Coen, 1949 - (CYPRAEIDAE)
- arabica grayana, Mauritia arabica grayana F.A. Schilder, 1930 - syn of: Mauritia grayana F.A. Schilder, 1930 - (CYPRAEIDAE)
- arabica immanis, Mauritia arabica immanis F.A. Schilder & M. Schilder, 1939 - (CYPRAEIDAE)
- arabica immanis rudimaculosa, Mauritia arabica immanis rudimaculosa L. Bozzetti, 2008 - (CYPRAEIDAE)
- arabica massauensis, Mauritia arabica massauensis F.A. Schilder, 1922 - (CYPRAEIDAE)
- arabica merguina, Mauritia arabica merguina F.Jr. Lorenz & A. Hubert, 1993 - (CYPRAEIDAE)
- arabica merguina, Mauritia arabica merguina F.Jr. Lorenz & M. Huber, 1993 - syn of: Mauritia arabica merguina F.Jr. Lorenz & A. Hubert, 1993 - (CYPRAEIDAE)
- arabica swainsoni, Alcithoe arabica swainsoni J. Marwick, 1926 - (VOLUTIDAE)
- arabica swainsoni motutaraensis, Alcithoe arabica swainsoni motutaraensis A.W.B. Powell, 1928 - (VOLUTIDAE)
- Arabicolaria, Genus Arabicolaria Harzhauser & Neubauer, 2015 † (ANADROMIDAE) (FOSSIL)
- arabicula, Pseudozonaria arabicula (J.B.P.A. Lamarck, 1810) - (CYPRAEIDAE)
- arabicula, Cypraea arabicula J.B.P.A. Lamarck, 1810 - syn of: Pseudozonaria arabicula (J.B.P.A. Lamarck, 1810) - (CYPRAEIDAE)
- arabicula, Alcithoe arabicula J. Marwick, 1926 † - (VOLUTIDAE) (FOSSIL)
- arabicum, Caecum arabicum A. Issel, 1869 - (CAECIDAE)
- arabicum, Vexillum arabicum H. Turner, 2008 - (COSTELLARIIDAE)
- arabicum, Bouleiceras arabicum Arkell, 1952 † - (HILDOCERATIDAE) (FOSSIL)
- arabicum, Aulacenoceras arabicum Tinant, 1987 † - (PARACENOCERATIDAE) (FOSSIL)
- arabicum, Prochaetoderma arabicum D. Ivanov & A.H. Scheltema, 2002 - (PROCHAETODERMATIDAE)
- arabicum, Propeamussium arabicum H.H. Dijkstra & A.W. Janssen, 2013 - (PROPEAMUSSIIDAE)
- arabicum, Semiterebellum arabicum Abbass, 1972 † - (ROSTELLARIIDAE) (FOSSIL)
- arabicum, Eudolium arabicum E.W. Vredenburg, 1925 † - (TONNIDAE) (FOSSIL)
- arabicum, Gafrarium arabicum (J.B.P.A. Lamarck, 1818) - (VENERIDAE)
- arabicus, Cardium arabicus A. Issel, 1869 - syn of: Afrocardium richardi (Audoin, 1826) - (CARDIIDAE)
- arabicus, Conus arabicus J.B.P.A. Lamarck, 1810 - syn of: Elisaconus litteratus (C. Linnaeus, 1758) - (CONIDAE)
- arabicus, Fusinus arabicus (J.C. Melvill, 1898) - (FASCIOLARIIDAE)
- arabicus, Megaxinus arabicus E.A. Glover & D.W. Taylor, 1997 - (LUCINIDAE)
- arabicus, Brachidontes arabicus F.P. Jousseaume in É. Lamy, 1919 - syn of: Brachidontes pharaonis (P. Fischer, 1870) - (MYTILIDAE)
- arabicus, Ommastrephes arabicus C.G. Ehrenberg, 1831 - syn of: Uroteuthis arabica (C.G. Ehrenberg, 1831) - (OMMASTREPHIDAE)
- arabicus, Zhonglupuceras arabicus (Miller & Furnish, 1957 †) - (PSEUDOHALORITIDAE) (FOSSIL)
- Arabiella, Genus Arabiella Kadolsky, Harzhauser & Neubauer, 2015 † (HYDROBIIDAE) (FOSSIL)
- arabiensis, Haliotis arabiensis Owen, Regter & Van Laethem, 2016 - (HALIOTIDAE)
- arabiensis, Proconulus arabiensis (R.B. Newton, 1908 †) - (PROCONULIDAE) (FOSSIL)
- arabiensis, Trochus arabiensis R.B. Newton, 1908 † - syn of: Proconulus arabiensis (R.B. Newton, 1908 †) - (TROCHIDAE) (FOSSIL)
- arabii, Globularia arabii Abbass, 1967 † - (AMPULLINIDAE) (FOSSIL)
- Arabitrigonia, Genus Arabitrigonia Nakano, 1973 † (PTEROTRIGONIIDAE) (FOSSIL)
- Arabivitrina, Subgenus Phenacolimax (Arabivitrina) K.H.J. Thiele, 1931 (VITRINIDAE)
- Araboxychilus, Genus Araboxychilus F. Riedel, 1977 (ZONITIDAE)
- arabscripta, Vitrinorbis arabscripta E. Rolán & F. Rubio, 1996 - (TORNIDAE)
- aracanensis, Euthria aracanensis G.F. Angas, 1873 - (BUCCINIDAE)
- aracanensis, Nassa aracanensis E.A. Smith, 1899 † - syn of: Tritia sinusigera (A. Adams, 1852) - (NASSARIIDAE) (FOSSIL)
- aracanensis, Nassarius aracanensis E.A. Smith, 1899 † - syn of: Tritia sinusigera (A. Adams, 1852) - (NASSARIIDAE) (FOSSIL)
- aracasnsis, Planorbis aracasnsis J. Gundlach, 1857 - syn of: Drepanotrema anatinum (A.V.M.D. D'Orbigny, 1835) - (PLANORBIDAE)
- araceliae, Turbonilla araceliae A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- arachis, Bulla arachis J.R.C. Quoy & J.P. Gaimard, 1833 - syn of: Adamnestia arachis (J.R.C. Quoy & J.P. Gaimard, 1833) - (BULLIDAE)
- arachis, Adamnestia arachis (J.R.C. Quoy & J.P. Gaimard, 1833) - (CYLICHNIDAE)
- arachis, Cylichna arachis J.R.C. Quoy & J.P. Gaimard, 1833 - syn of: Adamnestia arachis (J.R.C. Quoy & J.P. Gaimard, 1833) - (CYLICHNIDAE)
- arachleica, Lymnaea arachleica N.D. Kruglov & Y.I. Starobogatov, 1989 - (LYMNAEIDAE)
- arachleica, Physa arachleica Y.I. Starobogatov & L.A. Prozorova, 1989 - (PHYSIDAE)
- arachleicus, Acroloxus arachleicus N.D. Kruglov & Y.I. Starobogatov, 1991 - (ACROLOXIDAE)
- arachne, Mesaktoceras arachne B. Wade, 1977 † - (GEORGINIDAE) (FOSSIL)
- arachne, Stylonema arachne J. Perner, 1907 † - (LOXONEMATIDAE) (FOSSIL)
- arachne, Trochonemella arachne (Billings, 1865 †) - (TROCHONEMATIDAE) (FOSSIL)
- arachnoidea, Scurriopsis arachnoidea (Morris & Lycett) † - (ACMAEIDAE) (FOSSIL)
- arachnoidea, Natica arachnoidea (J.F. Gmelin, 1791) - (NATICIDAE)
- arachnoidea, Natica arachnoidea J.B.P.A. Lamarck, 1822 - syn of: Natica fulminea (J.F. Gmelin, 1791) - (NATICIDAE)
- arachnoidea, Nerita arachnoidea J.F. Gmelin, 1791 - syn of: Natica arachnoidea (J.F. Gmelin, 1791) - (NERITIDAE)
- arachnoidea, Oliva arachnoidea P.F. Röding, 1798 - syn of: Oliva spicata (P.F. Röding, 1798) - (OLIVIDAE)
- arachnoidea, Goniobasis arachnoidea J.G. Anthony, 1854 - syn of: Goniobasis arachnoides (J.G. Anthony, 1854) - (PLEUROCERIDAE)
- arachnoides, Cultrigera arachnoides (J. Müller, 1851 †) - (APORRHAIDAE) (FOSSIL)
- arachnoides, Ricinula arachnoides J.B.P.A. Lamarck, 1816 - syn of: Drupa ricinus arachnoides J.B.P.A. Lamarck, 1816 - (MURICIDAE)
- arachnoides, Drupa ricinus arachnoides J.B.P.A. Lamarck, 1816 - (MURICIDAE)
- arachnoides, Goniobasis arachnoides (J.G. Anthony, 1854) - (PLEUROCERIDAE)
- arachnoides, Spondylus arachnoides J.B.P.A. Lamarck, 1819 - syn of: Spondylus americanus Hermann, 1781 - (SPONDYLIDAE)
- arachnoides, Lambis arachnoides T. Shikama, 1971 - (STROMBIDAE)
- arachnoides spinella, Goniobasis arachnoides spinella I. Lea, 1862 - (PLEUROCERIDAE)
- arachnoideus, Calyptropsis arachnoideus R. Tate, 1893 † - (CALYPTRAEIDAE) (FOSSIL)
- arachnoideus, Conus arachnoideus J.F. Gmelin, 1791 - syn of: Conus araneosus J. Lightfoot, 1786 - (CONIDAE)
- aracruzensis, Turbonilla aracruzensis A. Pimenta & R.S. Absalão, 2004 - (PYRAMIDELLIDAE)
- aradae, Erycina aradae S. Biondi-Giunti, 1859 - syn of: Abra prismatica (G. Montagu, 1808) - (LASAEIDAE)
- aradasi, Cernuella aradasi E. Pirajno, 1842 - syn of: Cernuella virgata (E.M. Da Costa, 1778) - (HYGROMIIDAE)
- Aradasia, syn of: Genus Euchelus R.A. Philippi, 1847 (CHILODONTIDAE)
- Aradasia, syn of: Genus Coralliophila H. Adams & A. Adams, 1853 (MURICIDAE)
- aradasiana, Hohenwartiana aradasiana L. Benoit, 1862 - syn of: Hohenwartiana hohenwarti (E.A. Rossmässler, 1839) - (FERUSSACIIDAE)
- aradasii, Cernuella aradasii (E. Pirajno, 1842) - (HYGROMIIDAE)
- aradasii, Limopsis aradasii (D.M. Testa, 1842 †) - (LIMOPSIDAE) (FOSSIL)
- aradasii, Murexsul aradasii (T.A. de M. Monterosato in N.J. Poirier, 1883) - (MURICIDAE)
- aradasii, Atrina aradasii C. Maravigna, 1851 - syn of: Atrina fragilis (T. Pennant, 1777) - (PINNIDAE)
- aradasii, Venus casina aradasii M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1889 - (VENERIDAE)
- Aradomurex, syn of: Genus Coralliophila H. Adams & A. Adams, 1853 (MURICIDAE)
- aradusana, Mitrella aradusana P.M. Pallary, 1938 - syn of: Mitrella coccinea (R.A. Philippi, 1836) - (COLUMBELLIDAE)
- arae, Syrnola arae A. Peñas & E. Rolán, 2002 - (PYRAMIDELLIDAE)
- araea, Gonimyrtea araea (R. Tate, 1887 †) - (LUCINIDAE) (FOSSIL)
- Araeodactylus, Genus Araeodactylus G.F. Harris & H.W. Burrows, 1891 † (APORRHAIDAE) (FOSSIL)
- Araeonema, Genus Araeonema Knight , 1933 † (ARAEONEMATIDAE) (FOSSIL)
- ARAEONEMATIDAE Nützel & Nakazawa, 2012 † - Family (GASTROPODA-VETIGASTROPODA) (FOSSIL)
- Araeopleura, Genus Araeopleura Cox, 1965 † (MONOPLEURIDAE) (FOSSIL)
- araeosomae, Hypermastus araeosomae T. Habe, 1992 - (EULIMIDAE)
- araeostyla, Zeadmete araeostyla (P.A. Maxwell, 1988 †) - (CANCELLARIIDAE) (FOSSIL)
- arafra, Triphora arafra C.F. Laseron, 1958 - (TRIPHORIDAE)
- arafura, Coriophora arafura (C.F. Laseron, 1958) - (TRIPHORIDAE)
- arafura, Triphora arafura (C.F. Laseron, 1958) - syn of: Coriophora arafura (C.F. Laseron, 1958) - (TRIPHORIDAE)
- arafurensis, Mirandaphera arafurensis (A. Verhecken, 1997) - (CANCELLARIIDAE)
- arafurensis, Solatia arafurensis A. Verhecken, 1997 - syn of: Mirandaphera arafurensis (A. Verhecken, 1997) - (CANCELLARIIDAE)
- arafurensis, Pionoconus arafurensis E. Monnier, L. Limpalaër & A. Robin, 2013 - (CONIDAE)
- arafurensis, Hemidonax arafurensis W.F. Ponder, P.H. Colman, C.M. Yonge & P.H. Colman, 1981 - (HEMIDONACIDAE)
- arafurensis, Limatula arafurensis J. Stuardo, 1968 - syn of: Limatula tadena (T. Iredale, 1939) - (LIMIDAE)
- arafurensis, Daphnella arafurensis (E.A. Smith, 1884) - (RAPHITOMIDAE)
- arago, Pseudofulvia arago E. Vidal & L. Kirkendale, 2007 - (CARDIIDAE)
- aragoni, Turbonilla aragoni W.H. Dall & P. Bartsch, 1909 - (PYRAMIDELLIDAE)
- aragonia, Venericor aragonia (R. Arnold & H.B. Hannibal, 1914 †) - (CARDITIDAE) (FOSSIL)
- aragonia, Tellina aragonia W.H. Dall, 1909 † - (TELLINIDAE) (FOSSIL)
- aragonia smileyi, Venericor aragonia smileyi (E.H. Vokes, 1939 †) - (CARDITIDAE) (FOSSIL)
- aragonica, Chondrina aragonica P. Fagot, 1889 - syn of: Chondrina ascendens C.A. Westerlund, 1878 - (CHONDRINIDAE)
- araguayana, Aylacostoma araguayana (H.F.A. von Ihering, 1902) - (THIARIDAE)
- arahura, Pelicaria arahura A.G. Beu, 2010 - (STRUTHIOLARIIDAE)
- arai, Nuculana arai T. Habe, 1958 - (NUCULANIDAE)
- araia, Radobornia araia W.H. Dall, P. Bartsch & H.A. Rehder, 1938 - syn of: Radobornia bryani (H.A. Pilsbry, 1921) - (KELLIIDAE)
- Araiofusus, Genus Araiofusus Callomon & Snyder, 2017 (FASCIOLARIIDAE)
- araiogramma, Loripes araiogramma P.G. Oliver & H.C.G. Chesney, 1997 - (LUCINIDAE)
- araios, Araiofusus araios Callomon & Snyder, 2017 - (FASCIOLARIIDAE)
- araios, Pagodula araios (R. Houart & W. Engl, 2007) - (MURICIDAE)
- araitonum, Buccinum araitonum R. Tiba, 1981 - (BUCCINIDAE)
- arakana, Oospira arakana (F. Stoliczka, 1872) - (CLAUSILIIDAE)
- arakana, Timoclea arakana (G. Nevill & H. Nevill, 1871) - (VENERIDAE)
- arakana lavrani, Timoclea arakana lavrani E. Fischer-Piette, 1974 - (VENERIDAE)
- arakanensis, Ancilla indica arakanensis E.W. Vredenburg, 1925 † - (ANCILLARIIDAE) (FOSSIL)
- arakanensis, Cantharus martiniana arakanensis E.W. Vredenburg, 1923 - (BUCCINIDAE)
- arakanensis, Clavilithes arakanensis E.W. Vredenburg, 1923 † - (FASCIOLARIIDAE) (FOSSIL)
- arakanensis, Pleuropoma arakanensis (W.T. Blanford) - (HELICINIDAE)
- arakanensis, Ostrea arakanensis G.B. II Sowerby, 1871 - syn of: Saccostrea echinata (J.R.C. Quoy & J.P. Gaimard, 1835) - (OSTREIDAE)
- arakanensis, Psammobia arakanensis E.A. Smith, 1904 - syn of: Gari truncata (C. Linnaeus, 1767) - (PSAMMOBIIDAE)
- arakawai, Octopus arakawai Iw. Taki, 1964 - syn of: Callistoctopus ornatus (A.A. Gould, 1852) - (OCTOPODIDAE)
- arakawai, Chlamys arakawai S. Nomura, 1935 † - (PECTINIDAE) (FOSSIL)
- aralarensis, Pyrenaearia velascoi aralarensis C.E. Prieto, 1986 - (HYGROMIIDAE)
- aralensis, Dreissena aralensis N.I. Andrusov, 1897 - syn of: Dreissena polymorpha (P.S. Pallas, 1771) - (DREISSENIDAE)
- aralensis, Caspiohydrobia aralensis Y.I. Starobogatov & S.I. Andreeva, 1981 - (HYDROBIIDAE)
- aralensis, Rostellaria aralensis K.E.I. von Eichwald, 1868 † - (ROSTELLARIIDAE) (FOSSIL)
- aralia, Cerithiopsis aralia A.A. Olsson & A. Harbison, 1953 - (CERITHIOPSIDAE)
- aralica, Acirsa aralica O.V. Amitrov, 2012 - (EPITONIIDAE)
- aralica, Tomyris aralica Michailovski, 1912 † - (TURRITELLIDAE) (FOSSIL)
- Aralocardia, Genus Aralocardia Vialov, 1937 † (CARDIIDA (unassigned)) (FOSSIL)
- arambourgi, Knemiceras arambourgi Basse, 1940 † - (KNEMICERATIDAE) (FOSSIL)
- arambourgi, Subuliniscus arambourgi J. Germain - (SUBULINIDAE)
- arambourgi, Hemithersitea arambourgi Salvan, 1954 † - (THERSITEIDAE) (FOSSIL)
- arancensis, Graefenbergites arancensis (Melendez Hevia, 1989 †) - (PERISPHINCTIDAE) (FOSSIL)
- aranciicoloris, Mitrella aranciicoloris D. Monsecour & D. Monsecour, 2011 - (COLUMBELLIDAE)
- aranea, Gittenbergia aranea L. Pfeiffer, 1870 - syn of: Gittenbergia sororcula (L. Benoit, 1859) - (CHONDRINIDAE)
- aranea, Fissurella aranea DeVries, 2008 † - (FISSURELLIDAE) (FOSSIL)
- aranea, Harpagodes aranea (A.V.M.D. D'Orbigny, 1850 †) - (HARPAGODIDAE) (FOSSIL)
- aranea, Cytora aranea (A.W.B. Powell, 1928) - (LIAREIDAE)
- aranea, Murex aranea H.M.D. de Blainville in L.C. Kiener, 1842 - syn of: Chicoreus cornucervi (P.F. Röding, 1798) - (MURICIDAE)
- Aranea, syn of: Genus Murex C. Linnaeus, 1758 (MURICIDAE)
- aranea, Octopus aranea D'Orbigny, 1834 - (OCTOPODIDAE)
- aranea, Posidonia aranea (Tozer, 1961 †) - (POSIDONIIDAE) (FOSSIL)
- aranea, Claraia aranea Tozer, 1961 † - syn of: Posidonia aranea (Tozer, 1961 †) - (PTERINOPECTINIDAE) (FOSSIL)
- araneaetela, Aegista araneaetela (P.M. Heude, 1885) - (BRADYBAENIDAE)
- araneifer, Euomphalus araneifer Whidborne, 1892 † - (EUOMPHALIDAE) (FOSSIL)
- Araneites, Genus Araneites Bogoslovskii, 1971 † (SPORADOCERATIDAE) (FOSSIL)
- araneoides, Octopus araneoides Iw. Taki, 1964 - (OCTOPODIDAE)
- araneosa, Columbella araneosa L.C. Kiener, 1841 - syn of: Euplica scripta (J.B.P.A. Lamarck, 1822) - (COLUMBELLIDAE)
- araneosa, Columbella araneosa A.A. Gould, 1860 - syn of: Mitrella bicincta (A.A. Gould, 1860) - (COLUMBELLIDAE)
- araneosa, Euplica araneosa L.C. Kiener, 1840 - syn of: Euplica scripta (J.B.P.A. Lamarck, 1822) - (COLUMBELLIDAE)
- araneosa, Paradoris araneosa Á. Valdés, 2001 - (DISCODORIDIDAE)
- araneosa, Epicodakia araneosa (R. Tate, 1887 †) - (LUCINIDAE) (FOSSIL)
- araneosa, Oliva spicata araneosa J.B.P.A. Lamarck, 1811 - (OLIVIDAE)
- araneosa, Philine araneosa J. van der Linden, 1995 - (PHILINIDAE)
- araneosa, Xanthodaphne araneosa (R.B. Watson, 1881) - (RAPHITOMIDAE)
- araneosa, Pleurotomella araneosa R.B. Watson, 1881 - syn of: Xanthodaphne araneosa (R.B. Watson, 1881) - (RAPHITOMIDAE)
- araneosa, Pleurotoma araneosa R.B. Watson, 1881 - syn of: Xanthodaphne araneosa (R.B. Watson, 1881) - (TURRIDAE)
- araneosa, Zairia araneosa A. de Rochebrune, 1886 - syn of: Coelatura gabonensis (H.C. Küster, 1862) - (UNIONIDAE)
- araneosum, Orthoceras araneosum Barrande, 1866 † - (ORTHOCERATIDAE) (FOSSIL)
- araneosus, Limipecten araneosus Chronic, 1949 † - (AVICULOPECTINIDAE) (FOSSIL)
- araneosus, Conus araneosus J. Lightfoot, 1786 - (CONIDAE)
- araneosus, Conus araneosus C.H. Hwass, 1792 - syn of: Conus araneosus J. Lightfoot, 1786 - (CONIDAE)
- araneosus, Tapes araneosus (R.A. Philippi, 1847) - (VENERIDAE)
- araneosus, Venus araneosus R.A. Philippi, 1847 - syn of: Tapes araneosus (R.A. Philippi, 1847) - (VENERIDAE)
- araneosus nicobaricus, Conus araneosus nicobaricus C.H. Hwass in J.G. Bruguière, 1792 - (CONIDAE)
- araneum, Parvamussium araneum H.H. Dijkstra, 1991 - (PROPEAMUSSIIDAE)
- araneus, Maxigoniatites araneus (Nicolaus, 1963 †) - (MAXIGONIATITIDAE) (FOSSIL)
- Arangia, Genus Arangia H.A. Pilsbry & E.G. Vanatta, 1898 (UROCOPTIDAE)
- arangia, Athleta arangia K.V.W. Palmer, 1953 † - (VOLUTIDAE) (FOSSIL)
- arangiana, Caracolus marginella arangiana (F. Poey, 1854) - (PLEURODONTIDAE)
- arangiana, Troschelvindex arangiana (J. Gundlach in L. Pfeiffer, 1857) - (POMATIIDAE)
- arangiana, Gongylostoma arangiana (J. Gundlach in R. Arango, 1878) - (UROCOPTIDAE)
- arangiana cautoensis, Troschelvindex arangiana cautoensis (C. de la Torre & P. Bartsch, 1941) - (POMATIIDAE)
- arangiana magistra, Troschelvindex arangiana magistra (C. de la Torre & P. Bartsch, 1941) - (POMATIIDAE)
- arangiana turquinensis, Troschelvindex arangiana turquinensis M.I. Sánchez Roig, 1951 - (POMATIIDAE)
- Arangocoptis, Subgenus Gongylostomella (Arangocoptis) M.L. Jaume & C. de la Torre, 1972 (UROCOPTIDAE)
- arangoi, Jeanneretia parraiana arangoi W.J. Clench & C.G. Aguayo, 1951 - (CEPOLIDAE)
- arangoi, Cerion arangoi (H.A. Pilsbry & E.G. Vanatta, 1896) - (CERIONIDAE)
- arangoi, Purpuriconus arangoi (H. Sarasúa, 1977) - (CONIDAE)
- arangoi, Hipponix arangoi (R. Arango, 1880) - (HIPPONICIDAE)
- arangoi, Leptaxis arangoi G.W. Tryon, 1888 - syn of: Leptaxis advena (P.B. Webb & S. Berthelot, 1833) - (HYGROMIIDAE)
- arangoi, Prunum arangoi J. Espinosa & J.A. Ortea, 2015 - (MARGINELLIDAE)
- arangoi, Farcimen arangoi C. de la Torre & P. Bartsch, 1942 - (MEGALOMASTOMIDAE)
- arangoi, Liguus fasciatus arangoi M.L. Jaume, 1952 - (ORTHALICIDAE)
- arangoi, Diplopoma arangoi (M.L. Jaume, 1984) - (POMATIIDAE)
- arangoi, Chondropoma pictum arangoi C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- arangoi, Chondropometes segregatum arangoi C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- arangoi, Succinea arangoi L. Pfeiffer, 1866 - (SUCCINEIDAE)
- arangoi, Macroceramus clerchi arangoi L. Pfeiffer, 1866 - (UROCOPTIDAE)
- arangoi alcaldei, Cerion arangoi alcaldei C.G. Aguayo & M.I. Sánchez Roig, 1953 - syn of: Cerion alcaldei C.G. Aguayo & M.I. Sánchez Roig, 1953 - (CERIONIDAE)
- ARANUCIDAE Odhner, 1936 - Family (GASTROPODA-HETEROBRANCHIA-OPISTHOBRANCHIA-NUDIPLEURA)
- Aranucus, Genus Aranucus N.H. Odhner, 1936 † (ARANUCIDAE) (FOSSIL)
- araonis, Clanculopsis araonis (B. de Basterot, 1825 †) - (TROCHIDAE) (FOSSIL)
- araozi, Bulimulus araozi W.K. Weyrauch, 1956 - syn of: Sphaeroconcha araozi (W.K. Weyrauch, 1956) - (BULIMULIDAE)
- araozi, Sphaeroconcha araozi (W.K. Weyrauch, 1956) - (ORTHALICIDAE)
- arapaoa, Eophysema arapaoa (C.A. Fleming, 1950 †) - (LUCINIDAE) (FOSSIL)
- arapotiensis, Megalobulimus arapotiensis F. Lange de Morretes, 1952 - (MEGALOBULIMIDAE)
- Araratella, syn of: Genus Mennessieria Calzada, 1987 † (CASSIOPIDAE) (FOSSIL)
- araratensis, Lymnaea araratensis N.D. Kruglov & Y.I. Starobogatov, 1985 - (LYMNAEIDAE)
- arare, Cenoceras arare (Dumortier, 1869 †) - (CENOCERATIDAE) (FOSSIL)
- araribola, Yoldiella araribola N.P. Benaim & R.S. Absalão, 2011 - (YOLDIIDAE)
- arariformis, Cenoceras arariformis (Pia, 1914 †) - (CENOCERATIDAE) (FOSSIL)
- arariformis, Nautilus arariformis Pia, 1914 † - syn of: Cenoceras arariformis (Pia, 1914 †) - (NAUTILIDAE) (FOSSIL)
- araripensis, Brachidontes araripensis Pereira & al., 2015 † - (MYTILIDAE) (FOSSIL)
- araris, Nautilus araris Dumortier, 1869 † - syn of: Cenoceras arare (Dumortier, 1869 †) - (NAUTILIDAE) (FOSSIL)
- araris, Unio araris J.P. Barbier - syn of: Pseudunio auricularius (L. Spengler, 1793) - (UNIONIDAE)
- araroaensis, Talochlamys araroaensis (A.G. Beu, 1970 †) - (PECTINIDAE) (FOSSIL)
- Arasella, Genus Arasella Ghaderi & al., 2014 † (XENODISCIDAE) (FOSSIL)
- Arastra, Genus Arastra Stoyanow, 1948 † (EOTOMARIIDAE) (FOSSIL)
- arata, Anadara arata (T. Say, 1824 †) - (ARCIDAE) (FOSSIL)
- arata, Neptunea arata A.E. Verrill, 1880 - syn of: Colus stimpsoni (O.A.L. Mörch, 1868) - (BUCCINIDAE)
- arata, Camaena arata G.B. Sowerby, 1892 - (CAMAENIDAE)
- arata, Carditamera arata (T.A. Conrad, 1838) - (CARDITIDAE)
- arata, Cardita arata (T.A. Conrad, 1838) - syn of: Carditamera arata (T.A. Conrad, 1838) - (CARDITIDAE)
- arata, Lienardia arata P. Bartsch, 1915 - syn of: Lienardia grayi (L.A. Reeve, 1845) - (CLATHURELLIDAE)
- arata, Truncacteocina arata (R.B. Watson, 1883) - (CYLICHNIDAE)
- arata, Corbicula arata G.B. Sowerby, 1878 - (CYRENIDAE)
- arata, Drillia arata T.A. Conrad, 1862 † - (DRILLIIDAE) (FOSSIL)
- arata, Tucetona arata (T.A. Conrad, 1841 †) - (GLYCYMERIDIDAE) (FOSSIL)
- arata, Euryzone arata (J.W. Hall, 1862 †) - (GOSSELETINIDAE) (FOSSIL)
- arata, Ogasawarana yoshiwarana arata (H.A. Pilsbry, 1902) - (HELICINIDAE)
- arata, Jolya arata (R.W. Dunker, 1857) - (MYTILIDAE)
- arata, Ilyanassa arata (T. Say, 1824 †) - (NASSARIIDAE) (FOSSIL)
- arata, Natica arata R. Tate, 1893 † - syn of: Globisinum pritchardi (A.E.M. Cossmann, 1907 †) - (NATICIDAE) (FOSSIL)
- arata, Neridomus arata (Tate) † - (NERIDOMIDAE) (FOSSIL)
- arata, Polidevcia arata (J.W. Hall, 1852 †) - (NUCULANIDAE) (FOSSIL)
- arata, Ostrea arata J.F. Gmelin, 1791 - syn of: Karnekampia sulcata (O.F. Müller, 1776) - (OSTREIDAE)
- arata, Panacca arata (A.E. Verrill & S. Smith in A.E. Verrill, 1881) - (PARILIMYIDAE)
- arata, Wedekindella arata (Whidborne, 1890 †) - (PARODOCERATIDAE) (FOSSIL)
- arata, Chlamys arata J.F. Gmelin, 1791 - syn of: Karnekampia sulcata (O.F. Müller, 1776) - (PECTINIDAE)
- arata, Pholadomya arata A.E. Verrill & S. Smith in A.E. Verrill, 1881 - syn of: Panacca arata (A.E. Verrill & S. Smith in A.E. Verrill, 1881) - (PHOLADOMYIDAE)
- arata, Pholadomya arata É.A.A. Locard, 1898 - syn of: Panacca locardi (W.H. Dall, 1903) - (PHOLADOMYIDAE)
- arata, Pinna arata E. Forbes, 1846 † - (PINNIDAE) (FOSSIL)
- arata, Dunkeria arata W.H. Dall & P. Bartsch, 1909 - (PYRAMIDELLIDAE)
- arata, Manzonia arata S. Gofas, 2007 - (RISSOIDAE)
- arata, Minolops arata (C. Hedley, 1903) - (SOLARIELLIDAE)
- arata, Tindaria arata L.M.D. Bellardi, 1875 - (TINDARIIDAE)
- arata, Micronaias arata (I. Lea, 1845) - (UNIONIDAE)
- arata, Callistalox arata (W.M. Gabb, 1864 †) - (VENERIDAE) (FOSSIL)
- arata, Meretrix arata W.M. Gabb, 1864 † - syn of: Callistalox arata (W.M. Gabb, 1864 †) - (VENERIDAE) (FOSSIL)
- arata floridana, Tucetona arata floridana A.A. Olsson & A. Harbison, 1953 - (GLYCYMERIDIDAE)
- aratibacillum, Chemnitzia aratibacillum (H.A. Pilsbry & Johnson, 1917 †) - (PYRAMIDELLIDAE) (FOSSIL)
- aratispira, Leptoconus aratispira H.A. Pilsbry, 1905 - syn of: Leptoconus kawamurai T. Habe, 1962 - (CONIDAE)
- aratispira, Bocageia aratispira H.A. Pilsbry, 1905 - (SUBULINIDAE)
- aratiuncula, Latiromitra aratiuncula (J.F. Quinn, 1981) - (COSTELLARIIDAE)
- aratorum, Megalophaedusa aratorum H.A. Pilsbry, 1903 - (CLAUSILIIDAE)
- aratorum, Dentalium aratorum A.H. Cooke, 1885 - syn of: Dentalium reevei P. Fischer, 1871 - (DENTALIIDAE)
- aratrum, Euprotomus aratrum (P.F. Röding, 1798) - (STROMBIDAE)
- aratrum chrysostomus, Euprotomus aratrum chrysostomus (J.T. Kuroda, 1942) - syn of: Euprotomus chrysostomus (J.T. Kuroda, 1942) - (STROMBIDAE)
- aratrum melanostomus, Euprotomus aratrum melanostomus (G.B. I Sowerby, 1825) - (STROMBIDAE)
- aratula, Pleurotomaria aratula J.L.M. Defrance 1826 † - (PLEUROTOMARIIDAE) (FOSSIL)
- aratula, Agniesella aratula (J. Perner, 1907 †) - (PORTLOCKIELLIDAE) (FOSSIL)
- aratum, Dentalium aratum R. Tate, 1887 † - (DENTALIIDAE) (FOSSIL)
- aratum, Pseudogrammoceras aratum Buckman, 1890 † - (HILDOCERATIDAE) (FOSSIL)
- aratum, Podagrosites aratum (Buckman, 1892 †) - (HILDOCERATIDAE) (FOSSIL)
- aratus, Ammonites aratus F.A. von Quenstedt, 1846 † - syn of: Cladiscites tornatus (J. Von Hauer, 1846 †) - (AMMONITIDA (unassigned)) (FOSSIL)
- aratus, Phoenicobius aratus (G.B. I Sowerby, 1841) - (BRADYBAENIDAE)
- aratus, Cenoceras aratus (F.A. von Quenstedt, 1846 †) - (CENOCERATIDAE) (FOSSIL)
- aratus, Conus aratus Gabb, 1873 † - (CONIDAE) (FOSSIL)
- aratus, Conus aratus R.N. Kilburn, 1973 - syn of: Fusiconus elokismenos (R.N. Kilburn, 1975) - (CONIDAE)
- aratus, Cadulus aratus C. Hedley, 1899 - (GADILIDAE)
- aratus, Goniatites aratus Whidborne, 1890 † - syn of: Wedekindella arata (Whidborne, 1890 †) - (GONIATITIDAE) (FOSSIL)
- aratus, Triplex aratus (L.M.D. Bellardi, 1872 †) - (MURICIDAE) (FOSSIL)
- aratus, Pecten aratus L. Waagen, 1867 † - syn of: Camptonectes auritus (Schlotheim, 1813 †) - (PECTINIDAE) (FOSSIL)
- aratus, Utriculus aratus R.B. Watson, 1883 - syn of: Truncacteocina arata (R.B. Watson, 1883) - (RETUSIDAE)
- aratus, Spondylus aratus Cooke, 1919 † - (SPONDYLIDAE) (FOSSIL)
- aratus, Ozodochilus aratus Lycett † - (TROCHIDAE) (FOSSIL)
- aratus, Unio aratus E.C. Von Martens, 1900 - syn of: Micronaias granadensis (I. Lea, 1868) - (UNIONIDAE)
- aratus, Saxidomus aratus A.A. Gould, 1861 - syn of: Saxidomus nuttalli T.A. Conrad, 1837 - (VENERIDAE)
- aratus amatanganus, Phoenicobius aratus amatanganus (M. Smith, 1932) - (BRADYBAENIDAE)
- aratus lutea, Phoenicobius aratus lutea (G.B. I Sowerby, 1840) - (BRADYBAENIDAE)
- arauana, Taitaa arauana C.M. Cooke & Y. Kondo, 1960 - (ACHATINELLIDAE)
- araucana, Acmaea araucana D'Orbigny, 1841 - syn of: Scurria araucana (A.V.M.D. D'Orbigny, 1839) - (ACMAEIDAE)
- araucana, Gervillella araucana Damborenea, 1987 † - (BAKEVELLIIDAE) (FOSSIL)
- araucana, Trochita araucana R.A. Philippi, 1887 † - (CALYPTRAEIDAE) (FOSSIL)
- araucana, Austrolittorina araucana (A.V.M.D. D'Orbigny, 1840) - (LITTORINIDAE)
- araucana, Nodilittorina araucana D'Orbigny, 1840 - syn of: Austrolittorina araucana (A.V.M.D. D'Orbigny, 1840) - (LITTORINIDAE)
- araucana, Scurria araucana (A.V.M.D. D'Orbigny, 1839) - (LOTTIIDAE)
- araucana, Collisella araucana W.H. Dall, 1871 - syn of: Scurria araucana (A.V.M.D. D'Orbigny, 1839) - (LOTTIIDAE)
- araucana, Patelloida araucana H.A. Pilsbry, 1891 - syn of: Scurria araucana (A.V.M.D. D'Orbigny, 1839) - (LOTTIIDAE)
- araucana, Myophorella araucana H.A. Leanza, 1942 † - (MYOPHORELLIDAE) (FOSSIL)
- araucana, Patella araucana D'Orbigny, 1841 - syn of: Scurria araucana (A.V.M.D. D'Orbigny, 1839) - (PATELLIDAE)
- araucana, Melania araucana R.A. Philippi, 1887 † - (THIARIDAE) (FOSSIL)
- araucana, Eurhomalea araucana R.A. Philippi, 1887 - syn of: Eurhomalea exalbida (L.W. Dillwyn, 1817) - (VENERIDAE)
- araucana, Paludina araucana R.A. Philippi, 1887 † - (VIVIPARIDAE) (FOSSIL)
- araucanae, Chaetoderma araucanae R.C. Osorio & E.S. Tarifeño, 1976 - (CHAETODERMATIDAE)
- Araucanites, Genus Araucanites Westermann & Riccardi † (SPHAEROCERATIDAE) (FOSSIL)
- araucanus, Hemichenopus araucanus (R.A. Philippi, 1887 †) - (APORRHAIDAE) (FOSSIL)
- araucanus, Plectostylus araucanus C. Valdovinos & J. Stuardo, 1988 - (BOTHRIEMBRYONTIDAE)
- araucanus, Viluceras araucanus H.A. Leanza, 1958 † - (OLCOSTEPHANIDAE) (FOSSIL)
- araucanus, Xenocephalites araucanus Burckhardt, 1903 † - (SPHAEROCERATIDAE) (FOSSIL)
- araucanus, Diloma araucanus D'Orbigny, 1841 - syn of: Diloma nigerrima (J.F. Gmelin, 1791) - (TROCHIDAE)
- araucanus, Unio araucanus R.A. Philippi, 1847 - syn of: Diplodon chilensis (J.E. Gray, 1852) - (UNIONIDAE)
- araucariana, Squamopleura araucariana (C. Hedley, 1898) - (CHITONIDAE)
- araucarianus, Squamopleura araucarianus C. Hedley, 1898 - syn of: Squamopleura araucariana (C. Hedley, 1898) - (CHITONIDAE)
- Araucocharopa, Genus Araucocharopa F.A.W. Miquel & L. Cádiz (CHAROPIDAE)
- araujoi, Simpulopsis araujoi A.S.H. Breure, 1975 - (SIMPULOPSIDAE)
- arausiaca, Harpulina arausiaca (J. Lightfoot, 1786) - (VOLUTIDAE)
- arausiaca vexillum, Harpulina arausiaca vexillum (J.F. Gmelin, 1791) - (VOLUTIDAE)
- arausiensis, Conus arausiensis L.A. Reeve, 1843 - syn of: Dauciconus daucus (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- arausionensis, Hyphoplites curvatus arausionensis (Hébert & E.C. Munier-Chalmas, 1875 †) - (HOPLITIDAE) (FOSSIL)
- aravanense, Umbetoceras aravanense Ruzhencev & Bogoslovskaya, 1978 † - (HOMOCERATIDAE) (FOSSIL)
- aravanensis, Schartymites aravanensis Ruzhencev & Bogoslovskaya, 1978 † - (STENOGLAPHYRITIDAE) (FOSSIL)
- arawak, Conasprella arawak (E.J. Petuch & B.W. Myers, 2014) - (CONIDAE)
- arawak, Jaspidiconus arawak E.J. Petuch & B.W. Myers, 2014 - syn of: Conasprella arawak (E.J. Petuch & B.W. Myers, 2014) - (CONIDAE)
- arawakorum, Haplocochlias arawakorum F. Rubio & E. Rolán, 2015 - (SKENEIDAE)
- araxena, Gabbiella araxena N.N. Akramowski, 1970 - (BITHYNIIDAE)
- araxena, Buliminus araxena W.A. Lindholm, 1923 - syn of: Ljudmilena sieversi (A. Mousson, 1873) - (ENIDAE)
- araxensis, Xenodiscus araxensis Shevyrev, 1965 † - syn of: Xenodiscus dorashamensis Shevyrev, 1965 † - (MEEKOCERATIDAE) (FOSSIL)
- araxenus, Unio araxenus H. Drouët, 1881 - syn of: Unio crassus L. Philipsson in A. Retzius, 1788 - (UNIONIDAE)
- Araxoceras, Genus Araxoceras Ruzhencev , 1959 † (ARAXOCERATIDAE) (FOSSIL)
- ARAXOCERATIDAE Ruzhencev, 1959 † - Family (CEPHALOPODA-AMMONOIDEA-CERATITIDA) (FOSSIL)
- Araxonautilus, Genus Araxonautilus Shimanskiy , 1979 † (TAINOCERATIDAE) (FOSSIL)
- arayae, Scutellastra arayae C. Nielsen & B.M. Landau, 2014 † - (PATELLIDAE) (FOSSIL)
- arayaensis, Amarophos arayaensis B.M. Landau & F. Da Silva, 2012 † - (BUCCINIDAE) (FOSSIL)
- arayaensis, Strombus arayaensis B.M. Landau & C.M. da Silva, 2010 † - (STROMBIDAE) (FOSSIL)
- arayai, Turbonilla arayai (S. Nomura, 1936) - (PYRAMIDELLIDAE)
- arayai, Chemnitzia arayai S. Nomura, 1936 - syn of: Turbonilla arayai (S. Nomura, 1936) - (PYRAMIDELLIDAE)
- arayana, Arayina arayana (Gibson-Smith, 1974 †) - (COLUMBELLIDAE) (FOSSIL)
- Arayana, syn of: Subgenus Strombina (Arayina) P.O. Jung, 1989 † (COLUMBELLIDAE) (FOSSIL)
- Arayiana, syn of: Subgenus Strombina (Arayina) P.O. Jung, 1989 † (COLUMBELLIDAE) (FOSSIL)
- Arayina, Subgenus Strombina (Arayina) P.O. Jung, 1989 † (COLUMBELLIDAE) (FOSSIL)
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