- ardassiensis, Cucullaea ardassiensis Arkell † - (CUCULLAEIDAE) (FOSSIL)
- Ardeadoris, Genus Ardeadoris W.B. Rudman, 1984 (CHROMODORIDIDAE)
- ardeae, Eatonina ardeae W.F. Ponder & E.K. Yoo, 1980 - (CINGULOPSIDAE)
- Ardeamya, syn of: Genus Psammotreta W.H. Dall, 1900 (TELLINIDAE)
- ardenensis, Euphemites urei ardenensis Weir, 1931 † - (EUPHEMITIDAE) (FOSSIL)
- ardeni, Tengchiena ardeni (T. Iredale, 1937) - (EUCONULIDAE)
- ardens, Gibbula ardens (C.U.A. von Salis-Marschlins, 1793) - (TROCHIDAE)
- ardens cinerea, Gibbula ardens cinerea T.A. de M. Monterosato, 1888 - syn of: Gibbula ardens (C.U.A. von Salis-Marschlins, 1793) - (TROCHIDAE)
- ardens clausa, Gibbula ardens clausa T.A. de M. Monterosato, 1888 - syn of: Gibbula ardens (C.U.A. von Salis-Marschlins, 1793) - (TROCHIDAE)
- ardens cupa, Gibbula ardens cupa T.A. de M. Monterosato, 1888 - syn of: Gibbula ardens (C.U.A. von Salis-Marschlins, 1793) - (TROCHIDAE)
- ardens fusca, Gibbula ardens fusca T.A. de M. Monterosato, 1888 - syn of: Gibbula ardens (C.U.A. von Salis-Marschlins, 1793) - (TROCHIDAE)
- ardens globosa, Gibbula ardens globosa T.A. de M. Monterosato, 1888 - syn of: Gibbula ardens (C.U.A. von Salis-Marschlins, 1793) - (TROCHIDAE)
- ardens grisea, Gibbula ardens grisea T.A. de M. Monterosato, 1888 - syn of: Gibbula ardens (C.U.A. von Salis-Marschlins, 1793) - (TROCHIDAE)
- ardens maculata, Gibbula ardens maculata T.A. de M. Monterosato, 1888 - syn of: Gibbula ardens (C.U.A. von Salis-Marschlins, 1793) - (TROCHIDAE)
- ardens minor, Gibbula ardens minor P.M. Pallary, 1938 - syn of: Gibbula ardens (C.U.A. von Salis-Marschlins, 1793) - (TROCHIDAE)
- ardens modesta, Gibbula ardens modesta P.M. Pallary, 1938 - syn of: Gibbula ardens (C.U.A. von Salis-Marschlins, 1793) - (TROCHIDAE)
- ardens ornata, Trochus ardens ornata M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1884 - syn of: Gibbula ardens (C.U.A. von Salis-Marschlins, 1793) - (TROCHIDAE)
- ardens subcincta, Gibbula ardens subcincta T.A. de M. Monterosato, 1888 - (TROCHIDAE)
- ardeola, Vasum ardeola A. Valenciennes, 1832 - syn of: Vasum caestus (W.J. Broderip, 1833) - (TURBINELLIDAE)
- ardesa, Monacha ardesa J.F. Mabille, 1881 - syn of: Eutheba cantiana (G. Montagu, 1803) - (HYGROMIIDAE)
- Ardescia, Subgenus Orthosphinctes (Ardescia) Atrops, 1982 (ATAXIOCERATIDAE) (FOSSIL)
- Ardesciella, Genus Ardesciella Bulot & al., 2014 (HIMALAYITIDAE) (FOSSIL)
- ardesicus, Discosphinctes ardesicus (C.F. Fontannes, 1879 †) - (PERISPHINCTIDAE) (FOSSIL)
- ardgowanica, Yoldiella ardgowanica (Powell, 1935 †) - (YOLDIIDAE) (FOSSIL)
- ardica, Helicigona ardica (I. Dedov & P. Subai, 2006) - (HELICIDAE)
- ardiniana, Cuspidaria ardiniana S. Biondi-Giunti, 1860 - syn of: Cuspidaria rostrata (L. Spengler, 1793) - (CUSPIDARIIDAE)
- Ardiniella, syn of: Genus Andiniella W.K. Weyrauch, 1958 (CLAUSILIIDAE)
- ardisiaceus, Ketyconus ardisiaceus (L.C. Kiener, 1850) - (CONIDAE)
- ardleyensis, Aphanoptyxis ardleyensis Arkell, 1931 † - (OPISTHOBRANCHIA (UNASSIGNED)) (FOSSIL)
- ardmillanensis, Hyolithes ardmillanensis Reed, 1909 † - syn of: Leolites ardmillanensis (Reed, 1909 †) - (HYOLITHIDAE) (FOSSIL)
- ardmillanensis, Leolites ardmillanensis (Reed, 1909 †) - (PAUXILLITIDAE) (FOSSIL)
- ardmorensis, Glyphiolobus ardmorensis (Elias, 1951 †) - (DIMORPHOCERATIDAE) (FOSSIL)
- ardosiaea, Cellana ardosiaea (J.B. Hombron & C.H. Jacquinot, 1841) - (NACELLIDAE)
- ardosiaea, Patella ardosiaea J.B. Hombron & C.H. Jacquinot, 1841 - syn of: Cellana ardosiaea (J.B. Hombron & C.H. Jacquinot, 1841) - (PATELLIDAE)
- ardosidea, Cellana ardosidea (J.B. Hombron & C.H. Jacquinot, 1841) - (NACELLIDAE)
- ardosioea, Cellana ardosioea (J.B. Hombron & C.H. Jacquinot, 1841) - (NACELLIDAE)
- ardouini, Epiphragmophora ardouini (A.V.M.D. D'Orbigny, 1835) - (EPIPHRAGMOPHORIDAE)
- ardouiniana, Grandinenia ardouiniana (P.M. Heude, 1882) - (CLAUSILIIDAE)
- ardouiniana, Littoraria ardouiniana (P.M. Heude, 1885) - (LITTORINIDAE)
- ardovinii, Gibberula ardovinii T. Cossignani, 2006 - (CYSTISCIDAE)
- ardovinii, Sorgenfreispira ardovinii (P. Mariottini & M. Oliverio, 2008) - (MANGELIIDAE)
- ardovinii, Bela ardovinii P. Mariottini & M. Oliverio, 2008 - syn of: Sorgenfreispira ardovinii (P. Mariottini & M. Oliverio, 2008) - (MANGELIIDAE)
- ardovinii, Volvarina ardovinii T. Cossignani, 1997 - (MARGINELLIDAE)
- Ardrossania, Genus Ardrossania Bengtson & al., 1990 (KHAIRKHANIIDAE) (FOSSIL)
- ardua, Australoscutula ardua Cook & al., 2007 † - (PRAGOSCUTULIDAE) (FOSSIL)
- ardua, Cosmasyrinx ardua J. Marwick, 1931 † - (TURRIDAE) (FOSSIL)
- arduennense, Peltoceratoides williamsoni arduennense (A.V.M.D. D'Orbigny, 1847 †) - (ASPIDOCERATIDAE) (FOSSIL)
- arduennense, Beudanticeras arduennense Breistroffer, 1961 † - (DESMOCERATIDAE) (FOSSIL)
- arduennense, Anetoceras arduennense (Steininger, 1853 †) - (MIMOSPHINCTIDAE) (FOSSIL)
- arduennense, Paracenoceras arduennense (A.V.M.D. D'Orbigny, 1850 †) - (PARACENOCERATIDAE) (FOSSIL)
- arduennensis, Cyrtoceratites arduennensis Steininger, 1853 † - syn of: Anetoceras arduennense (Steininger, 1853 †) - (ARCHIACOCERATIDAE) (FOSSIL)
- arduennensis, Parawedekindia arduennensis (A.V.M.D. D'Orbigny, 1848 †) - (ASPIDOCERATIDAE) (FOSSIL)
- arduennensis, Astarte arduennensis A.V.M.D. D'Orbigny, 1845 † - (ASTARTIDAE) (FOSSIL)
- arduennensis, Nautilus arduennensis d'Orbigny, 1850 † - syn of: Paracenoceras arduennense (A.V.M.D. D'Orbigny, 1850 †) - (NAUTILIDAE) (FOSSIL)
- arduennensis, Trigonia arduennensis (Rollier, 1912 †) - (TRIGONIIDAE) (FOSSIL)
- arduini, Cardita arduini A. Brongniart, 1823 † - (CARDITIDAE) (FOSSIL)
- arduinii, Joculator arduinii A. Cecalupo & I. Perugia, 2012 - (CERITHIOPSIDAE)
- arduum, Devonozyga arduum (Kirchner, 1915 †) - (PALAEOZYGOPLEURIDAE) (FOSSIL)
- areaensis, Opanara areaensis G.A. Solem, 1976 - (ENDODONTIDAE)
- areafurcata, Trigonia areafurcata Vetters, 1905 † - (TRIGONIIDAE) (FOSSIL)
- arealis, Anodonta arealis H.C. Küster, 1842 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- arechavalettoi, Mesodesma arechavalettoi H.A. Pilsbry, 1897 - syn of: Amarilladesma mactroides (L.A. Reeve, 1854) - (MESODESMATIDAE)
- areia, Mangelia areia W.H. Dall, 1927 - syn of: Belomitra pourtalesii (W.H. Dall, 1881) - (MANGELIIDAE)
- areiensis, Caseolus innominatus areiensis H.W. Waldén, 1983 - (HYGROMIIDAE)
- areiensis, Volsellina areiensis R.J. Neves & al., 2014 † - (MYTILIDAE) (FOSSIL)
- arelatensis, Anodonta arelatensis D. Dupuy, 1850 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- arelela, Glyptospira arelela Plas, 1972 † - (MICRODOMATIDAE) (FOSSIL)
- arellanoi, Holospira arellanoi (P. Bartsch, 1945) - (UROCOPTIDAE)
- Aremella, Genus Aremella (ARCHAEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- Aremellia, Genus Aremellia Webers & al., 1992 (METOPTOMATIDAE) (FOSSIL)
- aremna, Corbicula aremna P.M. Pallary, 1909 - syn of: Corbicula fluminalis (O.F. Müller, 1774) - (CYRENIDAE)
- aremuum, Leiorhagium aremuum M. Haase & S. Zielske, 2015 - (HYDROBIIDAE)
- arena, Pattyclaya arena (C.H. Carlson & P.J. Hoff, 1978) - (PLAKOBRANCHIDAE)
- arena, Parachondria arena C.B. Adams, 1849 - syn of: Parachondria avena (C.B. Adams, 1849) - (POMATIIDAE)
- arenacea, Mytilarca arenacea J.W. Hall & R.P. Whitfield, 1869 † - (AMBONYCHIIDAE) (FOSSIL)
- arenacea, Leptothyra arenacea G.B. Pritchard & J.H. Gatliff, 1902 - syn of: Charisma arenacea (G.B. Pritchard & J.H. Gatliff, 1902) - (COLLONIIDAE)
- arenacea, Canavarella arenacea Buckman † - (GRAPHOCERATIDAE) (FOSSIL)
- arenacea, Saxicava arenacea E.A. Smith, 1910 - syn of: Hiatella arctica (C. Linnaeus, 1767) - (HIATELLIDAE)
- arenacea, Neocancilla arenacea (R.W. Dunker, 1852) - (MITRIDAE)
- arenacea, Neridomus arenacea (Terquem, 1855 †) - (NERIDOMIDAE) (FOSSIL)
- arenacea, Neritina arenacea Terquem, 1855 † - syn of: Neridomus arenacea (Terquem, 1855 †) - (NERITIDAE) (FOSSIL)
- arenacea, Charisma arenacea (G.B. Pritchard & J.H. Gatliff, 1902) - (TROCHIDAE)
- arenaceus, Joculator arenaceus A. Cecalupo & I. Perugia, 2013 - (CERITHIOPSIDAE)
- arenacollicola, Procerithium arenacollicola J. Wild & J.D. Stilwell, 2016 † - (PROCERITHIIDAE) (FOSSIL)
- arenae, Thais arenae B.F. Kensley & Pether, 1986 † - (MURICIDAE) (FOSSIL)
- arenaense, Bittium arenaense L.G. Hertlein & A.M. Strong, 1951 - (CERITHIIDAE)
- arenaica, Parapuzosia arenaica Anderson, 1958 † - (DESMOCERATIDAE) (FOSSIL)
- arenalis, Musculus arenalis K.T. Menke, 1830 - syn of: Musculus lateralis (T. Say, 1822) - (MYTILIDAE)
- arenalis, Modiolus arenalis K.T. Menke, 1830 - syn of: Musculus lateralis (T. Say, 1822) - (MYTILIDAE)
- arenaria, Achatina bandeirana arenaria T.E. Crowley & T. Pain - (ACHATINIDAE)
- arenaria, Amalda arenaria A.E.M. Cossmann, 1889 † - (ANCILLARIIDAE) (FOSSIL)
- arenaria, Anchura arenaria (Morton, 1834 †) - (APORRHAIDAE) (FOSSIL)
- arenaria, Suessionia arenaria A.E.M. Cossmann, 1889 † - (BUCCINIDAE) (FOSSIL)
- arenaria, Chauvetia turritellata arenaria T.A. de M. Monterosato - (BUCCINIDAE)
- arenaria, Heleobia arenaria (J.R. Bourguignat, 1862) - (COCHLIOPIDAE)
- arenaria, Costasiella arenaria K.R. Jensen, K. Krug, A. DuPont & M. Nishina, 2014 - (COSTASIELLIDAE)
- arenaria, Acrostemma coronata arenaria A.E.M. Cossmann, 1889 † - (CYLICHNIDAE) (FOSSIL)
- arenaria, Helicella arenaria L. de Folin - syn of: Helicella itala (C. Linnaeus, 1758) - (HYGROMIIDAE)
- arenaria, Lymnaea arenaria J.A.J. Colbeau, 1865 - syn of: Lymnaea stagnalis (C. Linnaeus, 1758) - (LYMNAEIDAE)
- arenaria, Glabella denticulata arenaria O.A.L. Mörch, 1852 - (MARGINELLIDAE)
- arenaria, Plethospira arenaria (Billings, 1859 †) - (MURCHISONIIDAE) (FOSSIL)
- arenaria, Attiliosa arenaria Darragh, 2017 † - (MURICIDAE) (FOSSIL)
- arenaria, Mya arenaria C. Linnaeus, 1758 - (MYIDAE)
- arenaria, Mya arenaria J.S. Schröter, 1779 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (MYIDAE)
- arenaria, Crenella arenaria T.A. de M. Monterosato, 1875 - (MYTILIDAE)
- arenaria, Rhomboidella prideauxi arenaria (A. Martin, 1872) - (MYTILIDAE)
- arenaria, Austronucula arenaria Darragh 1997 † - (NUCULIDAE) (FOSSIL)
- arenaria, Pleurotomaria arenaria Girty, 1909 † - (PLEUROTOMARIIDAE) (FOSSIL)
- arenaria, Onoba arenaria J.W. Mighels, 1842 - syn of: Onoba aculeus (Gould, 1841) - (RISSOIDAE)
- arenaria, Cingula arenaria Auct. non W.G. Maton & T. Rackett, 1807 - syn of: Onoba mighelsii (W. Stimpson, 1851) - (RISSOIDAE)
- arenaria, Scrobicularia arenaria H.C.F. Schumacher, 1817 - syn of: Scrobicularia plana (E.M. Da Costa, 1778) - (SCROBICULARIIDAE)
- Arenaria, syn of: Genus Scrobicularia H.C.F. Schumacher, 1815 (SCROBICULARIIDAE)
- arenaria, Quickella arenaria (V.L.V. Potiez & A. Michaud, 1838) - (SUCCINEIDAE)
- arenaria, Catinella arenaria (N.R. Bouchard-Chantereaux, 1837) - (SUCCINEIDAE)
- arenaria, Catinella arenaria N.R. Bouchard-Chantereaux, 1837 - syn of: Catinella arenaria (N.R. Bouchard-Chantereaux, 1837) - (SUCCINEIDAE)
- arenaria, Serpula arenaria C. Linnaeus, 1758 - syn of: Thylacodes arenarius (C. Linnaeus, 1758) - (VERMETIDAE)
- arenaria corbuloides, Mya arenaria corbuloides A. Comfort, 1938 - syn of: Mya arenaria C. Linnaeus, 1758 - (MYIDAE)
- arenaria oonogai, Mya arenaria oonogai J. Makiyama, 1935 - (MYIDAE)
- arenaria ovata, Mya arenaria ovata A.S. Jensen, 1900 - syn of: Mya arenaria C. Linnaeus, 1758 - (MYIDAE)
- arenaria sertunayensis, Mya arenaria sertunayensis Lautenschläger, 1953 † - syn of: Mya arenaria C. Linnaeus, 1758 - (MYIDAE) (FOSSIL)
- arenarium, Dentalium arenarium H.H. Suter, 1909 - syn of: Antalis suteri (W.K. Emerson, 1954) - (DENTALIIDAE)
- arenarium, Proscutum arenarium (A. Watelet, 1853 †) - (LOTTIIDAE) (FOSSIL)
- arenarium, Tessaripoma arenarium Watters, 2016 - (POMATIIDAE)
- arenarium pyramidale, Proscutum arenarium pyramidale (A.E.M. Cossmann, 1882 †) - (LOTTIIDAE) (FOSSIL)
- arenarius, Acroloxus arenarius A.E.M. Cossmann, 1889 † - (ACROLOXIDAE) (FOSSIL)
- arenarius, Murex arenarius W.J. Clench & I. Pérez Farfante, 1945 - syn of: Chicoreus florifer (L.A. Reeve, 1846) - (MURICIDAE)
- arenarius, Septaria arenarius J.B.P.A. Lamarck, 1818 - syn of: Kuphus polythalamia (C. Linnaeus, 1767) - (NERITIDAE)
- arenarius, Prionites arenarius L. Waagen, 1895 † - (PRIONITIDAE) (FOSSIL)
- arenarius, Kuphus arenarius J.B.P.A. Lamarck, 1818 - syn of: Kuphus polythalamia (C. Linnaeus, 1767) - (TEREDINIDAE)
- arenarius, Thylacodes arenarius (C. Linnaeus, 1758) - (VERMETIDAE)
- arenarius, Serpulus arenarius C. Linnaeus, 1758 - syn of: Thylacodes arenarius (C. Linnaeus, 1758) - (VERMETIDAE)
- arenarius, Vermetus arenarius C. Linnaeus, 1758 - syn of: Thylacodes arenarius (C. Linnaeus, 1758) - (VERMETIDAE)
- arenarius, Serpulorbis arenarius C. Linnaeus, 1767 - syn of: Thylacodes arenarius (C. Linnaeus, 1758) - (VERMETIDAE)
- arenarius gracilior, Serpulus arenarius gracilior O.A.L. Mörch, 1859 - syn of: Thylacodes arenarius (C. Linnaeus, 1758) - (VERMETIDAE)
- arenarius minor, Vermetus arenarius minor F. Sacco, 1896 - syn of: Thylacodes arenarius (C. Linnaeus, 1758) - (VERMETIDAE)
- arenarius pseudodentifer, Thylacodes arenarius pseudodentifer A.E.M. Cossmann & M.A. Peyrot, 1922 † - (VERMETIDAE) (FOSSIL)
- arenarius turonensis, Thylacodes arenarius turonensis G.P. Deshayes, 1839 † - (VERMETIDAE) (FOSSIL)
- arenarum, Amastra umbilicata arenarum H.A. Pilsbry & C.M. Cooke, 1914 - (AMASTRIDAE)
- arenarum, Hydrobia arenarum J.R. Bourguignat, 1876 - syn of: Ecrobia ventrosa (G. Montagu, 1803) - (HYDROBIIDAE)
- arenarum, Besla arenarum E. Saurin, 1959 - (PYRAMIDELLIDAE)
- arenarum, Unio arenarum J.R. Bourguignat, 1882 - syn of: Unio arcuatus N.R. Bouchard-Chantereaux, 1838 - (UNIONIDAE)
- arenasia, Bulla arenasia H.F.A. von Ihering, 1907 † - (BULLIDAE) (FOSSIL)
- arenata, Crepidula arenata (W.J. Broderip, 1834) - (CALYPTRAEIDAE)
- arenata, Iridina arenata F. Cailliaud, 1823 - syn of: Chambardia rubens (J.B.P.A. Lamarck, 1819) - (IRIDINIDAE)
- arenata, Papilliceras arenata (F.A. von Quenstedt †) - (SONNINIIDAE) (FOSSIL)
- arenatus, Puncticulis arenatus (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- arenatus, Conus arenatus P.F. Röding, 1798 - syn of: Textilia stercusmuscarum (C. Linnaeus, 1758) - (CONIDAE)
- arenatus aequipunctata, Conus arenatus aequipunctata P. Dautzenberg, 1937 - syn of: Puncticulis arenatus (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- arenatus bizona, Conus arenatus bizona H.E. Coomans, R.G. Moolenbeek & E. Wils, 1981 - syn of: Puncticulis arenatus (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- arenatus mesokatharos, Conus arenatus mesokatharos G.W. Tryon, 1884 - syn of: Puncticulis arenatus (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- arenatus undata, Conus arenatus undata P. Dautzenberg, 1937 - syn of: Puncticulis arenatus (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- Arene, Genus Arene H. Adams & A. Adams, 1854 (ARENEIDAE)
- ARENEIDAE Adams, 1854 - Family (GASTROPODA-VETIGASTROPODA [Subclass]-ANGARIOIDEA [Superfamily])
- arenensis, Elaeocyma arenensis (L.G. Hertlein & A.M. Strong, 1951) - (DRILLIIDAE)
- arenensis, Persististrombus latus arenensis (F.R. Bernard, 1982) - (STROMBIDAE)
- areneosa, Lottia areneosa (A.A. Gould, 1846) - (LOTTIIDAE)
- arenica, Littorina arenica R.W. Dunker, 1845 - syn of: Tectarius striatus (P.P. King, 1832) - (LITTORINIDAE)
- arenica, Littorina arenica J.C. Jay, 1839 - syn of: Tectarius striatus (P.P. King, 1832) - (LITTORINIDAE)
- arenicola, Tasmeuthria arenicola Darragh, 2017 † - (BUCCINIDAE) (FOSSIL)
- arenicola, Vasticardium arenicola (L.A. Reeve, 1845 †) - (CARDIIDAE) (FOSSIL)
- arenicola, Edouardia arenicola (W.H. Benson, 1856) - (CERASTUIDAE)
- arenicola, Cochlostoma hellenicum arenicola (A.de Saint-Simon, 1869) - (COCHLOSTOMATIDAE)
- arenicola, Naticopsis arenicola (L. Waagen, 1880 †) - (DELPHINULOPSIDAE) (FOSSIL)
- arenicola, Cratena arenicola (E. Forbes, MS J. Alder & A. Hancock, 1847) - (FACELINIDAE)
- arenicola, Fissurella arenicola A. de Rochebrune & J.F. Mabille, 1885 - syn of: Fissurella oriens G.B. I Sowerby, 1834 - (FISSURELLIDAE)
- arenicola, Succincta arenicola (P.M.A. Morelet, 1849) - (HELICINIDAE)
- arenicola, Hiatella arenicola Terquem, 1855 † - (HIATELLIDAE) (FOSSIL)
- arenicola, Discula polymorpha arenicola (R.T. Lowe, 1831) - (HYGROMIIDAE)
- arenicola, Meiomenia arenicola L. Salvini-Plawén & W. Sterrer, 1985 - (MEIOMENIIDAE)
- arenicola, Amphioctopus arenicola Huffard & F.G. Hochberg, 2005 - (OCTOPODIDAE)
- arenicola, Ostrea arenicola R. Tate, 1886 † - (OSTREIDAE) (FOSSIL)
- arenicola, Phasianella arenicola L. Waagen, 1880 † - syn of: Naticopsis arenicola (L. Waagen, 1880 †) - (PHASIANELLIDAE) (FOSSIL)
- arenicola, Edentulina arenicola (P.M.A. Morelet, 1860;) - (STREPTAXIDAE)
- arenicola, Palmerella arenicola (T.A. Conrad, 1865 †) - (TURRITELLIDAE) (FOSSIL)
- arenicola raresulcata, Succincta arenicola raresulcata (L. Pfeiffer, 1861) - (HELICINIDAE)
- arenicola succincta, Succincta arenicola succincta E.C. Von Martens, 1890 - syn of: Succincta succincta (E.C. Von Martens, 1890) - (HELICINIDAE)
- arenicolum, Cardium arenicolum L.A. Reeve, 1845 - syn of: Acrosterigma maculosum (W. Wood, 1815) - (CARDIIDAE)
- arenicum, Extropharciceras arenicum (Petter, 1959 †) - (PHARCICERATIDAE) (FOSSIL)
- Arenifodiens, Genus Arenifodiens B.R. Wilson, 2006 (MYTILIDAE)
- Arenigomya, Genus Arenigomya Cope, 1996 (ARENIGOMYIDAE) (FOSSIL)
- ARENIGOMYIDAE Carter, 2011 - Family (BIVALVIA-HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-PHOLADOMYOIDEA [Superfamily]) (FOSSIL)
- Arenimitra, syn of: Subgenus Vexillum (Costellaria) W.J. Swainson, 1840 (COSTELLARIIDAE)
- arenivaga, Eucithara arenivaga C. Hedley, 1922 - (MANGELIIDAE)
- arennigense, Castelloceras arennigense J. Evans, 2005 † - (BALTOCERATIDAE) (FOSSIL)
- arenofunus, Philonesia arenofunus H.B. Baker, 1940 - (EUCONULIDAE)
- Arenolyonsiella, syn of: Genus Lyonsia W.H. Turton, 1822 (LYONSIIDAE)
- Arenomya, Subgenus Mya (Arenomya) Winkworth, 1930 (MYIDAE) (FOSSIL)
- Arenomya, syn of: Genus Mya C. Linnaeus, 1758 (MYIDAE)
- arenophila, Macrocallista arenophila H.F.A. von Ihering, 1907 † - (VENERIDAE) (FOSSIL)
- arenosa, Alaria arenosa W.H. Hudleston, 1884 † - (APORRHAIDAE) (FOSSIL)
- arenosa, Calliotropis arenosa Helwerda, Wesselingh & S.T. Williams, 2014 † - (CALLIOTROPIDAE) (FOSSIL)
- arenosa, Liolophura arenosa (A. Ferreira, 1986) - (CHITONIDAE)
- arenosa, Erosaria arenosa L.W. Dillwyn, 1823 - syn of: Erosaria turdus (J.B.P.A. Lamarck, 1810) - (CYPRAEIDAE)
- arenosa, Lyncina arenosa J.E. Gray, 1824 - syn of: Lyncina schilderorum (T. Iredale, 1939) - (CYPRAEIDAE)
- arenosa, Dendrodoris arenosa J.J. Risbec, 1930 - syn of: Dendrodoris nicobarica (L.S.R. Bergh, 1875) - (DENDRODORIDIDAE)
- arenosa, Helix arenosa I. Krynicki, 1836 - syn of: Helicopsis dejecta (G.J. De Cristofori & G. Jan, 1832) - (HELICIDAE)
- arenosa, Helicella arenosa D. Dupuy, 1850 - syn of: Helicella itala (C. Linnaeus, 1758) - (HYGROMIIDAE)
- arenosa, Lyonsia arenosa (H.P.C. Møller, 1842) - (LYONSIIDAE)
- arenosa, Pandorina arenosa H.P.C. Møller, 1842 - syn of: Lyonsia arenosa (H.P.C. Møller, 1842) - (LYONSIIDAE)
- arenosa, Mitra arenosa J.B.P.A. Lamarck, 1822 - syn of: Vexillum exasperatum (J.F. Gmelin, 1791) - (MITRIDAE)
- arenosa, Pandora arenosa T.A. Conrad, 1834 - (PANDORIDAE)
- arenosa, Rhineoderma arenosa de Koninck, 1883 † - (PLATYCERATIDAE) (FOSSIL)
- arenosa, Asaphis arenosa G.E. Rumphius, 1705 - syn of: Asaphis violascens (P. Forsskål in C. Niebuhr, 1775) - (PSAMMOBIIDAE)
- arenosa, Pyramidella arenosa T.A. Conrad, 1843 - syn of: Longchaeus suturalis (H.C. Lea, 1843) - (PYRAMIDELLIDAE)
- arenosa, Scaliola arenosa A. Adams, 1862 - (SCALIOLIDAE)
- arenosa, Lissotesta arenosa C.F. Laseron, 1954 - (SEGUENZIOIDEA (UNASSIGNED))
- arenosa, Granigyra arenosa A. Warén, 1993 - (SEGUENZIOIDEA (UNASSIGNED))
- arenosa, Thracidora arenosa (C. Hedley, 1904) - (THRACIIDAE)
- arenosa, Thraciopsis arenosa C. Hedley, 1904 - syn of: Thracidora arenosa (C. Hedley, 1904) - (THRACIIDAE)
- arenosa, Osilinus arenosa T.A. de M. Monterosato, 1923 - syn of: Phorcus articulatus (J.B.P.A. Lamarck, 1822) - (TROCHIDAE)
- arenosa, Hemipleurotoma arenosa A.A. Olsson, 1930 † - (TURRIDAE) (FOSSIL)
- arenosa bistriata, Xerophila arenosa bistriata Puzanov, 1926 - syn of: Helicopsis dejecta (G.J. De Cristofori & G. Jan, 1832) - (HYGROMIIDAE)
- arenosa sibirica, Lyonsia arenosa sibirica W. Leche, 1883 - syn of: Lyonsia arenosa (H.P.C. Møller, 1842) - (LYONSIIDAE)
- arenosa tarasovi, Lyonsia arenosa tarasovi O.A. Scarlato, 1981 - syn of: Lyonsia arenosa (H.P.C. Møller, 1842) - (LYONSIIDAE)
- arenosus, Clypeoceras arenosus (L. Waagen, 1895 †) - (CLYPEOCERATIDAE) (FOSSIL)
- arenosus, Aspidites arenosus L. Waagen, 1895 † - syn of: Clypeoceras arenosus (L. Waagen, 1895 †) - (CLYPEOCERATIDAE) (FOSSIL)
- arenosus, Conus arenosus P.F. Röding, 1798 - syn of: Puncticulis arenatus (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- arenosus, Gyronites arenosus L. Waagen, 1895 † - (PROPTYCHITIDAE) (FOSSIL)
- arenula, Liotia arenula E.A. Smith, 1890 - (LIOTIIDAE)
- arenula, Ovaginella arenula Darragh, 2017 † - (MARGINELLIDAE) (FOSSIL)
- arenularia, Lymnaea arenularia G.P. Deshayes, 1825 † - (LYMNAEIDAE) (FOSSIL)
- arenularia, Amauropsina arenularia (Vasseur, 1882 †) - (NATICIDAE) (FOSSIL)
- arenularius, Musculus arenularius Raincourt & Munier, 1863 † - (MYTILIDAE) (FOSSIL)
- arenulatis, Potamidopsis tricarinatus arenulatis Boussac, 1905 † - (POTAMIDIDAE) (FOSSIL)
- areola, Stylocheilus areola W.H. Pease, 1860 - syn of: Stylocheilus longicauda (J.R.C. Quoy & J.P. Gaimard, 1825) - (APLYSIIDAE)
- areola, Heliacus areola (J.F. Gmelin, 1791) - (ARCHITECTONICIDAE)
- areola, Phalium areola (C. Linnaeus, 1758) - (CASSIDAE)
- areola, Semicassis areola E.J. Burrow, 1815 - syn of: Semicassis bisulcata (G.H. Schubert & J.A. Wagner, 1829) - (CASSIDAE)
- areola, Daphnella areola L.A. Reeve, 1845 - syn of: Daphnella aureola (L.A. Reeve, 1845) - (RAPHITOMIDAE)
- areola bicanaliculatus, Heliacus areola bicanaliculatus (A. Valenciennes, 1832) - (ARCHITECTONICIDAE)
- areolata, Babylonia areolata (J.H.F. Link, 1807) - (BABYLONIIDAE)
- areolata, Calocochlia luzonica areolata W. Kobelt, 1908 - (BRADYBAENIDAE)
- areolata, Savatieria areolata H. Strebel, 1905 - (BUCCINIDAE)
- areolata, Lachesis areolata N. Tiberi, 1868 - syn of: Chauvetia lefebvrii (C. Maravigna, 1840) - (BUCCINIDAE)
- areolata, Phalium areolata H.C.F. Schumacher, 1817 - syn of: Phalium areola (C. Linnaeus, 1758) - (CASSIDAE)
- areolata, Doriopsilla areolata L.S.R. Bergh, 1880 - (DENDRODORIDIDAE)
- areolata, Dendrodoris areolata (J. Alder & A. Hancock, 1864) - (DENDRODORIDIDAE)
- areolata, Atagema areolata J. Alder & A. Hancock, 1864 - (DISCODORIDIDAE)
- areolata, Sclerodoris areolata P.M. Stuwitz, 1836 - syn of: Sclerodoris tuberculata C.N.E. Eliot, 1904 - (DISCODORIDIDAE)
- areolata, Doris areolata W. Stimpson, 1855 - (DORIDIDAE)
- areolata, Doris areolata P.M. Stuwitz, 1836 - syn of: Doris pseudoargus J.L. Rapp, 1827 - (DORIDIDAE)
- areolata, Doris areolata J. Alder & A. Hancock, 1864 - syn of: Dendrodoris areolata (J. Alder & A. Hancock, 1864) - (DORIDIDAE)
- areolata, Micrarionta areolata (G.B. III Sowerby in L. Pfeiffer, 1845) - (HELMINTHOGLYPTIDAE)
- areolata, Limopsis areolata M. Yokoyama, 1922 - syn of: Limopsis cumingi A. Adams, 1863 - (LIMOPSIDAE)
- areolata, Tanea areolata (C.A. Récluz, 1844) - (NATICIDAE)
- areolata, Turbonilla areolata A.E. Verrill, 1873 - syn of: Turbonilla interrupta (J.G. Totten, 1835) - (PYRAMIDELLIDAE)
- areolata, Chrysallida areolata A.G. de Rayneval & G. Ponzi, 1854 - syn of: Parthenina indistincta (G. Montagu, 1808) - (PYRAMIDELLIDAE)
- areolata, Daphnella areolata P. Stahlschmidt, G.T. Poppe & M. Chino, 2014 - (RAPHITOMIDAE)
- areolata, Alvania areolata W. Stimpson, 1851 - syn of: Tachyrhynchus reticulatus (J.W. Mighels & Adams, 1842) - (RISSOIDAE)
- areolata, Skenea areolata (G.O. Sars, 1878) - (SKENEIDAE)
- areolata, Oxymeris areolata (J.H.F. Link, 1807) - (TEREBRIDAE)
- areolata, Terebra areolata A. Adams & L.A. Reeve, 1850 - syn of: Myurella kilburni (R.D. Burch, 1965) - (TEREBRIDAE)
- areolata, Turritella areolata W. Stimpson, 1851 - syn of: Tachyrhynchus reticulatus (J.W. Mighels & Adams, 1842) - (TURRITELLIDAE)
- areolata, Dosinia areolata A. Römer, 1870 - (VENERIDAE)
- areolata, Kurinuia areolata (P. Marshall, 1919 †) - (VERTICORDIIDAE) (FOSSIL)
- areolata arida, Micrarionta areolata arida H.A. Pilsbry, 1913 - syn of: Micrarionta areolata (G.B. III Sowerby in L. Pfeiffer, 1845) - (HELMINTHOGLYPTIDAE)
- areolata aurantiaca, Babylonia areolata aurantiaca T. Cossignani, 2017 - (BABYLONIIDAE)
- areolata austraoceanensis, Babylonia areolata austraoceanensis T.C. Lan, 1997 - syn of: Babylonia areolata lani E. Gittenberger & J. Goud, 2003 - (BABYLONIIDAE)
- areolata candida, Babylonia areolata candida T. Cossignani, 2017 - (BABYLONIIDAE)
- areolata examinata, Micrarionta areolata examinata H.A. Pilsbry, 1913 - syn of: Micrarionta areolata (G.B. III Sowerby in L. Pfeiffer, 1845) - (HELMINTHOGLYPTIDAE)
- areolata lani, Babylonia areolata lani E. Gittenberger & J. Goud, 2003 - (BABYLONIIDAE)
- areolata multilineata, Babylonia areolata multilineata T. Cossignani, 2017 - (BABYLONIIDAE)
- areolata nigrolineata, Doriopsilla areolata nigrolineata K.B. Meyer, 1977 - syn of: Doriopsilla nigrolineata K.B. Meyer, 1977 - (DENDRODORIDIDAE)
- areolata scammoni, Micarionta areolata scammoni H.A. Pilsbry, 1913 - syn of: Micrarionta areolata (G.B. III Sowerby in L. Pfeiffer, 1845) - (HELMINTHOGLYPTIDAE)
- areolatum, Buccinum areolatum J.H.F. Link, 1807 - syn of: Babylonia areolata (J.H.F. Link, 1807) - (BUCCINIDAE)
- areolatum, Skenea areolatum G.O. Sars, 1878 - syn of: Skenea areolata (G.O. Sars, 1878) - (SKENEIDAE)
- areolatus, Amphidromus areolatus (L. Pfeiffer, 1861) - (CAMAENIDAE)
- areolatus, Rhinoclavis areolatus J.H.F. Link, 1807 - syn of: Oxymeris areolata (J.H.F. Link, 1807) - (CERITHIIDAE)
- areolatus, Modiolus areolatus (A.A. Gould, 1850) - (MYTILIDAE)
- areolatus, Mytilus areolatus A.A. Gould, 1850 - syn of: Modiolus areolatus (A.A. Gould, 1850) - (MYTILIDAE)
- areolatus, Octopus areolatus W. Van de Haan, 1839 - syn of: Amphioctopus fangsiao (A.V.M.D. D'Orbigny, 1839) - (OCTOPODIDAE)
- areolatus, Amphioctopus areolatus W. Van de Haan, 1839 - syn of: Amphioctopus fangsiao (A.V.M.D. D'Orbigny, 1839) - (OCTOPODIDAE)
- areolatus, Pleurobranchus areolatus O.A.L. Mörch, 1863 - (PLEUROBRANCHIDAE)
- areolatus, Terebra areolatus J.H.F. Link, 1807 - syn of: Oxymeris areolata (J.H.F. Link, 1807) - (TEREBRIDAE)
- areolatus, Anodon areolatus W.J. Swainson, 1829 - syn of: Strophitus undulatus (T. Say, 1817) - (UNIONIDAE)
- areolatus cottoni, Modiolus areolatus cottoni C.F. Laseron, 1956 - (MYTILIDAE)
- areolifera, Alvania areolifera (C.L.F. von Sandberger, 1860 †) - (RISSOIDAE) (FOSSIL)
- areoligera, Atagema areoligera F.D. Abraham, 1877 - syn of: Atagema areolata J. Alder & A. Hancock, 1864 - (DISCODORIDIDAE)
- arepa, Mammilla arepa B.M. Landau & F. Da Silva, 2010 † - (NATICIDAE) (FOSSIL)
- arequipensis, Paranditrigonia arequipensis A.M. Pérez & Reyes, 1983 † - (MEGATRIGONIIDAE) (FOSSIL)
- ares, Alloclionites ares (Mojsisovics, 1893 †) - (STEINMANNITIDAE) (FOSSIL)
- aresca, Corbicula aresca P.M. Pallary, 1909 - syn of: Corbicula fluminalis (O.F. Müller, 1774) - (CYRENIDAE)
- aresca, Crepitacella aresca W.P. Woodring, 1928 † - (RISSOIDAE) (FOSSIL)
- arescum, Microstelma arescum (W.P. Woodring, 1928 †) - (ZEBINIDAE) (FOSSIL)
- aresta, Mangilia aresta W.H. Dall, 1889 - syn of: Theta chariessa (R.B. Watson, 1881) - (MANGELIIDAE)
- aresta, Turbonilla aresta W.H. Dall & P. Bartsch, 1909 - (PYRAMIDELLIDAE)
- Arestoceras, Genus Arestoceras van Hoepen, 1946 (BRANCOCERATIDAE) (FOSSIL)
- Arestoides, syn of: Genus Cypraea C. Linnaeus, 1758 (CYPRAEIDAE)
- Arestorides, Genus Arestorides T. Iredale, 1930 (CYPRAEIDAE)
- arestrum, Epitonium arestrum S.W. Tinker, 1952 - syn of: Epitonium replicatum (G.B. II Sowerby, 1844) - (EPITONIIDAE)
- arestum, Calliostoma arestum W.H. Dall, 1927 - syn of: Calliostoma stirophorum (R.B. Watson, 1879) - (CALLIOSTOMATIDAE)
- arestum, Vexillum arestum H.A. Rehder, 1943 - syn of: Pusia articulatum (L.A. Reeve, 1845) - (COSTELLARIIDAE)
- arestum, Agriopoma arestum (W.H. Dall & C.T. Simpson, 1901) - (VENERIDAE)
- arestum, Meretrix arestum W.H. Dall & C.T. Simpson, 1901 - syn of: Agriopoma arestum (W.H. Dall & C.T. Simpson, 1901) - (VENERIDAE)
- arestus, Aesopus arestus W.H. Dall, 1919 - (COLUMBELLIDAE)
- arestus, Pitar arestus (W.H. Dall & C.T. Simpson, 1901) - (VENERIDAE)
- areta, Propebela areta (P. Bartsch, 1941) - (MANGELIIDAE)
- arethusa, Veprecula arethusa (W.H. Dall, 1918) - (RAPHITOMIDAE)
- arethusa, Pleurotoma arethusa W.H. Dall, 1918 - syn of: Veprecula arethusa (W.H. Dall, 1918) - (TURRIDAE)
- arethusa, Turritella arethusa C.J. Maury, 1930 † - (TURRITELLIDAE) (FOSSIL)
- arethusae, Brasilennea arethusae C.J. Maury, 1935 † - (CERIONIDAE) (FOSSIL)
- arethusae, Pseudamnicola arethusae L. Benoit, 1882 - syn of: Pseudamnicola conovula (G.R. von Frauenfeld, 1863) - (HYDROBIIDAE)
- Aretinula, syn of: Genus Cyclopecten A.E. Verrill, 1897 (PROPEAMUSSIIDAE)
- areyi, Eotomaria areyi A.H. Clarke & Ruedemann, 1903 † - syn of: Stenoloron areyi (A.H. Clarke & Ruedemann, 1903 †) - (EOTOMARIIDAE) (FOSSIL)
- areyi, Stenoloron areyi (A.H. Clarke & Ruedemann, 1903 †) - (GOSSELETINIDAE) (FOSSIL)
- arezela, Condylocardia arezela T. Iredale, 1936 - (CONDYLOCARDIIDAE)
- arfica, Pyrgulina arfica (P. Bartsch, 1915) - (PYRAMIDELLIDAE)
- Arfurtia, Genus Arfurtia Heidelberger, 2001 (GOSSELETINIDAE) (FOSSIL)
- arga, Cerithiopsis arga E.A. Kay, 1979 - (CERITHIOPSIDAE)
- arga, Splendrillia arga J.H. McLean & L.H. Poorman, 1971 - (DRILLIIDAE)
- arga, Marstonia arga F.G. Thompson, 1977 - (HYDROBIIDAE)
- arga, Candidula arga É.A.A. Locard - syn of: Candidula gigaxii (L. Pfeiffer, 1850) - (HYGROMIIDAE)
- argaeicus, Gyraulus argaeicus (R. Sturany, 1904) - (PLANORBIDAE)
- Argalista, Genus Argalista T. Iredale, 1915 (COLLONIIDAE)
- arganica, Candidula arganica (G. Servain, 1880) - (HYGROMIIDAE)
- Arganiella, Genus Arganiella F.L. Giusti & E. Pezzoli, 1984 (HYDROBIIDAE)
- argatussensis, Nathorstites argatussensis Popow, 1946 † - (NATHORSTITIDAE) (FOSSIL)
- argella, Erosaria helvola argella (J.C. Melvill, 1888) - (CYPRAEIDAE)
- argella mascarena, Erosaria helvola argella mascarena (J.C. Melvill, 1888) - (CYPRAEIDAE)
- argelliezi, Partschiceras argelliezi (Reynes, 1868 †) - (PHYLLOCERATIDAE) (FOSSIL)
- Argeneuthria, Genus Argeneuthria Pastorino, 2016 (BUCCINIDAE)
- argentaria, Anomia argentaria Morton, 1833 † - (ANOMIIDAE) (FOSSIL)
- argentaria, Periploma argentaria T.A. Conrad, 1837 - syn of: Periploma planiusculum G.B. I Sowerby, 1834 - (PERIPLOMATIDAE)
- argentaricus, Oxychilus argentaricus F.L. Giusti, 1968 - syn of: Oxychilus majori C.A. Westerlund, 1886 - (OXYCHILIDAE)
- argentarius, Phillipites argentarius Diener, 1905 † - (BEYRICHITIDAE) (FOSSIL)
- argentarius, Ceratites argentarius Smith, 1914 † - syn of: Gymnotoceras rotelliformis (F.B. Meek, 1877 †) - (CERATITIDAE) (FOSSIL)
- argentarolae, Ambigua saxetana argentarolae (M. Paulucci, 1886) - (HELICIDAE)
- argentata, Amphichama argentata (J.T. Kuroda & T. Habe, 1958) - (CHAMIDAE)
- argentata, Monetaria caputserpentis argentata P. Dautzenberg & J.L. Bouge, 1933 - (CYPRAEIDAE)
- argentata, Dimya argentata T. Habe, 1951 - syn of: Neoatreta filipina (P. Bartsch, 1913) - (DIMYIDAE)
- argentata, Margarita argentata A.A. Gould, 1841 - syn of: Margarites argentatus (A.A. Gould, 1841) - (MARGARITIDAE)
- argentata, Cellana argentata G.B. Sowerby, 1839 - syn of: Cellana talcosa (A.A. Gould, 1846) - (NACELLIDAE)
- argentata, Nassarius argentata F.P. Marrat, 1877 - syn of: Nassarius argenteus (F.P. Marrat, 1877) - (NASSARIIDAE)
- argentata, Patella argentata G.B. Sowerby, 1839 - syn of: Cellana talcosa (A.A. Gould, 1846) - (PATELLIDAE)
- argentata, Philine argentata A.A. Gould, 1859 - syn of: Philine orientalis A. Adams, 1854 - (PHILINIDAE)
- argentata, Turbo argentata P.F. Röding, 1798 - syn of: Marmarostoma argyrostomus (C. Linnaeus, 1758) - (TURBINIDAE)
- argentatus, Margarites argentatus (A.A. Gould, 1841) - (MARGARITIDAE)
- argentatus gigantea, Margarites argentatus gigantea W. Leche, 1878 - syn of: Margarites olivaceus (T. Brown, 1827) - (MARGARITIDAE)
- argentaurum, Patella argentaurum R.P. Lesson, 1831 - (PATELLIDAE)
- argentea, Anomia argentea H.C. Küster, 1868 - syn of: Monia patelliformis (C. Linnaeus, 1773) - (ANOMIIDAE)
- argentea, Tenuipteria argentea (T.A. Conrad, 1858 †) - (BAKEVELLIIDAE) (FOSSIL)
- argentea, Cerithiopsis argentea W.H. Dall, 1927 - (CERITHIOPSIDAE)
- argentea, Cotonopsis argentea R.S. Houbrick, 1983 - (COLUMBELLIDAE)
- argentea, Dimya argentea W.H. Dall, 1886 - (DIMYIDAE)
- argentea, Galeomma argentea G.P. Deshayes, 1856 - (GALEOMMATIDAE)
- argentea, Glycymeris argentea E.M. Da Costa, 1778 - syn of: Nucula nucleus (C. Linnaeus, 1758) - (GLYCYMERIDIDAE)
- argentea, Wirenia argentea N.H. Odhner, 1921 - (GYMNOMENIIDAE)
- argentea, Harmogenanina argentea (L.A. Reeve, 1852) - (HELICARIONIDAE)
- argentea, Laternula argentea (L.A. Reeve, 1863) - (LATERNULIDAE)
- argentea, Phacoides argentea L.A. Reeve, 1848 - (LUCINIDAE)
- argentea, Lyonsia argentea J.G. Jeffreys, 1881 - (LYONSIIDAE)
- argentea, Musculus argentea L.A. Reeve, 1858 - syn of: Gregariella coralliophaga (J.F. Gmelin, 1791) - (MYTILIDAE)
- argentea, Nassa argentea F.P. Marrat, 1877 - syn of: Nassarius argenteus (F.P. Marrat, 1877) - (NASSARIIDAE)
- argentea, Cerithiella argentea K.H.J. Thiele, 1925 - (NEWTONIELLIDAE)
- argentea, Nucula argentea E.M. Da Costa, 1777 - syn of: Nucula nucleus (C. Linnaeus, 1758) - (NUCULIDAE)
- argentea, Patella argentea J.F. Gmelin, 1791 - syn of: Cellana radians (J.F. Gmelin, 1791) - (PATELLIDAE)
- argentea, Atrina argentea T.A. Conrad, 1848 † - (PINNIDAE) (FOSSIL)
- argentea, Neaeroporomya argentea (J.B.P.A. Lamarck, 1806 †) - (POROMYIDAE) (FOSSIL)
- argentea, Pteria argentea T.A. Conrad, 1848 † - (PTERIIDAE) (FOSSIL)
- argentea, Pulvinites argentea T.A. Conrad, 1858 † - syn of: Tenuipteria argentea (T.A. Conrad, 1858 †) - (PULVINITIDAE) (FOSSIL)
- argentea, Turbonilla argentea G.B. III Sowerby, 1892 - (PYRAMIDELLIDAE)
- argentea, Alvania argentea (G.B. III Sowerby, 1892) - (RISSOIDAE)
- argentea, Prosopeas argentea J. Henderson, 1898 - (SUBULINIDAE)
- argentea, Anodonta argentea I. Lea, 1840 - syn of: Anodontoides ferussacianus (I. Lea, 1834) - (UNIONIDAE)
- argentea, Macromphalina argentea (P. Bartsch, 1918) - (VANIKORIDAE)
- argentea, Pecchiolia argentea (Mariti 1797) † - (VERTICORDIIDAE) (FOSSIL)
- argentea, Pecchiolia argentea Savi & Meneghini, 1850 † - (VERTICORDIIDAE) (FOSSIL)
- argentea multicostata, Nassa argentea multicostata H. von Maltzan, 1884 - syn of: Nassarius argenteus (F.P. Marrat, 1877) - (NASSARIIDAE)
- argentea mutlicostata, Nassa argentea mutlicostata H. von Maltzan, 1844 - syn of: Nassarius argenteus (F.P. Marrat, 1877) - (NASSARIIDAE)
- argentellei, Josephinella argentellei (W. Kobelt, 1872) - (HELICIDAE)
- argenteolineata, Eolis argenteolineata A. da Costa, 1866 - syn of: Flabellina lineata (S.L. Lovén, 1846) - (AEOLIDIIDAE)
- argenteonitens, Ginebis argenteonitens (C.E. Lischke, 1872) - (CALLIOTROPIDAE)
- argenteonitens, Lischkeia argenteonitens C.E. Lischke, 1872 - syn of: Ginebis argenteonitens (C.E. Lischke, 1872) - (CALLIOTROPIDAE)
- argenteonitens, Trochus argenteonitens C.E. Lischke, 1872 - syn of: Ginebis argenteonitens (C.E. Lischke, 1872) - (TROCHIDAE)
- argenteonitens convexiusculus, Ginebis argenteonitens convexiusculus (M. Yokoyama, 1920) - (CALLIOTROPIDAE)
- argenteonitens convexiusculus tosanum, Ginebis argenteonitens convexiusculus tosanum (T. Shikama, 1962) - (CALLIOTROPIDAE)
- argenteonitens hirasei, Ginebis argenteonitens hirasei Is. Taki & Y. Otuka, 1943 - (CALLIOTROPIDAE)
- argenteum, Chaetoderma argenteum H. Heath, 1911 - (CHAETODERMATIDAE)
- argenteum, Pleurobema oviforme argenteum I. Lea - (UNIONIDAE)
- argenteus, Plekocheilus argenteus F.P. Jousseaume, 1900 - (AMPHIBULIMIDAE)
- argenteus, Calliomphalus argenteus B. Wade, 1926 † - (CALLIOTROPIDAE) (FOSSIL)
- argenteus, Idas argenteus (J.G. Jeffreys, 1876) - (MYTILIDAE)
- argenteus, Lithodomus argenteus L.A. Reeve, 1858 - syn of: Gregariella coralliophaga (J.F. Gmelin, 1791) - (MYTILIDAE)
- argenteus, Nassarius argenteus (F.P. Marrat, 1877) - (NASSARIIDAE)
- argenteus, Delectopecten argenteus F.R. Bernard, 1978 - syn of: Delectopecten vancouverensis (J.J.F. Whiteaves, 1893) - (PECTINIDAE)
- argenteus, Pecten argenteus L.A. Reeve, 1853 - syn of: Antillipecten antillarum (C.A. Récluz, 1853) - (PECTINIDAE)
- argenteus, Pecten argenteus L.A. Reeve, 1853 - syn of: Antillipecten antillarum (C.A. Récluz, 1853) - (PECTINIDAE)
- argenteus, Cyclopecten argenteus F.R. Bernard, 1978 - syn of: Delectopecten vancouverensis (J.J.F. Whiteaves, 1893) - (PROPEAMUSSIIDAE)
- argenteus, Turbo argenteus H.E. Anton, 1839 - syn of: Marmarostoma argyrostomus (C. Linnaeus, 1758) - (TURBINIDAE)
- argenteus lamellosus, Idas argenteus lamellosus A.E. Verrill, 1882 - syn of: Idas lamellosus (A.E. Verrill, 1882) - (MYTILIDAE)
- Argenthina, Genus Argenthina Herbert & Del Rio, 2005 (MURICIDAE) (FOSSIL)
- argentia, Strophiops argentia C.J. Maynard, 1913 - (CERIONIDAE)
- Argenticyprina, Genus Argenticyprina Lazo & Damborenea, 2011 (ISOCYPRINIDAE) (FOSSIL)
- argentimaculatus, Favorinus argentimaculatus Subba Rao, 1967 - (FACELINIDAE)
- argentina, Neactaeonina argentina D.G. Zelaya, Schejter & C.F. Ituarte, 2011 - (ACTEONIDAE)
- argentina, Eriphyla argentina Burckhardt, 1907 † - (ASTARTIDAE) (FOSSIL)
- argentina, Prodoris argentina P. Kaiser, 1980 - syn of: Prodoris clavigera (K.H.J. Thiele, 1912) - (BATHYDORIDIDAE)
- argentina, Crepidula argentina L.R.L. Simone, G. Pastorino & P.E. Penchaszadeh, 2000 - (CALYPTRAEIDAE)
- argentina, Temesa argentina (M.I. Hylton-Scott, 1954) - (CLAUSILIIDAE)
- argentina, Epiphragmophora argentina E.L. Holmberg - (EPIPHRAGMOPHORIDAE)
- argentina, Austroneilsonia argentina Sabattini, 1975 † - (GOSSELETINIDAE) (FOSSIL)
- argentina, Mathilda argentina Z.J.A. De Castellanos, 1990 - (MATHILDIDAE)
- argentina, Botula argentina (G.P. Deshayes, 1823 †) - (MYTILIDAE) (FOSSIL)
- argentina, Philine argentina A. Carcelles, 1947 - (PHILINIDAE)
- argentina, Turbonilla argentina (M. Doello-Jurado, 1938) - (PYRAMIDELLIDAE)
- argentina, Brookula argentina (D.G. Zelaya, R.S. Absalão & A. Pimenta, 2006) - (SEGUENZIOIDEA (UNASSIGNED))
- argentina, Benthobrookula argentina D.G. Zelaya, R.S. Absalão & A. Pimenta, 2006 - syn of: Brookula argentina (D.G. Zelaya, R.S. Absalão & A. Pimenta, 2006) - (SEGUENZIOIDEA (unassigned))
- argentina, Macromphalina argentina Z.J.A. De Castellanos, 1975 - (VANIKORIDAE)
- argentina, Leukoma argentina (H.F.A. von Ihering, 1897 †) - (VENERIDAE) (FOSSIL)
- argentina, Tivela argentina (G.B. I Sowerby, 1835) - (VENERIDAE)
- argentina, Periglypta argentina G.B. I Sowerby, 1835 - syn of: Tivela argentina (G.B. I Sowerby, 1835) - (VENERIDAE)
- argentinae, Anatoma argentinae (D.G. Zelaya & D.L. Geiger, 2007) - (ANATOMIDAE)
- argentinae, Limea argentinae J.A. Allen, 2004 - (LIMIDAE)
- argentinae, Euciphoceras argentinae Dzik & Gazdzicki, 2001 † - (NAUTILIDAE) (FOSSIL)
- argentinae, Ledella argentinae J.A. Allen & G. Hannah, 1989 - (NUCULANIDAE)
- argentinae, Trenchia argentinae (A.H. Clarke, 1961) - (SEGUENZIOIDEA (UNASSIGNED))
- argentinense, Hatchericeras argentinense Stanton, 1901 † - syn of: Hatchericeras patagonense Stanton, 1901 † - (NEOCOMITIDAE) (FOSSIL)
- argentinensis, Eatoniella argentinensis Z.J.A. De Castellanos & C. Fernández, 1972 - (EATONIELLIDAE)
- argentinensis, Stutchburia argentinensis Harrington, 1955 † - syn of: Myonia argentinensis (Harrington, 1955 †) - (KALENTERIDAE) (FOSSIL)
- argentinensis, Chlamys argentinensis Z.J.A. De Castellanos, 1973 - (PECTINIDAE)
- argentinensis, Plawenia argentinensis A.H. Scheltema & C.F.C. Schander, 2000 - (SIMROTHIELLIDAE)
- argentinensis, Myonia argentinensis (Harrington, 1955 †) - (VACUNELLIDAE) (FOSSIL)
- argentinensis, Yoldiella argentinensis J.A. Allen, A. Sanders & G. Hannah, 1995 - (YOLDIIDAE)
- Argentiniceras, Genus Argentiniceras Spath, 1924 (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- argentinum, Sphaerium argentinum (A.V.M.D. D'Orbigny, 1835) - (SPHAERIIDAE)
- argentinus, Bulimulus argentinus C.M.F. Ancey, 1901 - syn of: Rhinus argentinus (C.M.F. Ancey, 1901) - (BULIMULIDAE)
- argentinus, Stenozone argentinus (Reed, 1927 †) - (GOSSELETINIDAE) (FOSSIL)
- argentinus, Glabrocingulum argentinus Reed, 1927 † - syn of: Stenozone argentinus (Reed, 1927 †) - (GOSSELETINIDAE) (FOSSIL)
- argentinus, Illex argentinus (Z.J.A. De Castellanos, 1960) - (OMMASTREPHIDAE)
- argentinus, Pseudotoites argentinus Arkell, 1954 † - (OTOITIDAE) (FOSSIL)
- argentinus, Proconulus argentinus Ferrari, 2014 † - (PROCONULIDAE) (FOSSIL)
- argentinus, Ischnopupoides cordatus argentinus W.K. Weyrauch, 1964 - (PUPILLIDAE)
- argentinus, Rhinus argentinus (C.M.F. Ancey, 1901) - (SIMPULOPSIDAE)
- Argentoscaphites, Genus Argentoscaphites Blasco de Nullo, Nullo & Proserpio, 1981 (LYTOCERATIDAE) (FOSSIL)
- Argentovoluta, Genus Argentovoluta J. Vazquez & C.H. Caldini, 1989 (VOLUTIDAE)
- argentum, Calliostoma argentum J.F. Quinn, 1992 - (CALLIOSTOMATIDAE)
- argenvillea, Arca argenvillea A. Risso, 1826 - syn of: Arca tetragona Poli, 1795 - (ARCIDAE)
- argenvillei, Pythia argenvillei L. Pfeiffer, 1853 - syn of: Pythia scarabaeus (C. Linnaeus, 1758) - (ELLOBIIDAE)
- argenvillei, Scutellastra argenvillei (C.F.F. von Krauss, 1848) - (PATELLIDAE)
- argenvillei, Patella argenvillei C.F.F. von Krauss, 1848 - syn of: Scutellastra argenvillei (C.F.F. von Krauss, 1848) - (PATELLIDAE)
- argenvillei, Patella argenvillei W.H. Turton, 1932 - syn of: Scutellastra granularis (C. Linnaeus, 1758) - (PATELLIDAE)
- argenvillii, Hastula argenvillii G.P. Deshayes, 1859 - syn of: Hastula strigilata (C. Linnaeus, 1758) - (TEREBRIDAE)
- argesiensis, Viviparus argesiensis (Stefanescu, 1896 †) - (VIVIPARIDAE) (FOSSIL)
- argeta, Xanthodaphne argeta (W.H. Dall, 1890) - (RAPHITOMIDAE)
- argia, Sphincterochila argia (J.R. Bourguignat, 1859) - (SPHINCTEROCHILIDAE)
- argilacea, Austrochloritis argilacea (A.E.J. Férussac, 1821) - (CAMAENIDAE)
- argilacea, Helix argilacea A.E.J. Férussac, 1821 - syn of: Austrochloritis argilacea (A.E.J. Férussac, 1821) - (HELICIDAE)
- argillacea, Venericyprina argillacea Casey 1952 † - (ARCTICIDAE) (FOSSIL)
- argillacea, Chloritis argillacea (A.E.J. Férussac, 1821) - (CAMAENIDAE)
- argillacea, Etrema argillacea (R.B. Hinds, 1843) - (CLATHURELLIDAE)
- argillacea, Perna argillacea A.A. Gould, 1850 - syn of: Isognomon ephippium (C. Linnaeus, 1758) - (MYTILIDAE)
- argillacea, Natica argillacea Wrigley † - (NATICIDAE) (FOSSIL)
- argillacea newtoni, Chloritis argillacea newtoni (A. Nobre, 1937) - (CAMAENIDAE)
- argillaceum, Buccinum argillaceum A.N. Golikov & V.V. Gulbin, 1977 - (BUCCINIDAE)
- argillaceus, Conus argillaceus G. Perry, 1811 - syn of: Strategoconus splendidulus (G.B. I Sowerby, 1833) - (CONIDAE)
- argillarum, Passaloteuthis argillarum H.G. Lang, 1928 † - (PASSALOTEUTHIDIDAE) (FOSSIL)
- argillensis, Pecten argillensis T.A. Conrad, 1860 † - (PECTINIDAE) (FOSSIL)
- argillensis, Alvania argillensis P. Lozouet, 1998 † - (RISSOIDAE) (FOSSIL)
- argillicola, Conus argillicola Eichwald, 1830 † - (CONIDAE) (FOSSIL)
- Argina, syn of: Genus Lunarca J.E. Gray, 1842 (ARCIDAE)
- Arginarca, syn of: Genus Lunarca J.E. Gray, 1842 (ARCIDAE)
- Arginella, Genus Arginella MacNeil, 1938 (NOETIIDAE) (FOSSIL)
- Arginopsis, Genus Arginopsis MacNeil, 1938 (NOETIIDAE) (FOSSIL)
- argintarius, Troglovitrea argintarius (A. Negrea & F. Riedel, 1963) - (PRISTILOMATIDAE)
- argintarui, Troglovitrea argintarui A. Negrea & F. Riedel, 1968 - (PRISTILOMATIDAE)
- Arginula, Genus Arginula K.V.W. Palmer, 1937 (FISSURELLIDAE)
- argiolus, Mauritia argiolus P.F. Röding, 1798 - syn of: Mauritia scurra indica (J.F. Gmelin, 1791) - (CYPRAEIDAE)
- argiphrix, Autocoptis argiphrix F.G. Thompson & C.J. Franz, 1976 - (UROCOPTIDAE)
- argis, Tellina argis A.A. Olsson, 1971 - syn of: Tellina zacae (L.G. Hertlein & A.M. Strong, 1949) - (TELLINIDAE)
- Argna, Genus Argna A.E.M. Cossmann, 1889 (ARGNIDAE)
- ARGNIDAE Hudec, 1965 - Family (GASTROPODA-HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-PUPILLOIDEA [Superfamily])
- argo, Argonauta argo C. Linnaeus, 1758 - (ARGONAUTIDAE)
- argo, Joleaudella argo (Billings, 1860 †) - (BELLEROPHONTIDAE) (FOSSIL)
- argo, Nipponaphera argo P. Bouchet & R.E. Petit, 2008 - (CANCELLARIIDAE)
- argo, Dendrodoris argo J.F. Meckel, 1808 - syn of: Dendrodoris limbata (G.L.C.F.D. Cuvier, 1804) - (DENDRODORIDIDAE)
- argo, Platydoris argo (C. Linnaeus, 1767) - (DISCODORIDIDAE)
- argo, Platydoris argo T. Pennant, 1777 - syn of: Platydoris argo (C. Linnaeus, 1767) - (DISCODORIDIDAE)
- argo, Murex argo W.J. Clench & I. Pérez Farfante, 1945 - syn of: Chicoreus spectrum (L.A. Reeve, 1846) - (MURICIDAE)
- argo, Chicoreus argo W.J. Clench & Farfante, 1945 - syn of: Chicoreus spectrum (L.A. Reeve, 1846) - (MURICIDAE)
- argo, Myophorella argo Crickmay, 1930 † - (MYOPHORELLIDAE) (FOSSIL)
- argo, Platyceras argo J.W. Hall, 1862 † - (PLATYCERATIDAE) (FOSSIL)
- argo, Tropidodiscus argo Billings, 1860 † - syn of: Johnmartinia orbicularis (R. Tate, 1896 †) - (TROPIDODISCIDAE) (FOSSIL)
- argo agglutinans, Argonauta argo agglutinans E.C. Von Martens, 1867 - syn of: Argonauta argo C. Linnaeus, 1758 - (ARGONAUTIDAE)
- argo americana, Argonauta argo americana W.H. Dall, 1889 - syn of: Argonauta argo C. Linnaeus, 1758 - (ARGONAUTIDAE)
- argo aurita, Argonauta argo aurita E.C. Von Martens, 1867 - syn of: Argonauta argo C. Linnaeus, 1758 - (ARGONAUTIDAE)
- argo cornuta, Argonauta argo cornuta T.A. Conrad, 1854 - syn of: Argonauta cornutus T.A. Conrad, 1854 - (ARGONAUTIDAE)
- argo cygnus, Argonauta argo cygnus T.A. de M. Monterosato, 1913 - (ARGONAUTIDAE)
- argo mediterranea, Argonauta argo mediterranea T.A. de M. Monterosato, 1914 - syn of: Argonauta argo C. Linnaeus, 1758 - (ARGONAUTIDAE)
- argo obtusangula, Argonauta argo obtusangula E.C. Von Martens, 1867 - syn of: Argonauta argo C. Linnaeus, 1758 - (ARGONAUTIDAE)
- argobbae, Aspidoceras argobbae Dacque, 1905 † - (ASPIDOCERATIDAE) (FOSSIL)
- argoblysis, Roxania argoblysis (H.A. Rehder & H.S. Ladd, 1973) - (SCAPHANDRIDAE)
- argoblysis, Leucophysema argoblysis H.A. Rehder & H.S. Ladd, 1973 - syn of: Roxania argoblysis (H.A. Rehder & H.S. Ladd, 1973) - (SCAPHANDRIDAE)
- argobuccinum, Tritonium argobuccinum P.F. Röding, 1798 - syn of: Argobuccinum pustulosum (J. Lightfoot, 1786) - (BUCCINIDAE)
- Argobuccinum, Genus Argobuccinum Herrmannsen, 1846 (RANELLIDAE)
- Argocheilus, Genus Argocheilus Shimanskiy, 1961 (POTERIOCERATIDAE) (FOSSIL)
- Argoderma, syn of: Genus Pecten H.P.C. Mψller, 1776 (PECTINIDAE)
- Argodesma, syn of: Genus Pecten H.P.C. Mψller, 1776 (PECTINIDAE)
- argolica, Tsoukatosia argolica A. Reischütz, P.L. Reischütz & Szekeres, 2016 - (CLAUSILIIDAE)
- argolica, Vitrea argolica F. Riedel, 1962 - (PRISTILOMATIDAE)
- argolis, Catazone argolis J. Perner, 1907 † - (MURCHISONIIDAE) (FOSSIL)
- Argolites, Genus Argolites Renz , 1939 (TRACHYCERATIDAE) (FOSSIL)
- argonauta, Spirolaxis argonauta R. Bieler, 1993 - (ARCHITECTONICIDAE)
- Argonauta, Genus Argonauta C. Linnaeus, 1758 (ARGONAUTIDAE)
- argonauta, Dentimargo argonauta J. Espinosa & J.A. Ortea, 2002 - (MARGINELLIDAE)
- argonautae, Ocythoe argonautae G.L.C.F.D. Cuvier, 1829 - syn of: Argonauta argo C. Linnaeus, 1758 - (OCYTHOIDAE)
- argonautarum, Helix argonautarum W.A. Lindholm, 1922 - syn of: Jasonella mingrelica (P. Hesse, 1921) - (HELICIDAE)
- argonautarum, Caucasotachea argonautarum Roschkovski, 1919 - syn of: Caucasotachea atrolabiata (I. Krynicki, 1833) - (HELICIDAE)
- argonautarum, Argonauticeras argonautarum (Anderson, 1902 †) - (TETRAGONITIDAE) (FOSSIL)
- argonautica, Cypraea argonautica F.M. Anderson, 1958 † - (CYPRAEIDAE) (FOSSIL)
- Argonauticeras, Genus Argonauticeras Anderson, 1938 (TETRAGONITIDAE) (FOSSIL)
- argonauticum, Beudanticeras argonauticum Anderson, 1958 † - (DESMOCERATIDAE) (FOSSIL)
- ARGONAUTIDAE Tryon, 1879 - Family (CEPHALOPODA-COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-OCTOPODA [Order]-INCIRRATA [Suborder]-ARGONAUTOIDEA [Superfamily])
- argonautiformis, Stoliczkaia argonautiformis (F. Stoliczka, 1864 †) - (LYELLICERATIDAE) (FOSSIL)
- argonautula, Xerotricha argonautula P.B. Webb & S. Berthelot, 1833 - syn of: Xerotricha arguineguinensis (M. Seddon & M.T. Aparicio, 1998) - (HYGROMIIDAE)
- argonautula, Albea argonautula (P.B. Webb & S. Berthelot, 1833) - (SPHINCTEROCHILIDAE)
- Argonerita, Subgenus Nerita (Argonerita) M.A. Frey & G.J. Vermeij, 2008 (NERITIDAE)
- Argopecten, Genus Argopecten T.A. de M. Monterosato, 1889 (PECTINIDAE)
- argosensis, Bulla argosensis M. Harzhauser, 2007 † - (BULLIDAE) (FOSSIL)
- argosensis, Sabaudiella argosensis Vasicek & Hoedemaeker, 2003 † - (LEPTOCERATOIDIDAE) (FOSSIL)
- Argosirenites, Genus Argosirenites Popov, 1961 (TRACHYCERATIDAE) (FOSSIL)
- argosyia, Terebra argosyia A.A. Olsson, 1971 - (TEREBRIDAE)
- argoti, Subpulchellia argoti J.J. Vermeulen, 1997 † - (PULCHELLIIDAE) (FOSSIL)
- argoviana, Rhopaloteuthis argoviana H.M.D. de Blainville, 1808 † - syn of: Belemnopsis hastata (H.M.D. de Blainville, 1808 †) - (DUVALIIDAE) (FOSSIL)
- argovianus, Belemnites argovianus C. Mayer, 1863 † - syn of: Belemnopsis hastata (H.M.D. de Blainville, 1808 †) - (BELEMNITELLIDAE) (FOSSIL)
- argoviense, Taramelliceras argoviense Jeannet, 1951 † - (OPPELIIDAE) (FOSSIL)
- argoviensis, Peltoraspailites argoviensis Jeannet, 1951 † - (ASPIDOCERATIDAE) (FOSSIL)
- argoviensis, Nautilus argoviensis von Loesch, 1914 † - syn of: Pseudaganides argoviensis (von Loesch, 1914 †) - (NAUTILIDAE) (FOSSIL)
- argoviensis, Canaliculites argoviensis Jeannet, 1951 † - (OPPELIIDAE) (FOSSIL)
- argoviensis, Erymnocerites argoviensis Jeannet, 1951 † - (PACHYCERATIDAE) (FOSSIL)
- argoviensis, Pseudaganides argoviensis (von Loesch, 1914 †) - (PSEUDONAUTILIDAE) (FOSSIL)
- argoviensis, Kellawaysites argoviensis Jeannet, 1951 † - (REINECKEIIDAE) (FOSSIL)
- argrantesta, Lottia argrantesta Simison & D.R. Lindberg, 2003 - (LOTTIIDAE)
- arguineguinensis, Monilearia arguineguinensis (M. Seddon & M.T. Aparicio, 1998) - (COCHLICELLIDAE)
- arguineguinensis, Helix arguineguinensis M. Seddon & M.T. Aparicio, 1998 - syn of: Xerotricha arguineguinensis (M. Seddon & M.T. Aparicio, 1998) - (HELICIDAE)
- arguineguinensis, Xerotricha arguineguinensis (M. Seddon & M.T. Aparicio, 1998) - (HYGROMIIDAE)
- Arguniella, Genus Arguniella Kolesnikov, 1980 (FERGANOCONCHIDAE) (FOSSIL)
- argus, Australiceras argus F.M. Anderson, 1938 † - (ANCYLOCERATIDAE) (FOSSIL)
- argus, Aplysia argus W.P.E.S. Rüppell & F.S. Leuckart, 1828 - (APLYSIIDAE)
- argus, Mitrella argus D'Orbigny, 1842 - syn of: Mitrella dichroa (G.B. I Sowerby, 1844) - (COLUMBELLIDAE)
- argus, Arestorides argus (C. Linnaeus, 1758) - (CYPRAEIDAE)
- argus, Talparia argus C. Linnaeus, 1758 - syn of: Arestorides argus (C. Linnaeus, 1758) - (CYPRAEIDAE)
- argus, Lyncina argus C. Linnaeus, 1758 - syn of: Arestorides argus (C. Linnaeus, 1758) - (CYPRAEIDAE)
- argus, Platydoris argus J.B. Bohadsch, 1761 - syn of: Platydoris argo (C. Linnaeus, 1767) - (DISCODORIDIDAE)
- Argus, syn of: Genus Discodoris L.S.R. Bergh, 1877 (DISCODORIDIDAE)
- argus, Eremariontoides argus (H.M. Edson, 1912) - (HELMINTHOGLYPTIDAE)
- argus, Lolliguncula argus T.F. Brakoniecki & C.F.E. Roper, 1985 - (LOLIGINIDAE)
- argus, Pseudomiltha argus (Melleville, 1843 †) - (LUCINIDAE) (FOSSIL)
- argus, Murex argus J.F. Gmelin, 1791 - syn of: Argobuccinum pustulosum (J. Lightfoot, 1786) - (MURICIDAE)
- argus, Natica argus E.A.L. Kittl, 1892 † - (NATICIDAE) (FOSSIL)
- argus, Nerita argus C.A. Récluz, 1841 - (NERITIDAE)
- argus, Octopus argus C.F.F. von Krauss, 1848 - (OCTOPODIDAE)
- Argus, syn of: Genus Pecten H.P.C. Mψller, 1776 (PECTINIDAE)
- argus, Argobuccinum argus J.F. Gmelin, 1791 - syn of: Argobuccinum pustulosum (J. Lightfoot, 1786) - (RANELLIDAE)
- argus, Anabarella argus Bengtson & al., 1990 † - syn of: Anabarella australis Bengtson & al., 1990 † - (STENOTHECIDAE) (FOSSIL)
- argus, Terebra argus R.B. Hinds, 1844 - (TEREBRIDAE)
- argus brachygyra, Terebra argus brachygyra H.A. Pilsbry, 1921 - (TEREBRIDAE)
- argus contrastriata, Arestorides argus contrastriata (G. Perry, 1811) - (CYPRAEIDAE)
- argus contrastriata rariocellata, Arestorides argus contrastriata rariocellata (L. Raybaudi Massilia) - (CYPRAEIDAE)
- argus ventricosa, Arestorides argus ventricosa (J.E. Gray, 1824) - (CYPRAEIDAE)
- argusculus, Erosaria argusculus J.S. Schröter, 1804 - syn of: Erosaria helvola (C. Linnaeus, 1758) - (CYPRAEIDAE)
- arguta, Mazatlania arguta A.A. Gould, 1853 - syn of: Mazatlania fulgurata (R.A. Philippi, 1846) - (COLUMBELLIDAE)
- arguta, Helcionella arguta Resser, 1939 † - syn of: Dorispira arguta (Resser, 1939 †) - (HELCIONELLIDAE) (FOSSIL)
- arguta, Modiolopsis arguta Ulrich, 1894 † - (MODIOMORPHIDAE) (FOSSIL)
- arguta, Vebericochlis arguta Licharev, 1975 † - (MURCHISONIIDAE) (FOSSIL)
- arguta, Hypergonia arguta J. Donald 1892 † - (ORTHONEMIDAE) (FOSSIL)
- arguta, Partula arguta W.H. Pease, 1866 - (PARTULIDAE)
- arguta, Juannularia arguta (L. Pfeiffer, 1858) - (POMATIIDAE)
- arguta, Microschiza arguta Böhm, 1895 † - (PSEUDOMELANIIDAE) (FOSSIL)
- arguta, Pyrgulina arguta Peñas & Rolán, 2017 - (PYRAMIDELLIDAE)
- arguta, Sassia arguta (D.C. Solander, 1766 †) - (RANELLIDAE) (FOSSIL)
- arguta, Alvania arguta É.A.A. Locard & E. Caziot, 1900 - (RISSOIDAE)
- arguta, Dorispira arguta (Resser, 1939 †) - (RUGAECONIDAE) (FOSSIL)
- arguta, Riebeckia arguta (E.C. Von Martens, 1881) - (SUBULINIDAE)
- arguta, Terebra arguta A.A. Gould, 1853 - syn of: Mazatlania fulgurata (R.A. Philippi, 1846) - (TEREBRIDAE)
- arguta insularis, Juannularia arguta insularis (C. de la Torre & P. Bartsch, 1941) - (POMATIIDAE)
- arguta perplicata, Juannularia arguta perplicata (J. Gundlach, 1857) - (POMATIIDAE)
- Argutarpites, syn of: Genus Protogrammoceras Dubar, 1978 (HILDOCERATIDAE) (FOSSIL)
- argutecostata, Scissurella argutecostata G. Seguenza, 1877 - syn of: Anatoma tenuisculpta (G. Seguenza, 1880) - (SCISSURELLIDAE)
- Argutostrea, Genus Argutostrea Kosenko, 2016 (GRYPHAEIDAE) (FOSSIL)
- argutum, Gladiocerithium argutum T.A. de M. Monterosato, 1911 - syn of: Cerithium protractum Ant. Bivona-Bernardi in And. Bivona-Bernardi, 1838 - (CERITHIIDAE)
- argutum barashi, Cerithium argutum barashi F. Nordsieck, 1974 - syn of: Cerithium scabridum R.A. Philippi, 1848 - (CERITHIIDAE)
- argutus, Philoxene argutus Fenton & Fenton, 1924 † - (EUOMPHALIDAE) (FOSSIL)
- argutus, Fusus argutus Clark, 1895 † - (FASCIOLARIIDAE) (FOSSIL)
- argutus, Protogrammoceras argutus Buckman, 1923 † - syn of: Protogrammoceras kurrianum (Oppel, 1862 †) - (HILDOCERATIDAE) (FOSSIL)
- argutus, Leptopeas argutus (H.A. Pilsbry, 1906) - (SUBULINIDAE)
- Argvethites, Subgenus Heteroceras (Argvethites) Collignon, 1962 (HETEROCERATIDAE) (FOSSIL)
- argyna, Murex argyna O.A.L. Mörch, 1852 - syn of: Chicoreus palmarosae (J.B.P.A. Lamarck, 1822) - (MURICIDAE)
- argynnis, Albinaria argynnis (C.A. Westerlund, 1898) - (CLAUSILIIDAE)
- argynnis angulipoma, Albinaria argynnis angulipoma H. Nordsieck, 2007 - (CLAUSILIIDAE)
- argynnis exaggerata, Albinaria argynnis exaggerata H. Nordsieck, 2007 - (CLAUSILIIDAE)
- argynnis geraniensis, Albinaria argynnis geraniensis E. Neubert, 1998 - (CLAUSILIIDAE)
- argynnis levipalatalis, Albinaria argynnis levipalatalis E. Gittenberger, 1994 - (CLAUSILIIDAE)
- argynnis profundella, Albinaria argynnis profundella E. Gittenberger, 1994 - (CLAUSILIIDAE)
- argyritis, Anomia argyritis L.A. Reeve, 1859 - syn of: Anomia achaeus Gray, 1849 - (ANOMIIDAE)
- Argyrobessa, Genus Argyrobessa Vermeij & Vokes, 1997 (NEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- Argyrodonax, Genus Argyrodonax W.H. Dall, 1911 (SEMELIDAE)
- Argyromya, Genus Argyromya P. Fischer, 1887 (PHOLADOMYIDAE) (FOSSIL)
- Argyropeza, Genus Argyropeza J.C. Melvill & R. Standen, 1901 (CERITHIIDAE)
- argyrostoma, Tegula argyrostoma (J.F. Gmelin, 1791) - (TEGULIDAE)
- argyrostoma basilirata, Tegula argyrostoma basilirata H.A. Pilsbry, 1901 - (TEGULIDAE)
- argyrostoma sublaevis, Tegula argyrostoma sublaevis (H.A. Pilsbry, 1904) - (TEGULIDAE)
- argyrostoma turbinata, Tegula argyrostoma turbinata (A. Adams, 1853) - (TEGULIDAE)
- argyrostomus, Marmarostoma argyrostomus (C. Linnaeus, 1758) - (TURBINIDAE)
- argyrostomus, Turbo argyrostomus C. Linnaeus, 1758 - syn of: Marmarostoma argyrostomus (C. Linnaeus, 1758) - (TURBINIDAE)
- argyrostomus carduus, Turbo argyrostomus carduus P. Fischer in L.C. Kiener, 1873 - syn of: Marmarostoma argyrostomus (C. Linnaeus, 1758) - (TURBINIDAE)
- argyrostomus lajonkairii, Turbo argyrostomus lajonkairii G.P. Deshayes, 1839 - syn of: Turbo lajonkairii G.P. Deshayes, 1839 - (TURBINIDAE)
- argyrostomus perspeciosus, Marmarostoma argyrostomus perspeciosus (T. Iredale, 1929) - (TURBINIDAE)
- argyrostomus sandwicensis, Turbo argyrostomus sandwicensis W.H. Pease, 1861 - syn of: Turbo sandwicensis W.H. Pease, 1861 - (TURBINIDAE)
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