- Alcadia, Genus Alcadia J.E. Gray, 1840 (HELICINIDAE)
- alcalalensis, Planorbarius alcalalensis P. Jodot, 1958 - (PLANORBIDAE)
- alcaldei, Cerion alcaldei C.G. Aguayo & M.I. Sánchez Roig, 1953 - (CERIONIDAE)
- alcaldei, Melaniella alcaldei C.G. Aguayo & M.L. Jaume, 1954 - (OLEACINIDAE)
- alcaldei, Chondrothyrium alcaldei M.L. Jaume & Sánchez De Fuentes, 1943 - (POMATIIDAE)
- alcaldei, Annularisca holguinensis alcaldei C.G. Aguayo & M.I. Sánchez Roig, 1949 - (POMATIIDAE)
- alcaldei, Cryptelasmus alcaldei M.L. Jaume & Sánchez De Fuentes, 1943 - (SUBULINIDAE)
- alcaldei, Schindewolfoceras alcaldei Montesinos & A. Henn, 1986 † - (TRIAINOCERATIDAE) (FOSSIL)
- alcaldei, Cochlodinella alcaldei C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- alcamoensis, Siciliaria septemplicata alcamoensis R.A.M. Brandt, 1961 - (CLAUSILIIDAE)
- alcantarae, Bulimus alcantarae A.C. Bernardi, 1853 - syn of: Drymaeus dombeyanus (L. Pfeiffer, 1846) - (BULIMULIDAE)
- alcarazanus, Iberus marmoratus alcarazanus (A. Guirao, 1854) - (HELICIDAE)
- alcazari, Costoanachis alcazari Ortea & Espinosa, 2017 - (COLUMBELLIDAE)
- alcesense, Eutrephoceras alcesense Reeside, 1927 † - (NAUTILIDAE) (FOSSIL)
- alcesiana, Protocardia alcesiana McLearn, 1933 † - (CARDIIDAE) (FOSSIL)
- alcesianus, Pecten alcesianus McLearn, 1933 † - (PECTINIDAE) (FOSSIL)
- alceste, Metoptoma alceste Billings, 1865 † - (METOPTOMATIDAE) (FOSSIL)
- alceste, Coelocaulus alceste J. Perner, 1907 † - (MURCHISONIIDAE) (FOSSIL)
- alcestis, Compsodrillia alcestis (W.H. Dall, 1919) - (PSEUDOMELATOMIDAE)
- alcestis, Austrodaphnella alcestis (J.C. Melvill, 1906) - (RAPHITOMIDAE)
- Alcetryonia, syn of: Subgenus Ostrea (Alectryonia) Fischer de Waldheim, 1807 † (OSTREIDAE) (FOSSIL)
- alchymista, Dentimargo alchymista (J.C. Melvill & R. Standen, 1903) - (MARGINELLIDAE)
- alcida, Nebularia alcida C.N. Cate, 1963 - syn of: Nebularia luctuosa A. Adams, 1853 - (MITRIDAE)
- alcida, Turritella alcida W.H. Dall, 1898 † - (TURRITELLIDAE) (FOSSIL)
- Alcidellus, Subgenus Oxycerites (Alcidellus) de Grossouvre, 1888 † (OPPELIIDAE) (FOSSIL)
- Alcidia, syn of: Genus Alvania A. Risso, 1826 (RISSOIDAE)
- Alcidia, syn of: Genus Streptaxis J.E. Gray, 1837 (STREPTAXIDAE)
- alcidiana, Systrophia alcidiana C.M.F. Ancey, 1892 - (SCOLODONTIDAE)
- Alcidiella, syn of: Genus Alvania A. Risso, 1826 (RISSOIDAE)
- alcima, Cerithiopsidella alcima (P. Bartsch, 1911) - (CERITHIOPSIDAE)
- alcimus, Fusinus alcimus (W.H. Dall, 1889) - (FASCIOLARIIDAE)
- alcimus, Phrontis alcimus J.C. Melvill, 1918 - syn of: Nassarius delicatus (A. Adams, 1852) - (NASSARIIDAE)
- alcimus, Petaloconchus sculpturatus alcimus W.C. Mansfield, 1925 - (VERMETIDAE)
- alcimus rushii, Fusus alcimus rushii W.H. Dall, 1889 - syn of: Fusinus rushii (W.H. Dall, 1889) - (FASCIOLARIIDAE)
- alcinoe, Arietites alcinoe (Reynès, 1879 †) - (ARIETITIDAE) (FOSSIL)
- alciope, Thracia alciope G.F. Angas, 1872 - syn of: Thracia imperfecta (J.B.P.A. Lamarck, 1818) - (THRACIIDAE)
- alcippe, Agathotoma alcippe (W.H. Dall, 1918) - (MANGELIIDAE)
- Alcira, Genus Alcira H. Adams, 1860 (COLUMBELLIDAE)
- Alcithoe, Genus Alcithoe H. Adams & A. Adams, 1853 (VOLUTIDAE)
- alcmena, Turbonilla alcmena P. Bartsch, 1955 - syn of: Turbonilla levis Adams, 1850 - (PYRAMIDELLIDAE)
- alcmene, Calliclava alcmene (W.H. Dall, 1919) - (DRILLIIDAE)
- alcoaensis, Belgrandia alcoaensis C.R. Böttger, 1963 - (HYDROBIIDAE)
- alcobacensis, Solaropsis alcobacensis R.B. Salvador & L.R.L. Simone, 2015 - (PLEURODONTIDAE)
- alcocki, Ancilla alcocki E.A. Smith, 1906 - (ANCILLARIIDAE)
- alcocki, Galeodea alcocki (E.A. Smith, 1906) - (CASSIDAE)
- alcocki, Oocorys alcocki E.A. Smith, 1906 - syn of: Galeodea alcocki (E.A. Smith, 1906) - (CASSIDAE)
- alcocki, Potamocorbula alcocki H.B. Preston, 1907 - syn of: Potamocorbula abbreviata (H.B. Preston, 1907) - (CORBULIDAE)
- alcocki, Corbula alcocki H.B. Preston, 1907 - syn of: Potamocorbula abbreviata (H.B. Preston, 1907) - (CORBULIDAE)
- alcocki, Cardiomya alcocki (E.A. Smith, 1894) - (CUSPIDARIIDAE)
- alcocki, Nucula alcocki Noetling, 1895 † - (NUCULIDAE) (FOSSIL)
- alcocki, Teretoctopus alcocki C.W. Robson, 1932 - (OCTOPODIDAE)
- alcocki, Delectopecten alcocki (E.A. Smith, 1904) - (PECTINIDAE)
- alcocki, Propeamussium alcocki (E.A. Smith, 1894) - (PROPEAMUSSIIDAE)
- alcocki fortisculpta, Cardiomya alcocki fortisculpta J.T. Kuroda, 1948 - syn of: Cardiomya fortisculpta J.T. Kuroda, 1948 - (CUSPIDARIIDAE)
- alcoladoi, Volvarina alcoladoi J. Espinosa & J.A. Ortea, 1998 - (MARGINELLIDAE)
- Alcolytoceras, syn of: Genus Alocolytoceras Pompeckj, 1896 † (LYTOCERATIDAE) (FOSSIL)
- Alconatica, Subgenus Natica (Alconatica) T. Shikama, 1971 (NATICIDAE)
- alconnelli, Kioconus alconnelli (A.J. Da Motta, 1986) - (CONIDAE)
- Alcospira, syn of: Subgenus Amalda (Alocospira) A.E.M. Cossmann, 1899 (ANCILLARIIDAE)
- Alcospira, syn of: Subgenus Amalda (Alocospira) A.E.M. Cossmann, 1899 (ANCILLARIIDAE)
- alcoviensis, Somatogyrus alcoviensis K.A. Krieger, 1972 - (LITHOGLYPHIDAE)
- Alcyna, Genus Alcyna S.T. Williams, J. Donald, C. Spencer & T. Nakano, 2010 (TROCHIDAE)
- alcyon, Isocyprina alcyon (A.V.M.D. D'Orbigny, 1850 †) - (ARCTICIDAE) (FOSSIL)
- alcyone, Kylix alcyone (W.H. Dall, 1919) - (DRILLIIDAE)
- alcyone, Charitodoron alcyone M. Lussi, 2009 - (MITRIDAE)
- alcyonea, Drillia alcyonea J.C. Melvill & R. Standen, 1901 - (DRILLIIDAE)
- alcyoneum, Fusinus alcyoneum R. Hadorn & K. Fraussen, 2006 - (FASCIOLARIIDAE)
- aldabra, Kaliella aldabra J. Gerlach, 2009 - (CHRONIDAE)
- aldabra, Rachistia aldabra Unknown - (ENIDAE)
- aldabrae, Rhachis aldabrae E.C. Von Martens, 1898 - (CERASTUIDAE)
- aldabrana, Kaliella aldabrana J. Gerlach, 2009 - syn of: Kaliella aldabra J. Gerlach, 2009 - (CHRONIDAE)
- aldabrensis, Quickia aldabrensis A.H. Patterson, 1975 - (SUCCINEIDAE)
- Aldanella, Genus Aldanella Vostokova, 1962 † (ALDANELLIDAE) (FOSSIL)
- ALDANELLIDAE Linsley & Kier, 1984 † - Family (HELCIONELLOIDA-ARCHAEOBRANCHIA [Subclass]-PELAGIELLIFORMES [Order]-PELAGIELLOIDEA [Superfamily]) (FOSSIL)
- aldanensis, Palaeonucula aldanensis Kurushin, 1987 † - (NUCULIDAE) (FOSSIL)
- aldanica, Exilitheca aldanica (Missarzehevsky in Rozanov & al., 1969 †) - (ALLATHECIDAE) (FOSSIL)
- aldanica, Obliquatheca aldanica A.V. Sysoev, 1968 † - (ALLATHECIDAE) (FOSSIL)
- aldanica, Egdetheca aldanica Missarzehevsky in Rozanov & al., 1969 † - syn of: Exilitheca aldanica (Missarzehevsky in Rozanov & al., 1969 †) - (ALLATHECIDAE) (FOSSIL)
- aldanica, Edgetheca aldanica Yü, 1974 † - syn of: Conotheca subcurvata Yü, 1974 † - (CIRCOTHECIDAE) (FOSSIL)
- aldanicum, Yakutoceras aldanicum (Librovitch in A.M. Popov, 1965 †) - (ORULGANITIDAE) (FOSSIL)
- Aldanites, Genus Aldanites Popov, 1970 † (ORULGANITIDAE) (FOSSIL)
- Aldanolina, Genus Aldanolina Pelman, 1983 † (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- Aldanotheca, Genus Aldanotheca Meshkova, 1974 (SPINULITHECIDAE) (FOSSIL)
- aldemaricus, Unio aldemaricus J.R. Bourguignat, 1889 - syn of: Unio tumidus A. Retzius, 1788 - (UNIONIDAE)
- Alderella, Genus Alderella N.H. Odhner in A. Franc, 1968 (LIMAPONTIIDAE)
- alderi, Aeolidiella alderi (W.P. Cocks, 1852) - (AEOLIDIIDAE)
- alderi, Barleeia alderi (P.P. Carpenter, 1857) - (BARLEEIIDAE)
- alderi, Goniobranchus alderi (C. Collingwood, 1881) - (CHROMODORIDIDAE)
- alderi, Euconulus alderi (J.E. Gray, 1840) - (EUCONULIDAE)
- alderi, Coryphella alderi A. Adams, 1861 - (FLABELLINIDAE)
- alderi, Lutraria alderi Unknown - (MACTRIDAE)
- alderi, Natica alderi E. Forbes, 1838 - syn of: Euspira nitida (E. Donovan, 1804) - (NATICIDAE)
- alderi, Onchidium alderi J.E. Gray, 1850 - syn of: Peronia verruculata (G.L.C.F.D. Cuvier, 1830) - (ONCHIDIIDAE)
- alderi, Peronia alderi J.E. Gray, 1850 - syn of: Peronia verruculata (G.L.C.F.D. Cuvier, 1830) - (ONCHIDIIDAE)
- alderi, Obtusella alderi J.G. Jeffreys, 1858 - syn of: Obtusella intersecta (W. Wood, 1857) - (RISSOIDAE)
- alderi, Dikoleps alderi J.G. Jeffreys, 1865 - syn of: Dikoleps nitens (R.A. Philippi, 1844) - (SKENEIDAE)
- alderi elata, Natica alderi elata M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1883 - syn of: Euspira nitida (E. Donovan, 1804) - (NATICIDAE)
- alderi globulosa, Natica alderi globulosa M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1883 - syn of: Euspira nitida (E. Donovan, 1804) - (NATICIDAE)
- alderi lactea, Natica alderi lactea J.G. Jeffreys, 1867 - syn of: Euspira nitida (E. Donovan, 1804) - (NATICIDAE)
- alderi subovalis, Natica alderi subovalis J.G. Jeffreys, 1867 - syn of: Euspira nitida (E. Donovan, 1804) - (NATICIDAE)
- alderi ventricosa, Natica alderi ventricosa J.G. Jeffreys, 1867 - syn of: Euspira nitida (E. Donovan, 1804) - (NATICIDAE)
- Alderia, Genus Alderia G.J. Allman, 1845 (LIMAPONTIIDAE)
- alderiana, Spurilla alderiana G.P. Deshayes in A. Frédol, 1865 - syn of: Spurilla neapolitana (S. Delle Chiaje, 1841) - (AEOLIDIIDAE)
- alderiana, Fadyenia alderiana (E. Chitty, 1857) - (HELICINIDAE)
- alderii, Octopus alderii J.B. Vérany, 1851 - syn of: Callistoctopus macropus (A. Risso, 1826) - (OCTOPODIDAE)
- Alderiopsis, Genus Alderiopsis K. Baba, 1968 (LIMAPONTIIDAE)
- aldermenensis, Calagrassor aldermenensis (A.W.B. Powell, 1971) - (BUCCINIDAE)
- aldermenensis, Eosipho aldermenensis A.W.B. Powell, 1971 - syn of: Calagrassor aldermenensis (A.W.B. Powell, 1971) - (BUCCINIDAE)
- aldersona, Hamulina aldersona F.M. Anderson, 1938 † - (HAMULINIDAE) (FOSSIL)
- aldersoni, Pomacea aldersoni (T. Pain, 1946) - (AMPULLARIIDAE)
- aldeynzeri, Cycloscala aldeynzeri E.F. Garcia, 2001 - (EPITONIIDAE)
- aldeynzeri, Hemipolygona aldeynzeri (E.F. Garcia, 2001) - (FASCIOLARIIDAE)
- aldeynzeri, Latirus aldeynzeri E.F. Garcia, 2001 - syn of: Hemipolygona aldeynzeri (E.F. Garcia, 2001) - (FASCIOLARIIDAE)
- aldeynzeri, Volvarina aldeynzeri T. Cossignani, 2005 - (MARGINELLIDAE)
- aldeynzeri, Parvamussium aldeynzeri H.H. Dijkstra, 2004 - (PROPEAMUSSIIDAE)
- aldingae, Ovatella aldingae (R. Tate, 1878) - (ELLOBIIDAE)
- aldingae, Tellina aldingae (N.H. Ludbrook, 1959 †) - (TELLINIDAE) (FOSSIL)
- aldingensis, Peristernia aldingensis R. Tate, 1888 † - (FASCIOLARIIDAE) (FOSSIL)
- aldingensis, Friginatica aldingensis (R. Tate, 1893 †) - (NATICIDAE) (FOSSIL)
- aldingensis, Serripecten aldingensis (R. Tate, 1886 †) - (PECTINIDAE) (FOSSIL)
- aldinia, Oliva fulgurator aldinia P.L. Duclos, 1845 - (OLIVIDAE)
- Aldisa, Genus Aldisa L.S.R. Bergh, 1878 (CADLINIDAE)
- aldra, Assiminea aldra W.H. Dall, 1915 - (ASSIMINEIDAE)
- aldrichi, Ovulactaeon aldrichi Wheeler, 1910 † - (ACTEONIDAE) (FOSSIL)
- aldrichi, Amnicola aldrichi R.E. Call & C.E. Beecher, 1886 - (AMNICOLIDAE)
- aldrichi, Floribella aldrichi (W.H. Dall, 1890 †) - (APLYSIIDAE) (FOSSIL)
- aldrichi, Australiteuthis aldrichi (C.C. Lu, 2005) - (AUSTRALITEUTHIDAE)
- aldrichi, Busycon aldrichi Gardner, 1947 † - (BUSYCONIDAE) (FOSSIL)
- aldrichi, Planispira aldrichi J. Henderson, 1898 - (CAMAENIDAE)
- aldrichi, Cancellaria aldrichi J. Gardner, 1937 † - (CANCELLARIIDAE) (FOSSIL)
- aldrichi, Pleuromeris aldrichi G.F. Harris, 1919 † - syn of: Carditella aldrichi (G.F. Harris, 1919 †) - (CARDITIDAE) (FOSSIL)
- aldrichi, Semicassis aldrichi W.H. Dall, 1890 † - (CASSIDAE) (FOSSIL)
- aldrichi, Glyphostoma aldrichi C.J. Maury, 1910 † - (CLATHURELLIDAE) (FOSSIL)
- aldrichi, Strombina aldrichi C.J. Maury, 1910 † - (COLUMBELLIDAE) (FOSSIL)
- aldrichi, Carditella aldrichi (G.F. Harris, 1919 †) - (CONDYLOCARDIIDAE) (FOSSIL)
- aldrichi, Vokesula aldrichi (O. Meyer, 1885 †) - (CORBULIDAE) (FOSSIL)
- aldrichi, Corbula aldrichi O. Meyer, 1885 † - syn of: Vokesula aldrichi (O. Meyer, 1885 †) - (CORBULIDAE) (FOSSIL)
- aldrichi, Abderospira aldrichi (Langdon, 1886 †) - (CYLICHNIDAE) (FOSSIL)
- aldrichi, Diplommatina aldrichi H.H. Godwin-Austen, 1894 - syn of: Diplommatina canaliculata O.F. von Möllendorff, 1887 - (DIPLOMMATINIDAE)
- aldrichi, Latirus aldrichi D.T. Dockery, 1984 † - (FASCIOLARIIDAE) (FOSSIL)
- aldrichi, Pickfordiateuthis aldrichi C.C. Lu, 2005 - syn of: Australiteuthis aldrichi (C.C. Lu, 2005) - (LOLIGINIDAE)
- aldrichi, Anculosa aldrichi H.H. Smith in C. Goodrich, 1922 - (PLEUROCERIDAE)
- aldrichi, Calyptraphorus aldrichi Gardner, 1933 † - (ROSTELLARIIDAE) (FOSSIL)
- aldrichi, Solecurtus aldrichi (Gardner, 1928 †) - (SOLECURTIDAE) (FOSSIL)
- aldrichi, Persististrombus aldrichi (W.H. Dall, 1890 †) - (STROMBIDAE) (FOSSIL)
- aldrichi, Pleurobema aldrichi L.S. Frierson, 1927 - syn of: Pleurobema taitianum I. Lea, 1834 - (UNIONIDAE)
- aldrichi, Pitar aldrichi D.T. Dockery, 1982 † - (VENERIDAE) (FOSSIL)
- aldrichi antroecetes, Amnicola aldrichi antroecetes L.R. Hubricht, 1940 - (AMNICOLIDAE)
- aldrichi insolita, Amnicola aldrichi insolita L.R. Hubricht, 1940 - (AMNICOLIDAE)
- Aldrichia, Genus Aldrichia Palmer, 1937 † (NEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- aldrichiana, Gastrodonta aldrichiana W.F. Clapp, 1907 - (GASTRODONTIDAE)
- aldrichiana, Adrana aldrichiana G.F. Harris, 1895 † - (NUCULANIDAE) (FOSSIL)
- aldrichianum, Pleurobema aldrichianum C. Goodrich, 1931 - syn of: Pleurobema hanleyianum I. Lea, 1852 - (UNIONIDAE)
- aldrichianus, Crassinella aldrichianus T.H. Aldrich, 1911 † - (CRASSATELLIDAE) (FOSSIL)
- aldrichianus, Helicodiscus aldrichianus W.F. Clapp, 1907 - (HELICODISCIDAE)
- aldridgei, Attiliosa aldridgei (G.W. Nowell-Usticke, 1969) - (MURICIDAE)
- aldridgei, Solen aldridgei G.W. Nowell-Usticke, 1969 - (SOLENIDAE)
- aldridgei, Vasum aldridgei G.W. Nowell-Usticke, 1969 - syn of: Attiliosa aldridgei (G.W. Nowell-Usticke, 1969) - (TURBINELLIDAE)
- aldrovandi, Aporrhais aldrovandi G. Capellini, 1860 - syn of: Aporrhais pespelicani (C. Linnaeus, 1758) - (APORRHAIDAE)
- aldrovandi, Conus aldrovandi Hoernes, 1851 † - (CONIDAE) (FOSSIL)
- aldrovandi, Conus aldrovandi Brocchi, 1814 † - (CONIDAE) (FOSSIL)
- aldrovandi, Conus aldrovandi P. Dautzenberg, 1937 - syn of: Lithoconus leopardus (P.F. Röding, 1798) - (CONIDAE)
- aldrovandi, Panopea aldrovandi M. Ménard De La Groye, 1807 - syn of: Panopea glycimeris (I. von Born, 1778) - (HIATELLIDAE)
- aldrovandi, Ozoena aldrovandi C.S. Rafinesque, 1814 - syn of: Eledone cirrhosa (J.B.P.A. Lamarck, 1798) - (OCTOPODIDAE)
- aldrovandi, Eledone cirrhosa aldrovandi (P.D. Montfort, 1802) - (OCTOPODIDAE)
- aldrovandii, Omphaloptycha aldrovandii (Stoppani, 1857 †) - (COELOSTYLINIDAE) (FOSSIL)
- aldrovandii, Nassarius aldrovandii (L.M.D. Bellardi, 1882 †) - (NASSARIIDAE) (FOSSIL)
- alduini, Pleuromya alduini (A. Brongniart, 1821 †) - (PLEUROMYIDAE) (FOSSIL)
- alduneata, Plectostylus chilensis alduneata L.H. Hupé, 1854 - (BOTHRIEMBRYONTIDAE)
- alea, Phalium alea P.F. Röding, 1798 - syn of: Phalium areola (C. Linnaeus, 1758) - (CASSIDAE)
- alea, Frustropa alea T. Iredale, 1945 - (CHAROPIDAE)
- aleata, Haliotis aleata P.F. Röding, 1798 - syn of: Haliotis australis J.F. Gmelin, 1791 - (HALIOTIDAE)
- Aleatelix, syn of: Genus Chloritis H.H. Beck, 1837 (CAMAENIDAE)
- alecto, Octopus alecto S.S. Berry, 1953 - (OCTOPODIDAE)
- alectodens, Priscoficus alectodens J. Marwick, 1942 † - (FICIDAE) (FOSSIL)
- alectona, Olivella alectona (P.L. Duclos, 1835) - (OLIVELLIDAE)
- alectona, Oliva alectona P.L. Duclos, 1835 - syn of: Olivella alectona (P.L. Duclos, 1835) - (OLIVIDAE)
- Alectrion, syn of: Genus Nassarius Duméril, 1805 (NASSARIIDAE)
- ALECTRIONIDAE - syn of Family: NASSARIIDAE
- Alectryonella, Genus Alectryonella F. Sacco, 1897 (OSTREIDAE)
- Alectryonia, Subgenus Ostrea (Alectryonia) Fischer de Waldheim, 1807 † (OSTREIDAE) (FOSSIL)
- Alectryonia, syn of: Genus Lopha P.F. Röding, 1798 (OSTREIDAE)
- Alectryonia, syn of: Genus Lopha P.F. Röding, 1798 (OSTREIDAE)
- Alectryossia, syn of: Subgenus Ostrea (Alectryonia) Fischer de Waldheim, 1807 † (OSTREIDAE) (FOSSIL)
- alectus, Anomia alectus J.E. Gray, 1850 - syn of: Anomia peruviana A.V.M.D. D'Orbigny, 1846 - (ANOMIIDAE)
- alegranzae, Parmacella alegranzae R. Hutterer & K. Groh, 1991 - (PARMACELLIDAE)
- alegrensis, Microceramus alegrensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- alegriae, Amandana caroli alegriae F. Schröder, 1985 - (HYGROMIIDAE)
- alei, Goniophora alei Liljedahl, 1994 † - (MODIOMORPHIDAE) (FOSSIL)
- alejandrae, Osvaldoginella alejandrae J. Espinosa & J.A. Ortea, 2014 - (CYSTISCIDAE)
- alejandroi, Volvarina alejandroi J. Espinosa, J.A. Ortea & L. Moro, 2009 - (MARGINELLIDAE)
- alekense, Uraloceras alekense Bogoslovskaya, 1976 † - (PARAGASTRIOCERATIDAE) (FOSSIL)
- alekseevi, Amerevohelix alekseevi A.V. Guzhov, 2010 † - (DISCOHELICIDAE) (FOSSIL)
- Alekseites, Genus Alekseites Lyashenko, 1969 † (VOLYNITIDAE) (FOSSIL)
- alekseitschiki, Oistotrigonia alekseitschiki (Saveliev, 1958 †) - (PTEROTRIGONIIDAE) (FOSSIL)
- aleman, Geomelania aleman H.A. Pilsbry - (TRUNCATELLIDAE)
- alemanica, Trigonia alemanica (Rollier, 1912 †) - (TRIGONIIDAE) (FOSSIL)
- alenae, Torresitrachia alenae R.C. Willan, F. Köhler, V. Kessner & M.F. Braby, 2009 - (CAMAENIDAE)
- alenae, Streblopteria alenae Biakov, 2002 † - (DELTOPECTINIDAE) (FOSSIL)
- alencasterae, Busycon alencasterae Perrilliat, 1963 † - (BUSYCONIDAE) (FOSSIL)
- Alencasteria, Genus Alencasteria Mitchell, 2013 † (ANTILLOCAPRINIDAE) (FOSSIL)
- Alencasterites, Genus Alencasterites Pons, Vicens & Schmidt-Effing, 2016 † (RADIOLITIDAE) (FOSSIL)
- Aleodonta, Genus Aleodonta Liljedahl, 1994 † (MODIOMORPHIDAE) (FOSSIL)
- alepensis, Buliminus alepensis (L. Pfeiffer, 1841) - (ENIDAE)
- alepensis, Melanopsis alepensis P.M. Pallary, 1939 - syn of: Melanopsis alepi J.R. Bourguignat, 1884 - (MELANOPSIDAE)
- alepensis marsabensis, Buliminus alepensis marsabensis C.A. Westerlund, 1887 - (ENIDAE)
- alephtinae, Cetoconcha alephtinae (E.M. Krylova, 1991) - (CETOCONCHIDAE)
- alepi, Melanopsis alepi J.R. Bourguignat, 1884 - (MELANOPSIDAE)
- aleronii, Unio aleronii M. Companyo & P. Massot, 1845 - syn of: Unio mancus J.B.P.A. Lamarck, 1819 - (UNIONIDAE)
- alerta, Tellina alerta (K.J. Boss, 1964) - (TELLINIDAE)
- alerta, Merisca alerta K.J. Boss, 1964 - syn of: Tellina alerta (K.J. Boss, 1964) - (TELLINIDAE)
- alertae, Cominella alertae (R.K. Dell, 1956) - (BUCCINIDAE)
- alertae, Cominella alertae R.K. Dell, 1956 - syn of: Cominella alertae (R.K. Dell, 1956) - (BUCCINIDAE)
- alertae, Alertalex alertae (B.A. Marshall, 1995) - (CALLIOSTOMATIDAE)
- alertae, Calliostoma alertae B.A. Marshall, 1995 - syn of: Alertalex alertae (B.A. Marshall, 1995) - (CALLIOSTOMATIDAE)
- alertae, Melanella alertae (R.K. Dell, 1956) - (EULIMIDAE)
- Alertalex, Subgenus Maurea (Alertalex) Dell, 1956 (CALLIOSTOMATIDAE)
- Alertalex, syn of: Genus Otukaia N. Ikebe, 1942 (CALLIOSTOMATIDAE)
- ales, Ctenoides ales Finlay, 1927 - (LIMIDAE)
- ales, Lima ales H.J. Finlay, 1927 - syn of: Ctenoides ales Finlay, 1927 - (LIMIDAE)
- alesidota, Kurtziella alesidota W.H. Dall, 1919 - syn of: Kurtziella plumbea (R.B. Hinds, 1843) - (MANGELIIDAE)
- alesidota, Hindsiclava alesidota (W.H. Dall, 1889) - (PSEUDOMELATOMIDAE)
- alesii, Parthenina alesii P. Micali, I. Nofroni & E. Perna, 2012 - (PYRAMIDELLIDAE)
- alessandrinii, Ancistrocheirus alessandrinii J.B. Vérany, 1851 - syn of: Ancistrocheirus lesueurii (A.V.M.D. D'Orbigny, 1842) - (ANCISTROCHEIRIDAE)
- alessandrinii, Thelidioteuthis alessandrinii J.B. Vérany, 1847 - syn of: Ancistrocheirus lesueurii (A.V.M.D. D'Orbigny, 1842) - (ENOPLOTEUTHIDAE)
- alessandrinii, Loligo alessandrinii J.B. Vérany, 1847 - syn of: Ancistrocheirus lesueurii (A.V.M.D. D'Orbigny, 1842) - (LOLIGINIDAE)
- Aleteceras, Genus Aleteceras Whitehouse , 1926 † (LABECERATIDAE) (FOSSIL)
- aletes, Lithococcus aletes F.G. Thompson & R. Hershler, 1991 - (LITHOGLYPHIDAE)
- aletes, Prunum aletes B. Roth, 1978 - (MARGINELLIDAE)
- aletes, Pecten aletes L.G. Hertlein, 1925 † - (PECTINIDAE) (FOSSIL)
- aletes, Hyphantosoma aletes (L.G. Hertlein & A.M. Strong, 1948) - (VENERIDAE)
- aletes, Pitar aletes L.G. Hertlein & A.M. Strong, 1948 - syn of: Hyphantosoma aletes (L.G. Hertlein & A.M. Strong, 1948) - (VENERIDAE)
- Aletes, syn of: Genus Serpulorbis M. Sassi, 1827 (VERMETIDAE)
- alethes, Bassleroceras alethes (Billings, 1865 †) - (BASSLEROCERATIDAE) (FOSSIL)
- alethia, Paravitrea alethia L.R. Hubricht, 1978 - (ZONITIDAE)
- alethorhytidus, Naesiotus alethorhytidus W.H. Dall, 1917 - (BULIMULIDAE)
- Alethynoceras, Genus Alethynoceras Zhuravleva, 1974 † (NAUTILIDA (UNASSIGNED)) (FOSSIL)
- aletici, Illyricocongeria aletici (Š. Brusina, 1907 †) - (DREISSENIDAE) (FOSSIL)
- Aletoceras, Genus Aletoceras Flower, 1938 † (BREVICOCERATIDAE) (FOSSIL)
- aleutaceum, Bittium aleutaceum A.A. Gould, 1861 - syn of: Bittium alutaceum A.A. Gould, 1861 - (CERITHIIDAE)
- aleutica, Samacar aleutica (G.M. Kamenev, 2007) - (ARCIDAE)
- aleutica, Pseudoporterius aleutica G.M. Kamenev, 2007 - syn of: Samacar aleutica (G.M. Kamenev, 2007) - (ARCIDAE)
- aleutica, Callochiton aleutica W.H. Dall, 1878 - syn of: Lepidochitona aleutica (W.H. Dall, 1878) - (CALLOCHITONIDAE)
- aleutica, Falsicingula aleutica (W.H. Dall, 1887) - (FALSICINGULIDAE)
- aleutica, Lepidochitona aleutica (W.H. Dall, 1878) - (LEPIDOCHITONIDAE)
- aleutica, Spongioradsia aleutica (W.H. Dall, 1878) - syn of: Lepidochitona aleutica (W.H. Dall, 1878) - (LEPIDOCHITONIDAE)
- aleutica, Littorina aleutica W.H. Dall, 1872 - (LITTORINIDAE)
- aleutica, Mangelia aleutica W.H. Dall, 1871 - (MANGELIIDAE)
- aleutica, Oenopotella ultraabyssalis aleutica A.V. Sysoev, 1988 - (MANGELIIDAE)
- aleutica, Mysella aleutica W.H. Dall, 1899 - syn of: Kurtiella tumida (Carpenter, 1864) - (MONTACUTIDAE)
- aleutica, Cryptonatica aleutica (W.H. Dall, 1919) - (NATICIDAE)
- aleutica, Odostomia aleutica W.H. Dall & P. Bartsch, 1909 - (PYRAMIDELLIDAE)
- aleutica, Cingula aleutica W.H. Dall, 1886 - syn of: Falsicingula aleutica (W.H. Dall, 1887) - (RISSOIDAE)
- aleutica, Ervilia aleutica W.H. Dall, 1924 - (SEMELIDAE)
- aleutica, Diplodonta aleutica W.H. Dall, 1901 - (UNGULINIDAE)
- aleuticum, Buccinum aleuticum W.H. Dall, 1895 - (BUCCINIDAE)
- aleuticum, Periploma aleuticum (A. Krause, 1885) - (PERIPLOMATIDAE)
- aleuticus, Japelion aleuticus (W.H. Dall, 1895) - (BUCCINIDAE)
- alevolatus, Ocenebra alevolatus R. Tate, 1888 † - syn of: Paziella graniformis G.F. Harris, 1897 † - (MURICIDAE) (FOSSIL)
- alexander, Placostylus fibratus alexander (J.C.H. Crosse, 1855) - (BOTHRIEMBRYONTIDAE)
- alexander, Bulimus alexander J.C.H. Crosse, 1855 - syn of: Placostylus fibratus alexander (J.C.H. Crosse, 1855) - (BULIMULIDAE)
- alexander, Cincinnatia alexander (F.G. Thompson, 2000) - (HYDROBIIDAE)
- alexander crassa, Placostylus alexander crassa H.A. Pilsbry, 1900 - syn of: Placostylus fibratus alexander (J.C.H. Crosse, 1855) - (BOTHRIEMBRYONTIDAE)
- alexander leucostoma, Placostylus alexander leucostoma H.A. Pilsbry, 1900 - syn of: Placostylus fibratus alexander (J.C.H. Crosse, 1855) - (BOTHRIEMBRYONTIDAE)
- alexander ouagapensis, Placostylus alexander ouagapensis H.A. Pilsbry, 1900 - syn of: Placostylus fibratus alexander (J.C.H. Crosse, 1855) - (BOTHRIEMBRYONTIDAE)
- alexander patula, Placostylus alexander patula W. Kobelt, 1891 - syn of: Placostylus fibratus alexander (J.C.H. Crosse, 1855) - (BOTHRIEMBRYONTIDAE)
- alexander procerula, Placostylus alexander procerula H.A. Pilsbry, 1900 - syn of: Placostylus fibratus alexander (J.C.H. Crosse, 1855) - (BOTHRIEMBRYONTIDAE)
- alexanderi, Flemingites alexanderi Smyshlyaeva & Zakharov, 2013 † - (FLEMINGITIDAE) (FOSSIL)
- alexanderi, Maximites alexanderi Nassichuk, 1975 † - (MAXIMITIDAE) (FOSSIL)
- alexanderi, Orania alexanderi R. Houart, 1985 - syn of: Orania xuthedra (J.C. Melvill, 1893) - (MURICIDAE)
- alexanderi, Sphyradium alexanderi C.M. Cooke & H.A. Pilsbry, 1906 - syn of: Columella alexandri C.M. Cooke & H.A. Pilsbry, 1906 - (ORCULIDAE)
- alexanderi, Odostomia alexanderi J. Marwick, 1929 † - (PYRAMIDELLIDAE) (FOSSIL)
- alexanderi, Aemiliella ripkeni alexanderi P.L. Reischütz, V. Štamol & P. Subai, 2012 - (SPELAEODISCIDAE)
- alexanderi, Columella alexanderi C.M. Cooke & H.A. Pilsbry, 1906 - syn of: Columella alexandri C.M. Cooke & H.A. Pilsbry, 1906 - (VERTIGINIDAE)
- alexandra, Omospira alexandra (Billings, 1865 †) - (LOXONEMATIDAE) (FOSSIL)
- alexandra, Myophorella alexandra E.O. Willey, 1975 † - (MYOPHORELLIDAE) (FOSSIL)
- alexandrae, Ariadnaria alexandrae R.V. Egorov & D.O. Alexeyev, 1998 - (CAPULIDAE)
- alexandrae, Epigymnites alexandrae (Smith, 1914 †) - (GYMNITIDAE) (FOSSIL)
- alexandrae, Setia alexandrae S.P. Ávila & J. Cordeiro, 2014 - (RISSOIDAE)
- alexandrei, Phasmoconus alexandrei L. Limpalaër & E. Monnier, 2012 - (CONIDAE)
- alexandrei, Manzonia alexandrei S. Gofas, 2010 - (RISSOIDAE)
- alexandrei, Scissurella alexandrei P.C. Montouchet, 1972 - (SCISSURELLIDAE)
- alexandremonteiroi, Conasprella alexandremonteiroi (T. Cossignani, 2014) - (CONIDAE)
- alexandremonteiroi, Jaspidiconus alexandremonteiroi T. Cossignani, 2014 - syn of: Conasprella alexandremonteiroi (T. Cossignani, 2014) - (CONIDAE)
- alexandri, Gulickia alexandri C.M. Cooke, 1915 - (ACHATINELLIDAE)
- alexandri, Achatinella alexandri W. Newcomb - syn of: Laminella alexandri W. Newcomb, 1865 - (ACHATINELLIDAE)
- alexandri, Laminella alexandri W. Newcomb, 1865 - (AMASTRIDAE)
- alexandri, Lanistes alexandri J.R. Bourguignat, 1889 - (AMPULLARIIDAE)
- alexandri, Rhinoclavis alexandri (J.R. le B. Tomlin, 1923) - (CERITHIIDAE)
- alexandri, Dorcasia alexandri J.E. Gray, 1838 - (DORCASIIDAE)
- alexandri, Catenohalorites alexandri (Mojsisovics, 1893 †) - (HALORITIDAE) (FOSSIL)
- alexandri, Limacina alexandri A.E. Verrill, 1872 - syn of: Limacina retroversa (J. Fleming, 1823) - (LIMACINIDAE)
- alexandri, Chlamys alexandri E.W. Vredenburg, 1928 † - (PECTINIDAE) (FOSSIL)
- alexandri, Pisidium alexandri (A. Stadnichenko, 1980) - (SPHAERIIDAE)
- alexandri, Casertiana alexandri A. Stadnichenko, 1980 - syn of: Pisidium alexandri (A. Stadnichenko, 1980) - (SPHAERIIDAE)
- alexandri, Roseana alexandri A. Stadnichenko, 1980 - syn of: Pisidium alexandri (A. Stadnichenko, 1980) - (SPHAERIIDAE)
- alexandri, Triphora alexandri J.R. le B. Tomlin, 1931 - (TRIPHORIDAE)
- alexandri, Priotrochus alexandri J.R. le B. Tomlin, 1926 - syn of: Priotrochus obscurus ponsonbyi (G.B. III Sowerby, 1888) - (TROCHIDAE)
- alexandri, Columella alexandri C.M. Cooke & H.A. Pilsbry, 1906 - (VERTIGINIDAE)
- alexandri, Vitrina alexandri C.A. Westerlund, 1896 - syn of: Vitrina rugulosa E.C. Von Martens, 1874 - (VITRINIDAE)
- alexandri depicta, Laminella alexandri depicta D.D. Baldwin, 1895 - (AMASTRIDAE)
- alexandri duoplicata, Laminella alexandri duoplicata D.D. Baldwin, 1908 - (AMASTRIDAE)
- alexandria, Conus alexandria J.M. Ostergaard, 1985 - syn of: Virroconus chaldaeus (P.F. Röding, 1798) - (CONIDAE)
- Alexandria, syn of: Genus Alexania E. Strand, 1928 (EPITONIIDAE)
- alexandrieni, Viviparus alexandrieni Cobalcescu, 1883 † - (VIVIPARIDAE) (FOSSIL)
- alexandrina, Corbicula alexandrina P.M. Pallary, 1909 - syn of: Corbicula fluminalis (O.F. Müller, 1774) - (CYRENIDAE)
- alexandrina, Nassarius alexandrina P.M. Pallary, 1917 † - syn of: Tritia cuvierii (B.C.M. Payraudeau, 1826 †) - (NASSARIIDAE) (FOSSIL)
- alexandrina, Biomphalaria alexandrina (C.G. Ehrenberg, 1831) - (PLANORBIDAE)
- alexandrina, Taranis alexandrina R. Sturany, 1896 - syn of: Taranis moerchi (A.W. Malm, 1861) - (RAPHITOMIDAE)
- alexandrinum, Calliostoma zizyphinum alexandrinum P.M. Pallary, 1912 - (CALLIOSTOMATIDAE)
- alexandrinus, Varioconus alexandrinus (S.D. Kaicher, 1977) - (CONIDAE)
- alexandrinus, Conus alexandrinus S.D. Kaicher, 1977 - syn of: Varioconus alexandrinus (S.D. Kaicher, 1977) - (CONIDAE)
- alexandroe, Arthaberites alexandroe Diener, 1900 † - (CERATITIDA (UNASSIGNED)) (FOSSIL)
- Alexandromenia, Genus Alexandromenia H. Heath, 1911 (AMPHIMENIIDAE)
- Alexandronautilus, Genus Alexandronautilus Shimanskiy, 1962 † (LIROCERATIDAE) (FOSSIL)
- Alexania, Genus Alexania E. Strand, 1928 (EPITONIIDAE)
- alexantoni, Parmacella alexantoni A. Martínez-Ortí & V. Borredà, 2013 - (PARMACELLIDAE)
- alexarthuri, Sconsia alexarthuri M. Parth, 1994 - (CASSIDAE)
- alexbrownii, Archivolva alexbrownii F.Jr. Lorenz, 2012 - (OVULIDAE)
- alexclarki, Vertipecten alexclarki W.O. Addicott, 1973 † - (PECTINIDAE) (FOSSIL)
- alexeevae, Bajarunia alexeevae (A.M. Popov, 1961 †) - (MEEKOCERATIDAE) (FOSSIL)
- alexeevi, Scalaspira alexeevi O.V. Amitrov, 2005 † - (STREPSIDURIDAE) (FOSSIL)
- alexei, Aenigmastyletus alexei A.V. Martynov, 1998 - (EUBRANCHIDAE)
- alexenkoae, Potamopyrgus alexenkoae V.V. Anistratenko, 1995 - syn of: Potamopyrgus antipodarum (J.E. Gray, 1843) - (TATEIDAE)
- alexeyevi, Neptunea alexeyevi K. Fraussen & Y. Terryn, 2007 - (BUCCINIDAE)
- alexhuberti, Austrasiatica alexhuberti (F.Jr. Lorenz & M. Huber, 2000) - (CYPRAEIDAE)
- alexhuberti, Pseudocypraea alexhuberti F.Jr. Lorenz, 2006 - (PEDICULARIIDAE)
- alexi, Tunglanites alexi Kummel, 1969 † - (COLUMBITIDAE) (FOSSIL)
- alexi, Nayadina alexi Clark, 1934 † - syn of: Nayadina llajasensis Clark, 1934 † - (ELIGMIDAE) (FOSSIL)
- alexi, Provanna alexi K. Amano & C. Little, 2014 † - (PROVANNIDAE) (FOSSIL)
- Alexia, syn of: Genus Ovatella Ant. Bivona-Bernardi, 1832 (ELLOBIIDAE)
- alexiae, Oestophora alexiae Ahuir & Torres, 2017 - (TRISSEXODONTIDAE)
- Alexiella, Genus Alexiella Lyashenko, 1969 † (NOWAKIIDAE) (FOSSIL)
- alexis, Geotrochus alexis (E.A. Smith, 1895) - (HELICARIONIDAE)
- alexisi, Chelidonura alexisi T.M. Gosliner, 2015 - (AGLAJIDAE)
- alexisi, Rissoina alexisi H.S. Ladd, 1966 † - (RISSOINIDAE) (FOSSIL)
- alexisi, Xylophaga alexisi J.R. Voight & M. Segonzac, 2012 - (XYLOPHAGAIDAE)
- alexleoni, Turbonilla alexleoni A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- Alexogyra, Genus Alexogyra Bandel, 1996 † (HYALOGYRINIDAE) (FOSSIL)
- alfaroi, Voluta alfaroi W.H. Dall, 1912 † - (VOLUTIDAE) (FOSSIL)
- Alfeldites, Genus Alfeldites Westermann, 1975 † (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- alferovi, Borissia alferovi (Slodkewitsch, 1938 †) - (NUCULANIDAE) (FOSSIL)
- alferovi vengeriensis, Borissia alferovi vengeriensis Kogan, 1964 † - syn of: Borissia vengeriensis (Kogan, 1964 †) - (NUCULANIDAE) (FOSSIL)
- alfi, Discotectonica alfi Thach, 2017 - (ARCHITECTONICIDAE)
- alfi, Cantrainea alfi Y.F. Huang, C.C. Fu & G.T. Poppe, 2016 - (COLLONIIDAE)
- alfi, Vituliconus alfi (N.N. Thach, 2016) - (CONIDAE)
- alfiopivai, Plesiocystiscus alfiopivai J. Espinosa & J.A. Ortea, 2002 - (CYSTISCIDAE)
- alfordae, Voluta alfordae A.H. Verrill, 1953 - syn of: Voluta musica C. Linnaeus, 1758 - (VOLUTIDAE)
- alforum, Fulgoraria alforum N.N. Thach, 2014 - (VOLUTIDAE)
- alfredense, Cyclostrema alfredense P. Bartsch, 1915 - syn of: Parviturbo alfredensis P. Bartsch, 1915 - (LIOTIIDAE)
- alfredense, Gafrarium alfredense (P. Bartsch, 1915) - (VENERIDAE)
- alfredensis, Anomia alfredensis W.H. Turton, 1932 - syn of: Enigmonia aenigmatica (H.S. Holten, 1802) - (ANOMIIDAE)
- alfredensis, Enigmonia alfredensis W.H. Turton, 1932 - syn of: Enigmonia aenigmatica (H.S. Holten, 1802) - (ANOMIIDAE)
- alfredensis, Solarium alfredensis W.H. Turton, 1932 - syn of: Heliacus implexus alfredensis (W.H. Turton, 1932) - (ARCHITECTONICIDAE)
- alfredensis, Heliacus implexus alfredensis (W.H. Turton, 1932) - (ARCHITECTONICIDAE)
- alfredensis, Barbatia alfredensis P. Bartsch, 1915 - syn of: Barbatia obliquata (W. Wood, 1828) - (ARCIDAE)
- alfredensis, Cinysca alfredensis (P. Bartsch, 1915) - (ARENEIDAE)
- alfredensis, Cominella alfredensis P. Bartsch, 1915 - syn of: Afrocominella capensis simoniana (S.A.A. Petit De La Saussaye, 1852) - (BUCCINIDAE)
- alfredensis, Bursa granularis alfredensis W.H. Turton, 1932 - (BURSIDAE)
- alfredensis, Alabina alfredensis P. Bartsch, 1915 - (CERITHIIDAE)
- alfredensis, Seila alfredensis (P. Bartsch, 1915) - (CERITHIOPSIDAE)
- alfredensis, Cerithiopsis alfredensis P. Bartsch, 1915 - syn of: Seila alfredensis (P. Bartsch, 1915) - (CERITHIOPSIDAE)
- alfredensis, Dinoplax gigas alfredensis P. Bartsch - (CHAETOPLEURIDAE)
- alfredensis, Leptothyra alfredensis P. Bartsch, 1915 - syn of: Parviturbo alfredensis P. Bartsch, 1915 - (COLLONIIDAE)
- alfredensis, Cumia alfredensis (P. Bartsch, 1915) - (COLUBRARIIDAE)
- alfredensis, Anachis kraussii alfredensis (P. Bartsch, 1915) - (COLUMBELLIDAE)
- alfredensis, Warrana alfredensis (P. Bartsch, 1915) - (CONDYLOCARDIIDAE)
- alfredensis, Carditopsis alfredensis P. Bartsch, 1915 - syn of: Warrana alfredensis (P. Bartsch, 1915) - (CONDYLOCARDIIDAE)
- alfredensis, Conus alfredensis P. Bartsch, 1915 - syn of: Ketyconus tinianus (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- alfredensis, Vexillum alfredensis W.H. Turton, 1932 - syn of: Vexillum patulum (L.A. Reeve, 1845) - (COSTELLARIIDAE)
- alfredensis, Cypraeovula alfredensis (F.A. Schilder & M. Schilder, 1929) - (CYPRAEIDAE)
- alfredensis, Plesiocystiscus alfredensis (P. Bartsch, 1915) - (CYSTISCIDAE)
- alfredensis, Melanella alfredensis P. Bartsch, 1915 - (EULIMIDAE)
- alfredensis, Niso alfredensis P. Bartsch, 1915 - (EULIMIDAE)
- alfredensis, Kilburnia alfredensis (P. Bartsch, 1915) - (FASCIOLARIIDAE)
- alfredensis, Fusus alfredensis P. Bartsch, 1915 - syn of: Cumia alfredensis (P. Bartsch, 1915) - (FASCIOLARIIDAE)
- alfredensis, Haliotis alfredensis P. Bartsch, 1915 - syn of: Haliotis tuberculata speciosa (L.A. Reeve, 1846) - (HALIOTIDAE)
- alfredensis, Haminoea alfredensis (P. Bartsch, 1915) - (HAMINOEIDAE)
- alfredensis, Mactra alfredensis P. Bartsch, 1915 - syn of: Mactrotoma depressa (L. Spengler, 1802) - (MACTRIDAE)
- alfredensis, Marginella alfredensis P. Bartsch, 1915 - syn of: Plesiocystiscus alfredensis (P. Bartsch, 1915) - (MARGINELLIDAE)
- alfredensis, Granulina alfredensis P. Bartsch, 1915 - syn of: Plesiocystiscus alfredensis (P. Bartsch, 1915) - (MARGINELLIDAE)
- alfredensis, Pygmaepterys alfredensis (P. Bartsch, 1915) - (MURICIDAE)
- alfredensis, Favartia alfredensis (P. Bartsch, 1915) - (MURICIDAE)
- alfredensis, Murex alfredensis P. Bartsch, 1915 - syn of: Pygmaepterys alfredensis (P. Bartsch, 1915) - (MURICIDAE)
- alfredensis, Drupa alfredensis P. Bartsch, 1915 - syn of: Bedevina birileffi (C.E. Lischke, 1871) - (MURICIDAE)
- alfredensis, Crenella alfredensis P. Bartsch, 1915 - syn of: Solamen striatissima (G.B. III Sowerby, 1904) - (MYTILIDAE)
- alfredensis, Bullia alfredensis P. Bartsch, 1915 - (NASSARIIDAE)
- alfredensis, Natica alfredensis P. Bartsch, 1915 - syn of: Tectonatica tecta (H.E. Anton, 1838) - (NATICIDAE)
- alfredensis, Tricolia alfredensis W.H. Turton, 1932 - syn of: Tricolia elongata (C.F.F. von Krauss, 1848) - (PHASIANELLIDAE)
- alfredensis, Hochstetteria alfredensis P. Bartsch, 1915 - syn of: Neocardia angulata G.B. III Sowerby, 1892 - (PHILOBRYIDAE)
- alfredensis, Barnea alfredensis (P. Bartsch, 1915) - (PHOLADIDAE)
- alfredensis, Atrina alfredensis P. Bartsch, 1915 - syn of: Atrina squamifera (G.B. Sowerby, 1835) - (PINNIDAE)
- alfredensis, Orinella alfredensis (P. Bartsch, 1915) - (PYRAMIDELLIDAE)
- alfredensis, Charonia alfredensis P. Bartsch, 1915 - syn of: Charonia lampas (C. Linnaeus, 1758) - (RANELLIDAE)
- alfredensis, Philbertia alfredensis (W.H. Turton, 1932) - (RAPHITOMIDAE)
- alfredensis, Daphnella alfredensis P. Bartsch, 1915 - syn of: Daphnella capensis (G.B. III Sowerby, 1892) - (RAPHITOMIDAE)
- alfredensis, Onoba alfredensis (P. Bartsch, 1915) - (RISSOIDAE)
- alfredensis, Theora alfredensis P. Bartsch, 1915 - (SEMELIDAE)
- alfredensis, Parviturbo alfredensis P. Bartsch, 1915 - (SKENEIDAE)
- alfredensis, Solen alfredensis P. Bartsch, 1915 - syn of: Solen capensis P. Fischer, 1881 - (SOLENIDAE)
- alfredensis, Tellina alfredensis P. Bartsch, 1915 - (TELLINIDAE)
- alfredensis, Teredora alfredensis E.C.N. van Hoepen, 1941 - syn of: Teredora princesae (P.B. Sivickis, 1928) - (TEREDINIDAE)
- alfredensis, Thracia alfredensis P. Bartsch, 1915 - (THRACIIDAE)
- alfredensis, Cochliolepis alfredensis (P. Bartsch, 1915) - (TORNIDAE)
- alfredensis, Clanculus miniatus alfredensis P. Bartsch, 1915 - (TROCHIDAE)
- alfredensis, Roya alfredensis W.H. Turton, 1932 - (TYLODINIDAE)
- alfredensis, Ungulina alfredensis P. Bartsch, 1915 - syn of: Sphenia natalensis E.A. Smith, 1910 - (UNGULINIDAE)
- alfredensis, Anomalocardia alfredensis P. Bartsch, 1915 - syn of: Eumarcia paupercula (H.S. Holten, 1802) - (VENERIDAE)
- alfredensis, Circe alfredensis P. Bartsch, 1915 - syn of: Gafrarium alfredense (P. Bartsch, 1915) - (VENERIDAE)
- alfredensis simplex, Vexillum alfredensis simplex W.H. Turton, 1932 - syn of: Vexillum patulum (L.A. Reeve, 1845) - (COSTELLARIIDAE)
- alfredensis transkeiana, Cypraeovula alfredensis transkeiana F.Jr. Lorenz, 2002 - (CYPRAEIDAE)
- alfredi, Megalacron alfredi (J.C. Cox, 1871) - (CAMAENIDAE)
- alfredi, Pseudorhaphitoma alfredi (E.A. Smith, 1904) - (MANGELIIDAE)
- alfredi, Mangelia alfredi E.A. Smith, 1904 - syn of: Pseudorhaphitoma alfredi (E.A. Smith, 1904) - (MANGELIIDAE)
- alfredi, Cythara alfredi E.A. Smith, 1904 - syn of: Pseudorhaphitoma alfredi (E.A. Smith, 1904) - (MANGELIIDAE)
- alfredi, Phrixgnathus alfredi (H.H. Suter, 1909) - (PUNCTIDAE)
- alfredi, Laoma alfredi H.H. Suter, 1909 - syn of: Phrixgnathus alfredi (H.H. Suter, 1909) - (PUNCTIDAE)
- alfredi, Turbonilla alfredi R.T. Abbott, 1958 - (PYRAMIDELLIDAE)
- alfredi, Rissoina alfredi (E.A. Smith, 1904) - (RISSOINIDAE)
- alfredi barnaclei, Megalacron alfredi barnaclei (E.A. Smith, 1877) - (CAMAENIDAE)
- alfredoi, Idiostemma alfredoi S. Franke & A. Fernández Velázquez, 2007 - (UROCOPTIDAE)
- alfuricus, Nassarius alfuricus (H. Fischer in J. Wanner, 1927) - (NASSARIIDAE)
- alfuricus, Zeuxis alfuricus (H. Fischer in J. Wanner, 1927) - syn of: Nassarius alfuricus (H. Fischer in J. Wanner, 1927) - (NASSARIIDAE)
- alga, Leporicypraea mappa alga (G. Perry, 1811) - (CYPRAEIDAE)
- Algamorda, Subgenus Littorina (Algamorda) W.H. Dall, 1918 (LITTORINIDAE)
- alganus, Musculus alganus C.F. Laseron, 1956 - (MYTILIDAE)
- algarbiensis, Nerinella algarbiensis Choffat, 1901 † - (NERINELLIDAE) (FOSSIL)
- algarbiensis, Michiganites algarbiensis (Pruvost, 1914 †) - (PROLECANITIDA (UNASSIGNED)) (FOSSIL)
- Algaroda, syn of: Genus Littorina A.E.J. Férussac, 1822 (LITTORINIDAE)
- algarvensis, Oxychilus algarvensis É.A.A. Locard, 1899 - syn of: Oxychilus draparnaudi (H.H. Beck, 1837) - (OXYCHILIDAE)
- Algarvia, Genus Algarvia J.C. García-Gómez & J.L. Cervera, 1989 (FACELINIDAE)
- algazaliae, Volvarina algazaliae J.A. Ortea, 2014 - (MARGINELLIDAE)
- algena, Algerina algena Kríž, 2008 † - (SPANILIDAE) (FOSSIL)
- algens, Mastonia algens F.P. Jousseaume, 1898 - (TRIPHORIDAE)
- algerensis, Acicula algerensis E. Gittenberger & H.D. Boeters, 1977 - (ACICULIDAE)
- algeriana, Mitrolumna algeriana P.M. Pallary, 1900 - (MITROMORPHIDAE)
- algeriana, Alvania algeriana (T.A. de M. Monterosato, 1877) - (RISSOIDAE)
- algerianum, Cerithium algerianum G.B. II Sowerby, 1855 - syn of: Bittium lacteum (R.A. Philippi, 1836) - (CERITHIIDAE)
- algerianum, Epitonium algerianum (H.C. Weinkauff, 1866) - (EPITONIIDAE)
- algerianum, Parengonoceras algerianum Dubourdieu, 1953 † - (KNEMICERATIDAE) (FOSSIL)
- algerica, Ovatella algerica J.R. Bourguignat, 1864 - syn of: Myosotella myosotis (J.P.R. Draparnaud, 1801) - (ELLOBIIDAE)
- algerica, Melanopsis algerica P.M. Pallary, 1904 - (MELANOPSIDAE)
- algerica scalaris, Melanopsis algerica scalaris P.M. Pallary, 1904 - (MELANOPSIDAE)
- Algericeras, Genus Algericeras Spath , 1925 † (BRANCOCERATIDAE) (FOSSIL)
- algeriense, Newboldiceras algeriense J. Kennedy & A.S. Gale, 2017 † - (ACANTHOCERATIDAE) (FOSSIL)
- algeriensis, Pseudamnicola algeriensis P. Glöer, S. Bouzid & H.D. Boeters, 2010 - (HYDROBIIDAE)
- Algerina, Genus Algerina Kríž, 2008 † (SPANILIDAE) (FOSSIL)
- Algerites, Genus Algerites Mantell, 1822 † (ANISOCERATIDAE) (FOSSIL)
- algesirae, Chondrina algesirae W. Kobelt, 1882 - syn of: Chondrina calpica (C.A. Westerlund, 1872) - (CHONDRINIDAE)
- algesirae, Siphonaria pectinata algesirae (J.R.C. Quoy & J.P. Gaimard, 1834) - (SIPHONARIIDAE)
- algesirae depressa, Siphonaria algesirae depressa É.A.A. Locard, 1898 - syn of: Siphonaria pectinata (C. Linnaeus, 1758) - (SIPHONARIIDAE)
- algesirensis, Chiton algesirensis Angelo & S. Palazzi, 1989 - syn of: Leptochiton algesirensis (G. Capellini, 1859) - (CHITONIDAE)
- algesirensis, Leptochiton algesirensis (G. Capellini, 1859) - (LEPTOCHITONIDAE)
- algicola, Cerithium eburneum algicola C.B. Adams, 1845 - (CERITHIIDAE)
- algida, Nassa algida L.A. Reeve, 1853 - syn of: Nassarius algidus (L.A. Reeve, 1853) - (NASSARIIDAE)
- algida, Nassa algida E.A. Smith, 1901 - syn of: Nassarius fenwicki R.N. Kilburn, 1972 - (NASSARIIDAE)
- algida, Cryptonatica algida A.A. Gould, 1848 - syn of: Cryptonatica affinis (J.F. Gmelin, 1791) - (NATICIDAE)
- algida, Oliva oliva algida E.G. Vanatta, 1915 - (OLIVIDAE)
- algida, Onoba algida W.F. Ponder & H.W. Worsfold, 1994 - (RISSOIDAE)
- algida, Turritella algida J.C. Melvill & R. Standen, 1912 - (TURRITELLIDAE)
- algida chlora, Zeuxis algida chlora R.B. Watson, 1886 - syn of: Nassarius algidus (L.A. Reeve, 1853) - (NASSARIIDAE)
- algida chlora, Nassa algida chlora R.B. Watson, 1886 - syn of: Nassarius algidus (L.A. Reeve, 1853) - (NASSARIIDAE)
- algidus, Nassarius algidus (L.A. Reeve, 1853) - (NASSARIIDAE)
- algira, Patella algira G.P. Deshayes, 1840 - syn of: Cymbula safiana (J.B.P.A. Lamarck, 1819) - (PATELLIDAE)
- algira, Poiretia algira (J.G. Bruguière, 1792) - (SPIRAXIDAE)
- algira, Retinelloides algira L.W. Dillwyn, 1817 - syn of: Retinelloides incerta (J.P.R. Draparnaud, 1805) - (ZONITIDAE)
- algira mingrelica, Glandina algira mingrelica O. Böttger, 1881 - syn of: Poiretia mingrelica (O. Böttger, 1881) - (SPIRAXIDAE)
- algirae, Melanochlamys algirae (A. Adams in G.B. II Sowerby, 1850) - (AGLAJIDAE)
- algirae, Bulla algirae A. Adams in G.B. II Sowerby, 1850 - syn of: Melanochlamys algirae (A. Adams in G.B. II Sowerby, 1850) - (BULLIDAE)
- algirae, Smaragdinella algirae A. Adams in G.B. II Sowerby, 1850 - syn of: Melanochlamys algirae (A. Adams in G.B. II Sowerby, 1850) - (HAMINOEIDAE)
- algiroides, Helix algiroides A.E. Reuss in A.E. Reuss & Meyer, 1849 † - syn of: Miozonites algiroides (A.E. Reuss, 1849 †) - (HELICIDAE) (FOSSIL)
- algiroides, Miozonites algiroides (A.E. Reuss, 1849 †) - (ZONITIDAE) (FOSSIL)
- algiroides badensis, Miozonites algiroides badensis (Jooss, 1924 †) - (ZONITIDAE) (FOSSIL)
- algirus, Zonites algirus (C. Linnaeus, 1758) - (ZONITIDAE)
- algodoero, Africonus cuneolus algodoero (L.A. Reeve, 1844) - (CONIDAE)
- algoense, Epitonium algoense K.H.J. Thiele, 1925 - syn of: Epitonium emiliae (J.C. Melvill & R. Standen, 1903) - (EPITONIIDAE)
- algoense, Litharium algoense K.H.J. Thiele, 1925 - (TRIPHORIDAE)
- algoensis, Aesopus algoensis (G.B. III Sowerby, 1892) - (COLUMBELLIDAE)
- algoensis, Decipifus algoensis (K.H.J. Thiele, 1925) - (COLUMBELLIDAE)
- algoensis, Sciteconus algoensis (G.B. II Sowerby, 1834) - (CONIDAE)
- algoensis, Cylichna algoensis K.H.J. Thiele, 1925 - syn of: Cylichna tubulosa A.A. Gould, 1859 - (CYLICHNIDAE)
- algoensis, Cypraeovula algoensis (J.E. Gray, 1825) - (CYPRAEIDAE)
- algoensis, Erosaria acicularis algoensis unknown - (CYPRAEIDAE)
- algoensis, Crithe algoensis (E.A. Smith, 1901) - (CYSTISCIDAE)
- algoensis, Drillia algoensis K.H. Barnard, 1958 - syn of: Drillia erepta K.H. Barnard, 1969 - (DRILLIIDAE)
- algoensis, Eatoniella algoensis (K.H.J. Thiele, 1925) - (EATONIELLIDAE)
- algoensis, Melanella algoensis E.A. Smith, 1901 - (EULIMIDAE)
- algoensis, Marginella algoensis E.A. Smith, 1901 - syn of: Crithe algoensis (E.A. Smith, 1901) - (MARGINELLIDAE)
- algoensis, Granulina algoensis E.A. Smith, 1901 - syn of: Crithe algoensis (E.A. Smith, 1901) - (MARGINELLIDAE)
- algoensis, Ostrea algoensis G.B. II Sowerby, 1871 - (OSTREIDAE)
- algoensis, Pleurobranchaea algoensis K.H.J. Thiele, 1925 - (PLEUROBRANCHAEIDAE)
- algoensis, Megastomia algoensis (K.H.J. Thiele, 1925) - (PYRAMIDELLIDAE)
- algoensis, Fusitriton algoensis J.R. le B. Tomlin, 1947 - syn of: Fusitriton murrayi (E.A. Smith, 1891) - (RANELLIDAE)
- algoensis, Thesbia algoensis K.H.J. Thiele, 1925 - syn of: Decipifus algoensis (K.H.J. Thiele, 1925) - (RAPHITOMIDAE)
- algoensis, Rissoa algoensis K.H.J. Thiele, 1925 - syn of: Eatoniella algoensis (K.H.J. Thiele, 1925) - (RISSOIDAE)
- algoensis, Solariella algoensis K.H.J. Thiele, 1925 - syn of: Pseudominolia articulata (A.A. Gould, 1861) - (SOLARIELLIDAE)
- algoensis agulhasi, Conus algoensis agulhasi H.E. Coomans, R.G. Moolenbeek & E. Wils, 1980 - syn of: Sciteconus algoensis (G.B. II Sowerby, 1834) - (CONIDAE)
- algoensis batsatensis, Cypraea algoensis batsatensis F.L. Bodoni, 1985 - syn of: Cypraeovula algoensis (J.E. Gray, 1825) - (CYPRAEIDAE)
- algoensis bettyensis, Cypraeovula algoensis bettyensis F.Jr. Lorenz, 2002 - (CYPRAEIDAE)
- algoensis namibiensis, Cypraeovula algoensis namibiensis W. Massier, 2006 - (CYPRAEIDAE)
- algoensis norpothi, Sciteconus algoensis norpothi F.Jr. Lorenz, 2015 - (CONIDAE)
- algoensis permarginata, Cypraeovula algoensis permarginata F.Jr. Lorenz, 1989 - (CYPRAEIDAE)
- algoensis sanfrancisca, Cypraeovula algoensis sanfrancisca M. Chiapponi, 1999 - syn of: Cypraeovula algoensis (J.E. Gray, 1825) - (CYPRAEIDAE)
- algoensis scitulus, Sciteconus algoensis scitulus (L.A. Reeve, 1849) - (CONIDAE)
- algoensis simplex, Sciteconus algoensis simplex (G.B. II Sowerby, 1858) - (CONIDAE)
- algoidea, Lacuna algoidea P.M. Pallary, 1912 - syn of: Tricolia algoidea (P.M. Pallary, 1920) - (LITTORINIDAE)
- algoidea, Tricolia algoidea (P.M. Pallary, 1920) - (PHASIANELLIDAE)
- algoideum, Cerithium punicum algoideum W. Kobelt, 1908 - (CERITHIIDAE)
- Algomella, Genus Algomella Valkov & Karlova, 1984 † (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- algonquinensis, Webbhelix multilineata algonquinensis (W.A. Nason, 1906) - (POLYGYRIDAE)
- algonviense, Bythiospeum algonviense (D. Uhl, 1934) - (HYDROBIIDAE)
- algonviensis, Lartetia algonviensis D. Uhl, 1934 - syn of: Bythiospeum algonviense (D. Uhl, 1934) - (MOITESSIERIIDAE)
- algosus, Semimytilus algosus (Gould, 1850) - (MYTILIDAE)
- algoviana, Truncatellina algoviana Colling & Karle-Fendt, 2016 - (VERTIGINIDAE)
- algovianum, Arieticeras algovianum (Oppel, 1862 †) - (HILDOCERATIDAE) (FOSSIL)
- Algrus, syn of: Genus Pollia J.E. Gray in G.B. Sowerby, 1834 (BUCCINIDAE)
- alhambrae, Ortizius alhambrae C.A. Westerlund, 1886 - syn of: Ortizius rateranus (G. Servain, 1880) - (OXYCHILIDAE)
- alhenae, Kankelibranchus alhenae J.A. Ortea, J. Espinosa & L. Moro, 2009 - (POLYCERIDAE)
- alhiensis, Limicolaria alhiensis H.B. Preston, 1912 - (ACHATINIDAE)
- ali, Prosphingites ali Arthaber 1911 † - (MELAGATHICERATIDAE) (FOSSIL)
- alia, Hawaiarca alia W.H. Dall & al., 1938 - (ARCIDAE)
- Alia, Genus Alia H. Adams & A. Adams, 1853 (COLUMBELLIDAE)
- alia, Promathildia alia F. Haas, 1953 † - (GORDENELLIDAE) (FOSSIL)
- alia, Phyllidia alia N. Yonow, 1984 - syn of: Phyllidia varicosa J.B.P.A. Lamarck, 1801 - (PHYLLIDIIDAE)
- alia, Odostomia alia A. Peñas & E. Rolán, 1999 - (PYRAMIDELLIDAE)
- aliabadensis, Risselloidea aliabadensis A. Nützel & Senowbari-Daryan, 1999 † - (EUCYCLIDAE) (FOSSIL)
- aliae, Laevichlamys aliae (H.H. Dijkstra, 1988) - (PECTINIDAE)
- aliatahani, Oxychilus aliatahani F. Riedel, 1984 - (OXYCHILIDAE)
- alibamasiana, Micrancilla alibamasiana J.M. Pacaud, D. Merle & Pons, 2013 † - (ANCILLARIIDAE) (FOSSIL)
- alibashiensis, Abichites alibashiensis W. Korn & Ghaderi, 2015 † - (DZHULFITIDAE) (FOSSIL)
- Alibashites, Genus Alibashites Korn & Ghaderi, 2015 † (DZHULFITIDAE) (FOSSIL)
- alibotushensis, Alinda biplicata alibotushensis I. Dedov, 2009 - (CLAUSILIIDAE)
- alicae, Egilina alicae (A. Hornung & G. Mermod, 1924) - (PYRAMIDELLIDAE)
- alicea, Systrophia alicea (R.J.L. Guppy, 1871) - (SCOLODONTIDAE)
- aliceae, Sitala aliceae K.C. Emberton & T.A. Pearce, 2000 - (ARIOPHANTIDAE)
- aliceae, Anachis aliceae (P.M. Pallary, 1900) - (COLUMBELLIDAE)
- aliceae, Lyncina aliceae P.T.M. Lum, 2013 - (CYPRAEIDAE)
- aliceae, Volvarina aliceae J. Espinosa & J.A. Ortea, 2012 - (MARGINELLIDAE)
- aliceae, Favartia aliceae (E.J. Petuch, 1987) - (MURICIDAE)
- aliceae, Muricopsis aliceae E.J. Petuch, 1987 - syn of: Favartia aliceae (E.J. Petuch, 1987) - (MURICIDAE)
- aliceae, Eumetula aliceae (P. Dautzenberg & H. Fischer, 1896) - (NEWTONIELLIDAE)
- aliceae, Alvania aliceae B. Amati, 2014 - (RISSOIDAE)
- alicei, Brachioteuthis alicei L.M.A.O.E. Joubin, 1900 - syn of: Brachioteuthis riisei (J.J.S. Steenstrup, 1882) - (BRACHIOTEUTHIDAE)
- alicei, Buccinum alicei P. Dautzenberg & H. Fischer, 1912 - syn of: Buccinum nivale H.B.S. Friele, 1882 - (BUCCINIDAE)
- alicei, Lischkeia alicei (P. Dautzenberg & H. Fischer, 1896) - (CALLIOTROPIDAE)
- alicei, Profundisepta alicei (P. Dautzenberg & H. Fischer, 1897) - (FISSURELLIDAE)
- alicei, Pseudamussium alicei (P. Dautzenberg & H. Fischer, 1897) - (PECTINIDAE)
- Aliceia, Genus Aliceia P. Dautzenberg & H. Fischer, 1897 (RAPHITOMIDAE)
- alicetandiasae, Amphidromus alicetandiasae Parsons, 2016 - (CAMAENIDAE)
- Alicia, syn of: Genus Thraciopsis R. Tate & W.L. May, 1900 (THRACIIDAE)
- aliciae, Philinopsis aliciae T.M. Gosliner, 2015 - (AGLAJIDAE)
- aliciae, Etrema aliciae (J.C. Melvill & R. Standen, 1895) - (CLATHURELLIDAE)
- aliciae, Etrema aliciae C. Hedley, 1909 - syn of: Etrema labiosa C. Hedley, 1922 - (CLATHURELLIDAE)
- aliciae, Glyphostoma aliciae J.C. Melvill & R. Standen, 1895 - syn of: Etrema aliciae (J.C. Melvill & R. Standen, 1895) - (CLATHURELLIDAE)
- aliciae, Aesopus aliciae L.N. Marincovich, 1973 - (COLUMBELLIDAE)
- aliciae, Latouchella aliciae P. Brock, 1998 † - syn of: Dorispira aliciae (P. Brock, 1998 †) - (COREOSPIRIDAE) (FOSSIL)
- aliciae, Montereina aliciae B. Dayrat, 2010 - (DISCODORIDIDAE)
- aliciae, Mangelia aliciae J.C. Melvill & R. Standen, 1895 - syn of: Etrema aliciae (J.C. Melvill & R. Standen, 1895) - (MANGELIIDAE)
- aliciae, Mangilia aliciae C. Hedley, 1909 - syn of: Etrema labiosa C. Hedley, 1922 - (MANGELIIDAE)
- aliciae, Mitra aliciae G.T. Poppe, S.P. Tagaro & R. Salisbury, 2009 - (MITRIDAE)
- aliciae, Quoiecchia aliciae Crickmay, 1930 † - (MYOPHORELLIDAE) (FOSSIL)
- aliciae, Glyptophysa aliciae (L.A. Reeve, 1862) - (PLANORBIDAE)
- aliciae, Stenotrema monodon aliciae (H.A. Pilsbry, 1893) - (POLYGYRIDAE)
- aliciae, Rissoella aliciae J. Espinosa & J.A. Ortea, 2009 - (RISSOELLIDAE)
- aliciae, Dorispira aliciae (P. Brock, 1998 †) - (RUGAECONIDAE) (FOSSIL)
- aliciae, Sunetta aliciae A. Adams & G.F. Angas, 1864 - syn of: Sunetta vaginalis (K.T. Menke, 1843) - (VENERIDAE)
- aliciae minor, Etrema aliciae minor (J.L. Bouge & P. Dautzenberg, 1914) - (CLATHURELLIDAE)
- aliciae tenera, Etrema aliciae tenera C. Hedley, 1899 - syn of: Etrema tenera (C. Hedley, 1899) - (CLATHURELLIDAE)
- aliciae ustulata, Etrema aliciae ustulata (J.L. Bouge & P. Dautzenberg, 1914) - (CLATHURELLIDAE)
- Alicula, syn of: Genus Aliculastrum H.A. Pilsbry, 1896 (HAMINOEIDAE)
- Alicula, Genus Alicula Eichwald, 1830 † (SCAPHANDRIDAE) (FOSSIL)
- Aliculastrum, Genus Aliculastrum H.A. Pilsbry, 1896 (HAMINOEIDAE)
- aliculum, Trigoniocardia aliculum W.H. Dall, 1900 † - (CARDIIDAE) (FOSSIL)
- alicunda, Amplirhagada alicunda F. Köhler, 2011 - (CAMAENIDAE)
- alicurensis, Hyalocornea alicurensis (L. Benoit, 1857) - (OXYCHILIDAE)
- alida, Raphitoma alida F. Pusateri & R. Giannuzzi-Savelli, 2016 - (RAPHITOMIDAE)
- alidotum, Epitonium alidotum W.P. Woodring, 1928 † - (EPITONIIDAE) (FOSSIL)
- alidrisi, Doto alidrisi J.A. Ortea, L. Moro & A. Ocaña, 2010 - (DOTIDAE)
- alidrisii, Mimimitoceras alidrisii W. Korn, Bockwinkel & Ebbighausen, 2015 † - (PRIONOCERATIDAE) (FOSSIL)
- aliena, Anadara aliena (T. Iredale, 1939) - (ARCIDAE)
- aliena, Venericardia aliena G.P. Deshayes † - (CARDITIDAE) (FOSSIL)
- aliena, Papillifera aliena T.A. de M. Monterosato, 1892 - syn of: Papillifera bidens (C. Linnaeus, 1758) - (CLAUSILIIDAE)
- aliena, Cypraea aliena F.A. Schilder, 1939 - syn of: Erosaria acicularis (J.F. Gmelin, 1791) - (CYPRAEIDAE)
- aliena, Indoennea aliena (A.R.J.B. Bavay & P. Dautzenberg, 1912) - (DIAPHERIDAE)
- aliena, Valletia aliena Pocta, 1889 † - syn of: Monopleura aliena Poèta † - (DICERATIDAE) (FOSSIL)
- aliena, Conopleura aliena C. Smriglio, P. Mariottini & Calascibetta, 1999 - (DRILLIIDAE)
- aliena, Sanhaliotis aliena T. Iredale, 1929 - syn of: Haliotis varia C. Linnaeus, 1758 - (HALIOTIDAE)
- aliena, Monopleura aliena Poèta † - (MONOPLEURIDAE) (FOSSIL)
- aliena, Morphotropis aliena J. Perner, 1903 † - (ORIOSTOMATIDAE) (FOSSIL)
- aliena, Taranis aliena (J. Marwick, 1965 †) - (RAPHITOMIDAE) (FOSSIL)
- aliena, Cincinna aliena C.A. Westerlund, 1877 - (VALVATIDAE)
- aliena, Macromargarya aliena Ying, Fürsich & D.H. Schneider, 2013 † - (VIVIPARIDAE) (FOSSIL)
- aliena brevicula, Cincinna aliena brevicula (Kozhov, 1936) - (VALVATIDAE)
- aliena brevicula, Cincinna aliena brevicula Kozhov, 1936 - syn of: Cincinna aliena brevicula (Kozhov, 1936) - (VALVATIDAE)
- aliena sorensis, Cincinna aliena sorensis W. Dybowski, 1886 - syn of: Cincinna sorensis (W. Dybowski, 1886) - (VALVATIDAE)
- alienigena, Alaria alienigena W.H. Hudleston, 1888 † - (APORRHAIDAE) (FOSSIL)
- alienigena, Pusula alienigena F.A. Schilder, 1928 † - (TRIVIIDAE) (FOSSIL)
- alienigenus, Unio alienigenus J.C.H. Crosse & P.H. Fischer, 1894 - syn of: Cyrtonaias umbrosa (I. Lea, 1856) - (UNIONIDAE)
- Alienitor, syn of: Genus Zonitoides R. Lehmann, 1862 (GASTRODONTIDAE)
- alienocurta, Rissoa alienocurta P. Lozouet, 1998 † - (RISSOIDAE) (FOSSIL)
- alienopriscus, Fusulculus alienopriscus J.M. Pacaud & Tracey, 2000 † - (BENTHOBIIDAE) (FOSSIL)
- aliense, Hamiticeras aliense Lobjanidze, 1972 † - (ANCYLOCERATIDAE) (FOSSIL)
- aliense, Carbactinoceras aliense C. Chen, 1981 † - (CARBACTINOCERATIDAE) (FOSSIL)
- alienum, Pseudolioceras alienum Dagis, 1967 † - (HILDOCERATIDAE) (FOSSIL)
- alienus, Gyraulus alienus (H. Rolle, 1862) - (PLANORBIDAE)
- alifaensis, Helix alifaensis M. Paulucci, 1881 - syn of: Campylaea planospira (J.B.P.A. Lamarck, 1822) - (HELICIDAE)
- alifera, Platygervillaria alifera Repin, 2008 † - (BAKEVELLIIDAE) (FOSSIL)
- alifera, Hoplopteron alifera (K.H.J. Thiele, 1925) - (EULIMIDAE)
- aliforme, Cardium aliforme J. de C. Sowerby, 1815 † - syn of: Conocardium aliforme (J. de C. Sowerby, 1815 †) - (CARDIIDAE) (FOSSIL)
- aliforme, Conocardium aliforme (J. de C. Sowerby, 1815 †) - (CONOCARDIIDAE) (FOSSIL)
- aliformis, Pterotrigonia aliformis (Parkinson †) - (PTEROTRIGONIIDAE) (FOSSIL)
- aliformis attenuata, Pterotrigonia aliformis attenuata J. Lycett, 1875 † - (PTEROTRIGONIIDAE) (FOSSIL)
- aligamenta, Bryopa aligamenta B.S. Morton, 2005 - (CLAVAGELLIDAE)
- aligator, Phalium aligator E.J. Petuch, 1991 † - (CASSIDAE) (FOSSIL)
- Aligena, Genus Aligena I. Lea, 1843 (LASAEIDAE)
- aliger, Euomphalopterus aliger J. Perner, 1903 † - (EUOMPHALIDAE) (FOSSIL)
- aliger, Hyolithes aliger Resser & Endo, 1937 † - (HYOLITHIDAE) (FOSSIL)
- Aliger, syn of: Genus Lobatus W.J. Swainson, 1837 (STROMBIDAE)
- Aliger, syn of: Genus Lobatus W.J. Swainson, 1837 (STROMBIDAE)
- aligera, Limatulella aligera Kalishevich, 1981 † - (LIMIDAE) (FOSSIL)
- aligera, Lepidodesma aligera (P.M. Heude, 1877) - (UNIONIDAE)
- aliguayensis, Tristichotrochus aculeatus aliguayensis G.T. Poppe, S.P. Tagaro & H. Dekker, 2006 - (CALLIOSTOMATIDAE)
- aliguayensis, Scalptia aliguayensis A. Verhecken, 2008 - (CANCELLARIIDAE)
- aliguayensis, Ficadusta pulchella aliguayensis J. Van Heesvelde & J. Deprez, 2002 - (CYPRAEIDAE)
- aliguayensis, Dentimargo aliguayensis L. Bozzetti, 2017 - (MARGINELLIDAE)
- aliguayensis, Oliva aliguayensis G.T. Poppe, 2005 - syn of: Recourtoliva poppei (D.M. Sargent & E.J. Petuch, 2008) - (OLIVIDAE)
- aliguayensis, Terebra aliguayensis Unknown - syn of: Cinguloterebra cumingii (G.P. Deshayes, 1857) - (TEREBRIDAE)
- alii, Vermetus alii J.A. Hadfield & E.A. Kay, 1972 - (VERMETIDAE)
- alimbeti, Paragastrioceras alimbeti Ruzhentsev, 1956 † - (PARAGASTRIOCERATIDAE) (FOSSIL)
- alimbetus, Devonocheilus alimbetus P.A. Zhuravleva, 1972 † - syn of: Devonocheilus timanicus (Holzapfel, 1899 †) - (ARCHIACOCERATIDAE) (FOSSIL)
- alimovi, Arsenievinaia alimovi V.V. Bogatov & F. Zatrawkin, 1988 - syn of: Sinanodonta woodiana (I. Lea, 1834) - (UNIONIDAE)
- Alina, syn of: Subgenus Neritina (Clypeolum) C.A. Récluz, 1842 (NERITIDAE)
- alinae, Digenuoceras alinae (Barrande, 1866 †) - (ONCOCERATIDAE) (FOSSIL)
- alinae, Cyrtoceras alinae Barrande, 1866 † - syn of: Digenuoceras alinae (Barrande, 1866 †) - (ONCOCERIDA (unassigned)) (FOSSIL)
- alinae, Palaeozygopleura alinae (J. Perner, 1907 †) - (PALAEOZYGOPLEURIDAE) (FOSSIL)
- alinae, Acharax alinae B. Métivier & R. von Cosel, 1993 - (SOLEMYIDAE)
- alinae, Zygopleura alinae J. Perner, 1907 † - syn of: Palaeozygopleura alinae (J. Perner, 1907 †) - (ZYGOPLEURIDAE) (FOSSIL)
- alinae planicostata, Palaeozygopleura alinae planicostata Horný, 1955 † - (PALAEOZYGOPLEURIDAE) (FOSSIL)
- alincia, Eurytellina alincia W.P. Woodring, 1982 † - (TELLINIDAE) (FOSSIL)
- Alinda, Genus Alinda H. Adams & A. Adams, 1855 (CLAUSILIIDAE)
- Alinoclithon, Subgenus Theodoxus (Alinoclithon) F.C. Baker, 1923 (NERITIDAE)
- Aliodonax, Subgenus Notodonax (Aliodonax) Saul, 1989 (DONACIDAE) (FOSSIL)
- Aliofusus, Genus Aliofusus Stephenson , 1941 † (BUCCINIDAE) (FOSSIL)
- Aliomactra, Genus Aliomactra Stephenson, 1953 † (MACTRIDAE) (FOSSIL)
- aliostoma, Helix aliostoma C.A. Westerlund, 1898 - syn of: Shileykoia daghestana (W. Kobelt, 1877) - (HELICIDAE)
- Alipta, Genus Alipta H.J. Finlay, 1927 (CERITHIOPSIDAE)
- Aliptina, Genus Aliptina B.A. Marshall, 1978 (CERITHIOPSIDAE)
- Alipurpura, syn of: Subgenus Pterynotus (Pterochelus) F.P. Jousseaume, 1880 (MURICIDAE)
- aliquando, Trivellona aliquando D. Fehse, 2015 - (TRIVIIDAE)
- aliquanta, Odostomia aliquanta A. Peñas & E. Rolán, 1999 - (PYRAMIDELLIDAE)
- aliquantulus, Vokesimurex aliquantulus R. Houart & V. Héros, 2015 - (MURICIDAE)
- alis, Antalis alis V. Scarabino, 2008 - (DENTALIIDAE)
- alis, Alucinoma alis R. von Cosel & P. Bouchet, 2008 - (LUCINIDAE)
- alis, Leptotrophon alis R. Houart, 2001 - (MURICIDAE)
- alis, Mipus alis M. Oliverio, 2008 - (MURICIDAE)
- alis, Pectinodonta alis B. A. Marshall, Puillandre, Lambourdière, Couloux & Samadi, 2016 - (PECTINODONTIDAE)
- alisae, Rostanga alisae A.V. Martynov, 2003 - (DISCODORIDIDAE)
- alisae, Chryseofusus alisae R. Hadorn & K. Fraussen, 2003 - (FASCIOLARIIDAE)
- alisae, Dentimargo alisae F. Boyer, 2001 - (MARGINELLIDAE)
- alisi, Calliostoma alisi B.A. Marshall, 1995 - (CALLIOSTOMATIDAE)
- alisi, Conasprella alisi (R.G. Moolenbeek, D. Röckel & G. Richard, 1995) - (CONIDAE)
- alisi, Rhizoconus alisi R.G. Moolenbeek, D. Röckel & G. Richard, 1995 - syn of: Conasprella alisi (R.G. Moolenbeek, D. Röckel & G. Richard, 1995) - (CONIDAE)
- alisi, Boucheticonus alisi (R.G. Moolenbeek, D. Röckel & G. Richard, 1995) - syn of: Conasprella alisi (R.G. Moolenbeek, D. Röckel & G. Richard, 1995) - (CONIDAE)
- alisi, Terebra alisi U. Aubry, 1999 - (TEREBRIDAE)
- alisiense, Acanthopleuroceras alisiense (Reynès in Haug, 1885 †) - (POLYMORPHITIDAE) (FOSSIL)
- alisiensis, Sulcomitrella alisiensis K. Monsecour & D. Monsecour, 2016 - (COLUMBELLIDAE)
- Alisimitra, Genus Alisimitra Fedosov, Herrmann & Bouchet, 2017 (COSTELLARIIDAE)
- alisoensis, Laternula alisoensis A. Packard, 1922 † - (LATERNULIDAE) (FOSSIL)
- alisonae, Notoplax alisonae (P. Kaas, 1976 ex R. Winckworth MS) - (ACANTHOCHITONIDAE)
- alisonae, Chelidonura alisonae T.M. Gosliner, 2011 - (AGLAJIDAE)
- alisonae, Mitrella alisonae (J.C. Melvill & R. Standen, 1901) - syn of: Mitrella alizonae (J.C. Melvill & R. Standen, 1901) - (COLUMBELLIDAE)
- alisonae, Talostolida alisonae C.M. Burgess, 1983 - syn of: Talostolida pellucens alisonae C.M. Burgess, 1983 - (CYPRAEIDAE)
- alisonae, Cypraea alisonae C.M. Burgess, 1983 - syn of: Talostolida pellucens (J.C. Melvill, 1888) - (CYPRAEIDAE)
- alisonae, Talostolida pellucens alisonae C.M. Burgess, 1983 - (CYPRAEIDAE)
- alisonae, Jorunna alisonae Ev. Marcus, 1976 - (DISCODORIDIDAE)
- alisonae, Chryseofusus alisonae (R. Hadorn, M.A. Snyder & K. Fraussen, 2008) - (FASCIOLARIIDAE)
- alisonae, Fusinus alisonae R. Hadorn, M.A. Snyder & K. Fraussen, 2008 - syn of: Chryseofusus alisonae (R. Hadorn, M.A. Snyder & K. Fraussen, 2008) - (FASCIOLARIIDAE)
- alisonae, Flabellina alisonae T.M. Gosliner, 1980, 1979 - syn of: Flabellina bicolor (E.F. Kelaart, 1858) - (FLABELLINIDAE)
- alisonae, Demissa alisonae F. Boyer, 2016 - (MARGINELLIDAE)
- alisonae, Sansonia alisonae J. Le Renard & P. Bouchet, 2003 - (PICKWORTHIIDAE)
- alisoni, Notopala sublineata alisoni (J.W. Brazier, 1879) - (VIVIPARIDAE)
- alisonkayae, Carinapex alisonkayae S.G. Wiedrick, 2015 - (HORAICLAVIDAE)
- alistairi, Amaea alistairi H.P. Wagner, 1990 - (EPITONIIDAE)
- alisulcatum, Eurydesma alisulcatum C.O. Waterhouse, 1987 † - (EURYDESMATIDAE) (FOSSIL)
- alitakensis, Propebela alitakensis (W.H. Dall, 1919) - (MANGELIIDAE)
- alitakensis, Lora alitakensis W.H. Dall, 1919 - syn of: Propebela alitakensis (W.H. Dall, 1919) - (TURRIDAE)
- aliter, Megastomia aliter A. Peñas & E. Rolán, 1999 - (PYRAMIDELLIDAE)
- alitis, Maitaia alitis Astafieva, 1989 † - syn of: Praekolymia alitis (Astafieva, 1989 †) - (ATOMODESMATIDAE) (FOSSIL)
- alitis, Praekolymia alitis (Astafieva, 1989 †) - (KOLYMIIDAE) (FOSSIL)
- alius, Goniobranchus alius (W.B. Rudman, 1987) - (CHROMODORIDIDAE)
- aliusrubens, Rostanga aliusrubens W.B. Rudman & G.J. Avern, 1989 - (DISCODORIDIDAE)
- aliwalensis, Leporicypraea rosea aliwalensis F.Jr. Lorenz, 2002 - (CYPRAEIDAE)
- aliwalensis, Marginella aliwalensis S.G. Veldsman, 2013 - (MARGINELLIDAE)
- alixae, Trochulus alixae J.R. Bourguignat in É.A.A. Locard, 1894 - syn of: Trichia hispida (C. Linnaeus, 1758) - (HYGROMIIDAE)
- alizonae, Mitrella alizonae (J.C. Melvill & R. Standen, 1901) - (COLUMBELLIDAE)
- alizonum, Epitonium alizonum (J.C. Melvill, 1912) - (EPITONIIDAE)
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