- ciofaldoi, Murella muralis ciofaldoi (C. Cafici, 1885) - (HELICIDAE)
- ciofali, Sassia ciofali (Gregorio, 1880 †) - (RANELLIDAE) (FOSSIL)
- ciofaloi, Helix ciofaloi C. Cafici, 1885 - syn of: Murella muralis ciofaldoi (C. Cafici, 1885) - (HELICIDAE)
- ciommeii, Ringicula ciommeii P. Mariottini, C. Smriglio & M. Oliverio, 2000 - (RINGICULIDAE)
- Cionella, syn of: Genus Cochlicopa A.E.J. Férussac in A. Risso, 1826 (COCHLICOPIDAE)
- cionella, Vitreolina cionella (T.A. de M. Monterosato, 1878) - (EULIMIDAE)
- cionella, Holospira cionella H.A. Pilsbry, 1905 - (UROCOPTIDAE)
- cionella capillacea, Holospira cionella capillacea H.A. Pilsbry & J.H. Ferriss, 1905 - (UROCOPTIDAE)
- CIONELLIDAE - syn of Family: COCHLICOPIDAE
- cionelloides, Odostomia cionelloides S. Clessin, 1902 - (PYRAMIDELLIDAE)
- Cioniscus, syn of: Genus Graphis J.G. Jeffreys, 1867 (TOFANELLIDAE)
- cioniscus, Centralia cioniscus (C. de la Torre, 1911) - (UROCOPTIDAE)
- cioppii, Alvania cioppii C. Chirli, 2006 † - (RISSOIDAE) (FOSSIL)
- cipangense, Vasticardium elongatum cipangense (E. Vidal, 1993) - (CARDIIDAE)
- cipangoana, Venericardia cipangoana M. Yokoyama, 1920 - syn of: Megacardita ferruginosa (A. Adams & L.A. Reeve, 1850) - (CARDITIDAE)
- cipangoana, Megacardita cipangoana M. Yokoyama, 1920 - syn of: Megacardita ferruginosa (A. Adams & L.A. Reeve, 1850) - (CARDITIDAE)
- cipangoanum, Calliostoma shinagawaense cipangoanum M. Yokoyama, 1920 - (CALLIOSTOMATIDAE)
- Cipangochalax, syn of: Genus Cipangocharax Shintaro, 1934 (CYCLOPHORIDAE)
- Cipangocharax, Genus Cipangocharax Shintaro, 1934 (CYCLOPHORIDAE)
- Cipangopaludina, Genus Cipangopaludina H.B. Hannibal, 1912 (VIVIPARIDAE)
- cipitis, Crassatella cipitis Berezovsky † - (CRASSATELLIDAE) (FOSSIL)
- cipitis curtus, Crassatella cipitis curtus Berezovsky - (CRASSATELLIDAE)
- Cipliacella, Subgenus Chama (Cipliacella) Vincent, 1928 † (CHAMIDAE) (FOSSIL)
- ciplyense, Veniella ciplyense (Ryckholt, 1854 †) - (VENIELLIDAE) (FOSSIL)
- ciplyensis, Rostarca ciplyensis (Vincent 1930) † - (ARCIDAE) (FOSSIL)
- ciplyensis, Orthochetus ciplyensis Vincent, 1930 † - (CERITHIIDAE) (FOSSIL)
- Cipraea, syn of: Genus Cypraea C. Linnaeus, 1758 (CYPRAEIDAE)
- cipraeaeformis, Zittelia cipraeaeformis C. Gemmellaro, 1869 † - (COLOMBELLINIDAE) (FOSSIL)
- circa, Bittium circa D. Moreno, 2006 - (CERITHIIDAE)
- circae, Conus circae G.B. II Sowerby, 1858 - syn of: Pionoconus magus (C. Linnaeus, 1758) - (CONIDAE)
- circassica, Baleopsina circassica (O. Böttger, 1888) - (CLAUSILIIDAE)
- circassica, Acrotomina semicincta circassica (O.W. Von Rosen, 1901) - (CLAUSILIIDAE)
- circassica, Helix circassica J.G.F. de Charpentier in A. Mousson, 1863 - syn of: Circassina frutis circassica (J.G.F. de Charpentier in A. Mousson, 1863) - (HELICIDAE)
- circassica, Circassina circassica J.G.F. de Charpentier in A. Mousson, 1863 - syn of: Circassina frutis circassica (J.G.F. de Charpentier in A. Mousson, 1863) - (HYGROMIIDAE)
- circassica, Circassina frutis circassica (J.G.F. de Charpentier in A. Mousson, 1863) - (HYGROMIIDAE)
- circassica akramowskii, Circassina circassica akramowskii A.A. Schileyko, 1972 - syn of: Circassina frutis akramowskii A.A. Schileyko, 1972 - (HYGROMIIDAE)
- circassica claviformis, Clausilia circassica claviformis O.W. Von Rosen, 1914 - syn of: Baleopsina circassica (O. Böttger, 1888) - (CLAUSILIIDAE)
- circassica rudis, Helix circassica rudis O. von Retowski, 1889 - syn of: Circassina frutis (L. Pfeiffer, 1859) - (HELICIDAE)
- circassica saltuensis, Baleopsina circassica saltuensis (O.W. Von Rosen, 1914) - (CLAUSILIIDAE)
- circassica simpla, Circassina circassica simpla A.A. Schileyko, 1972 - syn of: Circassina frutis veselyi (Z. Frankenberger, 1919) - (HYGROMIIDAE)
- Circassina, Genus Circassina P. Hesse, 1921 (HYGROMIIDAE)
- circe, Straparella circe Billings, 1860 † - syn of: Straparollina circe (Billings, 1860 †) - (ANOMPHALIDAE) (FOSSIL)
- circe, Calocochlia zonifera circe L. Pfeiffer, 1853 - (BRADYBAENIDAE)
- circe, Paupospira circe (Billings, 1857 †) - (LOPHOSPIRIDAE) (FOSSIL)
- circe, Kobayashiella circe (Walcott, 1905 †) - (ONYCHOCHILIDAE) (FOSSIL)
- circe, Gari circe (O.A.L. Mörch, 1876) - (PSAMMOBIIDAE)
- circe, Psammobia circe O.A.L. Mörch, 1876 - syn of: Gari circe (O.A.L. Mörch, 1876) - (PSAMMOBIIDAE)
- circe, Straparollina circe (Billings, 1860 †) - (STRAPAROLLINIDAE) (FOSSIL)
- Circe, Genus Circe H.C.F. Schumacher, 1817 (VENERIDAE)
- circeja, Marmorana serpentina circeja (W. Kobelt, 1903) - (HELICIDAE)
- circellata, Acanthochitona circellata (A. Adams & L.A. Reeve, 1847) - (ACANTHOCHITONIDAE)
- circellus, Sanyangites circellus Zheng & X.T. Ma, 1982 † - (ARAXOCERATIDAE) (FOSSIL)
- Circenita, Subgenus Gouldia (Circenita) F.P. Jousseaume, 1888 (VENERIDAE)
- Circentia, syn of: Subgenus Gouldia (Circenita) F.P. Jousseaume, 1888 (VENERIDAE)
- circercula, Pustularia circercula C. Linnaeus, 1758 - syn of: Pustularia cicercula (C. Linnaeus, 1758) - (CYPRAEIDAE)
- circillata, Acanthochitona circillata A. Adams & L.A. Reeve, 1847 - syn of: Acanthochitona circellata (A. Adams & L.A. Reeve, 1847) - (ACANTHOCHITONIDAE)
- circillatus, Chiton circillatus A. Adams & L.A. Reeve, 1847 - syn of: Acanthochitona circellata (A. Adams & L.A. Reeve, 1847) - (CHITONIDAE)
- circinalis, Goldfussoceras circinalis (G.A. Goldfuss, 1844 †) - (EUOMPHALIDAE) (FOSSIL)
- Circinaria, syn of: Genus Haplotrema C.M.F. Ancey, 1881 (HAPLOTREMATIDAE)
- Circinaria, syn of: Genus Vallonia A. Risso, 1826 (VALLONIIDAE)
- circinaria, Dosinia circinaria G.P. Deshayes, 1853 - syn of: Dosinia crocea G.P. Deshayes, 1853 - (VENERIDAE)
- circinata, Chama circinata T.A. de M. Monterosato, 1878 - (CHAMIDAE)
- circinata, Papillifera bidens circinata (M. Paulucci, 1878) - (CLAUSILIIDAE)
- circinata, Aforia circinata (W.H. Dall, 1873) - (COCHLESPIRIDAE)
- circinata, Cuspidaria circinata (J.G. Jeffreys, 1876) - (CUSPIDARIIDAE)
- circinata, Niso circinata W.H. Dall, 1889 - (EULIMIDAE)
- circinata, Trapania circinata T.M. Gosliner & S.J. Fahey, 2008 - (GONIODORIDIDAE)
- circinata, Pachystrophia circinata J.J.F. Whiteaves, 1884 † - syn of: Pachystrophia gotlandica (Lindström, 1884 †) - (HOLOPEIDAE) (FOSSIL)
- circinata, Myrtea circinata A. Adams, 1862 - (LUCINIDAE)
- circinata, Favartia circinata (R. Houart & V. Héros, 2012) - (MURICIDAE)
- circinata, Pygmaepterys circinata R. Houart & V. Héros, 2012 - syn of: Favartia circinata (R. Houart & V. Héros, 2012) - (MURICIDAE)
- circinata, Americoliva circinata (F.P. Marrat, 1871) - (OLIVIDAE)
- circinata, Leucosyrinx circinata W.H. Dall, 1873 - syn of: Aforia circinata (W.H. Dall, 1873) - (PSEUDOMELATOMIDAE)
- circinata, Oscilla circinata A. Adams, 1867 - (PYRAMIDELLIDAE)
- circinata, Alvania circinata A. Adams, 1861 - (RISSOIDAE)
- circinata, Terebra circinata G.P. Deshayes, 1857 - (TEREBRIDAE)
- circinata, Pleurotoma circinata W.H. Dall, 1873 - syn of: Aforia circinata (W.H. Dall, 1873) - (TURRIDAE)
- circinata, Valvata circinata C.L.F. von Sandberger, 1871 † - (VALVATIDAE) (FOSSIL)
- circinata, Lamelliconcha circinata (I. von Born, 1778) - (VENERIDAE)
- circinata, Venus circinata I. von Born, 1778 - syn of: Lamelliconcha circinata (I. von Born, 1778) - (VENERIDAE)
- circinata goajira, Oliva circinata goajira E.J. Petuch & D.M. Sargent, 1986 - syn of: Oliva goajira E.J. Petuch & D.M. Sargent, 1986 - (OLIVIDAE)
- circinata jorioi, Americoliva circinata jorioi (E.J. Petuch, 2013) - (OLIVIDAE)
- circinata jurana, Valvata circinata jurana P. Jodot, 1954 † - (VALVATIDAE) (FOSSIL)
- circinata tostesi, Americoliva circinata tostesi (E.J. Petuch, 1987) - (OLIVIDAE)
- circinata vinacea, Lamelliconcha circinata vinacea A.A. Olsson, 1961 - syn of: Lamelliconcha vinacea A.A. Olsson, 1961 - (VENERIDAE)
- circinatus, Capulus circinatus R. Tate, 1893 † - (CAPULIDAE) (FOSSIL)
- circinatus, Straparollus circinatus Fenton & Fenton, 1924 † - syn of: Orecopia circinatus (Fenton & Fenton, 1924 †) - (EUOMPHALIDAE) (FOSSIL)
- circinatus, Orecopia circinatus (Fenton & Fenton, 1924 †) - (OMPHALOTROCHIDAE) (FOSSIL)
- circinatus, Ecculiomphalus circinatus Lindström, 1884 † - syn of: Pachystrophia gotlandica (Lindström, 1884 †) - (OPHILETIDAE) (FOSSIL)
- circinatus, Potomida circinatus H. Drouët, 1894 - syn of: Potomida littoralis (G.L.C.F.D. Cuvier, 1798) - (UNIONIDAE)
- circinatus, Pitar circinatus I. von Born, 1778 - syn of: Lamelliconcha circinata (I. von Born, 1778) - (VENERIDAE)
- circinnata, Trochulus circinnata S.E. Studer - syn of: Trichia hispida (C. Linnaeus, 1758) - (HYGROMIIDAE)
- Circlimopa, syn of: Subgenus Limopsis (Pectunculina) D'Orbigny, 1843 (LIMOPSIDAE)
- Circlotoma, Genus Circlotoma C.F. Laseron, 1958 (TORNIDAE)
- Circogryphaea, Genus Circogryphaea Vialov, 1936 † (GRYPHAEIDAE) (FOSSIL)
- Circomphalus, Genus Circomphalus O.A.L. Mörch, 1853 (VENERIDAE)
- Circompholos, syn of: Genus Dosinia J.A. Scopoli, 1777 (VENERIDAE)
- Circotheca, Genus Circotheca Syssoiev , 1958 † (CIRCOTHECIDAE) (FOSSIL)
- CIRCOTHECIDAE Rozanov & al., 1969 † - Family (HYOLITHA-ORTHOTHECIDA [Order]) (FOSSIL)
- Circuitus, Genus Circuitus Rubio & Rolán, 2017 (TORNIDAE)
- circula, Neocancilla circula (L.C. Kiener, 1838) - (MITRIDAE)
- circula, Teredo circula T.H. Aldrich, 1886 † - syn of: Kuphus incrassatus W.M. Gabb, 1873 † - (TEREDINIDAE) (FOSSIL)
- circula pura, Neocancilla circula pura (A. Adams, 1853) - (MITRIDAE)
- circulare, Nonyaniceras circulare Klinger & J. Kennedy, 1977 † - (ANCYLOCERATIDAE) (FOSSIL)
- circulare, Tmetoceras circulare Buckman † - (HILDOCERATIDAE) (FOSSIL)
- circulare, Systrophoceras circulare C. Chen & H.X. Liu, 1974 † - (LECHRITROCHOCERATIDAE) (FOSSIL)
- circulare, Gyroceras circulare Barrande, 1865 † - syn of: Gyroceratites circularis Barrande, 1865 † - (ONCOCERIDA (unassigned)) (FOSSIL)
- circularis, Thetiopsis circularis (Meek & Hayden 1856) † - (CARDIIDA (UNASSIGNED)) (FOSSIL)
- circularis, Cyanocyclas circularis W.B. Marshall, 1924 - syn of: Cyanocyclas paranacensis (A.V.M.D. D'Orbigny, 1835) - (CYRENIDAE)
- circularis, Lewyites circularis (Lewy, 1969 †) - (DIPLOMOCERATIDAE) (FOSSIL)
- circularis, Euomphalus circularis B. Phillips, 1841 † - syn of: Ibergia circularis (B. Phillips, 1841 †) - (EUOMPHALIDAE) (FOSSIL)
- circularis, Straparollus circularis B. Phillips, 1841 † - syn of: Ibergia circularis (B. Phillips, 1841 †) - (EUOMPHALIDAE) (FOSSIL)
- circularis, Profundisepta circularis (W.H. Dall, 1881) - (FISSURELLIDAE)
- circularis, Ibergia circularis (B. Phillips, 1841 †) - (GOSSELETINIDAE) (FOSSIL)
- circularis, Furcopenis circularis J. Castillejo & R. Mascato, 1987 - (LIMACIDAE)
- circularis, Littorina circularis Moore † - (LITTORINIDAE) (FOSSIL)
- circularis, Quemocuomegalodon circularis Yao & al., 2007 † - (MEGALODONTIDAE) (FOSSIL)
- circularis, Gyroceratites circularis Barrande, 1865 † - (MIMOCERATIDAE) (FOSSIL)
- circularis, Periclaraia circularis Li & Ding, 1981 † - (PECTINIDAE) (FOSSIL)
- circularis, Argopecten circularis G.B. I Sowerby, 1835 - syn of: Argopecten irradians concentricus (T. Say, 1822) - (PECTINIDAE)
- circularis, Periploma circularis L. Krishtofovich, 1984 † - (PERIPLOMATIDAE) (FOSSIL)
- circularis, Phyllidiopsis circularis Á. Valdés, 2001 - (PHYLLIDIIDAE)
- circularis, Bositra circularis Hsu, 1937 † - (POSIDONIIDAE) (FOSSIL)
- circularis, Proendoceras circularis Zou, 1987 † - (PROTEROCAMEROCERATIDAE) (FOSSIL)
- circularis, Pseudomonotis circularis W.M. Gabb, 1869 † - (PSEUDOMONOTIDAE) (FOSSIL)
- circularis, Eoscaphites circularis (Sowerby, 1836 †) - (SCAPHITIDAE) (FOSSIL)
- circularis, Schizodus circularis A.H. Worthen, 1884 † - syn of: Schizodus depressus A.H. Worthen, 1884 † - (SCHIZODIDAE) (FOSSIL)
- circularis, Turbo circularis L.A. Reeve, 1848 - syn of: Carswellena gruneri (R.A. Philippi, 1846) - (TURBINIDAE)
- circularis, Unionelloides circularis (Ding & al., 1982 †) - (UNIONIDAE) (FOSSIL)
- circularis, Jishuiconcha circularis Ding & al., 1982 † - syn of: Unionelloides circularis (Ding & al., 1982 †) - (UNIONIDAE) (FOSSIL)
- circularis, Anodonta circularis Hilbert, 1912 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- circularis, Dosinia circularis A. Römer, 1862 - (VENERIDAE)
- circularis, Gouldia circularis G.P. Deshayes, 1857 † - (VENERIDAE) (FOSSIL)
- circularis, Shaninopsis circularis Isberg, 1934 † - (VLASTIDAE) (FOSSIL)
- circulata, Hydatina circulata T. Martyn, 1789 - syn of: Hydatina zonata (J. Lightfoot, 1786) - (APLUSTRIDAE)
- circulata, Neocancilla circulata L.A. Reeve, 1844 - syn of: Neocancilla circula (L.C. Kiener, 1838) - (MITRIDAE)
- circulatum, Rossoceras circulatum Gil, 1988 † - (PADUNOCERATIDAE) (FOSSIL)
- circulatus, Euchelus circulatus (H.E. Anton, 1849) - (CHILODONTIDAE)
- circulatus, Paragloborilus circulatus Z.X. Qian & Zhang, 1983 † - (CIRCOTHECIDAE) (FOSSIL)
- circulatus, Trochus circulatus H.E. Anton, 1849 - syn of: Euchelus circulatus (H.E. Anton, 1849) - (TROCHIDAE)
- circulia, Lienardia circulia G. Nevill & H. Nevill, 1875 - syn of: Lienardia curculio (G. Nevill & H. Nevill, 1869) - (CLATHURELLIDAE)
- CIRCULIDAE - syn of Family: TORNIDAE
- circuliportus, Bostryx circuliportus A.S.H. Breure, 1978 - (BULIMULIDAE)
- circuliportus rimacensis, Bostryx circuliportus rimacensis A.S.H. Breure, 1978 - (BULIMULIDAE)
- Circulopsis, Genus Circulopsis A.E.M. Cossmann, 1901 (TORNIDAE)
- Circuloscala, Subgenus Cirsotrema (Circuloscala) De Boury, 1886 (EPITONIIDAE)
- circulospadix, Achatinella bulimoides circulospadix D.A. Welch, 1954 - (ACHATINELLIDAE)
- Circulter, Genus Circulter C.F. Laseron, 1958 (TORNIDAE)
- circulus, Bradybaena circulus (L. Pfeiffer, 1846) - (BRADYBAENIDAE)
- circulus, Glacidorbis circulus W.F. Ponder & G.J. Avern, 2000 - (GLACIDORBIDAE)
- circulus, Pericyclus circulus D. Korn & al., 2010 † - (PERICYCLIDAE) (FOSSIL)
- circulus, Discartemon circulus T. Siriboon & S. Panha, 2014 - (STREPTAXIDAE)
- Circulus, Genus Circulus J.G. Jeffreys, 1865 (TORNIDAE)
- circulus, Potomida circulus J.R. Bourguignat in É.A.A. Locard, 1893 - syn of: Potomida littoralis (G.L.C.F.D. Cuvier, 1798) - (UNIONIDAE)
- circulus hiroshihorii, Bradybaena circulus hiroshihorii J.T. Kuroda, 1973 - (BRADYBAENIDAE)
- circulus oceanica, Bradybaena circulus oceanica T. Habe, 1962 - (BRADYBAENIDAE)
- circum, Erbenoceras circum Ruan, 1981 † - (MIMOSPHINCTIDAE) (FOSSIL)
- circumactus, Vituliconus circumactus (T. Iredale, 1929) - (CONIDAE)
- circumantarctica, Slosarczykovia circumantarctica M. Lipinski, 2001 - (BRACHIOTEUTHIDAE)
- circumcarinata, Provermicularia circumcarinata (Stoppani, 1858 †) - (EULIMIDAE) (FOSSIL)
- circumcarinata, Monadenia circumcarinata (R.E.C. Stearns, 1879) - (MONADENIIDAE)
- circumcincta, Laminella concinna circumcincta A. Hyatt & H.A. Pilsbry, 1911 - (AMASTRIDAE)
- circumcincta, Neadmete circumcincta (W.H. Dall, 1873) - (CANCELLARIIDAE)
- circumcincta, Cancellaria circumcincta W.H. Dall, 1873 - syn of: Neadmete circumcincta (W.H. Dall, 1873) - (CANCELLARIIDAE)
- circumcincta, Zemitrella circumcincta R.K. Dell, 1962 - (COLUMBELLIDAE)
- circumcincta, Antalis circumcincta (R.B. Watson, 1879) - (DENTALIIDAE)
- circumcincta, Tengchiena circumcincta (J.C. Cox, 1868) - (EUCONULIDAE)
- circumcincta, Coneuplecta circumcincta (O.W.H. Reinhardt, 1883) - (EUCONULIDAE)
- circumcincta, Leiostraca circumcincta (A. Adams, 1863) - (EULIMIDAE)
- circumcincta, Eulima circumcincta A. Adams, 1863 - syn of: Leiostraca circumcincta (A. Adams, 1863) - (EULIMIDAE)
- circumcincta, Nassa circumcincta A. Adams, 1852 - syn of: Nassarius circumcinctus (A. Adams, 1852) - (NASSARIIDAE)
- circumcincta, Ammonicera circumcincta E. Rolán, 1992 - syn of: Ammonicera circumcirra E. Rolán, 1992 - (OMALOGYRIDAE)
- circumcincta, Monilispira circumcincta G.W. Nowell-Usticke, 1969 - (PSEUDOMELATOMIDAE)
- circumcincta, Perirhoe circumcincta (G.P. Deshayes, 1857) - (TEREBRIDAE)
- circumcincta lactea, Nassarius circumcincta lactea P.M. Pallary, 1912 - syn of: Nassarius circumcinctus (A. Adams, 1852) - (NASSARIIDAE)
- circumcinctum, Calliostoma circumcinctum W.H. Dall, 1881 - (CALLIOSTOMATIDAE)
- circumcinctum, Leucosyrinx circumcinctum É.A.A. Locard, 1897 - syn of: Borsonia hirondelleae (P. Dautzenberg, 1891) - (PSEUDOMELATOMIDAE)
- circumcinctum, Pleurotoma circumcinctum É.A.A. Locard, 1897 - syn of: Borsonia hirondelleae (P. Dautzenberg, 1891) - (TURRIDAE)
- circumcinctus, Nassarius circumcinctus (A. Adams, 1852) - (NASSARIIDAE)
- circumcirra, Ammonicera circumcirra E. Rolán, 1992 - (OMALOGYRIDAE)
- circumcisus, Pionoconus circumcisus (I. von Born, 1778) - (CONIDAE)
- circumclausus, Conus circumclausus A. Feneaux, 1942 - syn of: Nitidoconus balteatus (G.B. I Sowerby, 1833) - (CONIDAE)
- circumcordata, Odostomia circumcordata A. Peñas, E. Rolán & F. Swinnen, 2014 - (PYRAMIDELLIDAE)
- circumcostatus, Euphemites circumcostatus J.E. Walter, 1953 † - (EUPHEMITIDAE) (FOSSIL)
- circumdata, Chloritis circumdata (A.E.J. Férussac, 1821) - (CAMAENIDAE)
- circumdata, Euxina circumdata (L. Pfeiffer, 1848) - (CLAUSILIIDAE)
- circumdata, Helicarion circumdata H.A. Pilsbry, 1902 - (HELICARIONIDAE)
- circumdata, Helix circumdata A.E.J. Férussac, 1821 - syn of: Chloritis circumdata (A.E.J. Férussac, 1821) - (HELICIDAE)
- circumdata, Waikura circumdata C.R. Laws, 1941 † - (PYRAMIDELLIDAE) (FOSSIL)
- circumdata, Cingulina circumdata A.A. Gould, 1861 - syn of: Oscilla circinata A. Adams, 1867 - (PYRAMIDELLIDAE)
- circumdata, Niveria circumdata (F.A. Schilder, 1931) - (TRIVIIDAE)
- circumdata, Turritella circumdata G.P. Deshayes, 1861 † - (TURRITELLIDAE) (FOSSIL)
- circumdatus, Haustator circumdatus G.P. Deshayes, 1861 † - syn of: Turritella circumdata G.P. Deshayes, 1861 † - (TURRITELLIDAE) (FOSSIL)
- circumducta, Pyrgulina circumducta Peñas & Rolán, 2017 - (PYRAMIDELLIDAE)
- circumducta, Phorcus lineatus circumducta E. Fischer-Piette & I. Bennet, 1966 - (TROCHIDAE)
- circumfimbria, Helodiamea circumfimbria Peñas & Rolán, 2017 - (PYRAMIDELLIDAE)
- circumfirmatus, Poecilozonites circumfirmatus (J.H. Redfield, 1853) - (GASTRODONTIDAE)
- circumflavus, Durvilledoris circumflavus W.B. Rudman, 1990 - (CHROMODORIDIDAE)
- circumflexa, Conotheca circumflexa Missarzehevsky in Rozanov & al., 1969 † - (CIRCOTHECIDAE) (FOSSIL)
- circumflexifer, Goniatites circumflexifer C.L.F. von Sandberger, 1852 † - syn of: Holzapfeloceras circumflexiferum (C.L.F. von Sandberger, 1852 †) - (GONIATITIDAE) (FOSSIL)
- circumflexifer, Holzapfeloceras circumflexifer C.L.F. von Sandberger, 1852 † - syn of: Holzapfeloceras circumflexiferum (C.L.F. von Sandberger, 1852 †) - (SOBOLEWIIDAE) (FOSSIL)
- circumflexiferum, Holzapfeloceras circumflexiferum (C.L.F. von Sandberger, 1852 †) - (SOBOLEWIIDAE) (FOSSIL)
- circumflexum, Cyrtoceras circumflexum Barrande † - (ONCOCERIDA (UNASSIGNED)) (FOSSIL)
- circumflexus, Nehdenites circumflexus (C.L.F. von Sandberger, 1851 †) - (CHEILOCERATIDAE) (FOSSIL)
- circumflexus, Goniatites circumflexus C.L.F. von Sandberger, 1851 † - syn of: Nehdenites circumflexus (C.L.F. von Sandberger, 1851 †) - (GONIATITIDAE) (FOSSIL)
- circumfossa, Pachycrommium circumfossa (Rauff, 1884 †) - (AMPULLINIDAE) (FOSSIL)
- circumfossa, Phasianella circumfossa Rauff, 1884 † - syn of: Pachycrommium circumfossa (Rauff, 1884 †) - (PHASIANELLIDAE) (FOSSIL)
- circumfossa, Clinura circumfossa (A. von Koenen, 1872 †) - (RAPHITOMIDAE) (FOSSIL)
- circumlabiata, Isthmia circumlabiata A.A. Schileyko, 1984 - (VERTIGINIDAE)
- circumlabra, Pisinna circumlabra W.F. Ponder & E.K. Yoo, 1976 - (ANABATHRIDAE)
- circumlata, Bleytonella circumlata J. Gründel & H.A. Kollmann, 2013 † - (PICKWORTHIIDAE) (FOSSIL)
- circumlata, Turbonilla circumlata A. Peñas & E. Rolán, 2000 - (PYRAMIDELLIDAE)
- circumligata, Colpospira circumligata (J.C. Verco, 1910) - (TURRITELLIDAE)
- circumlineata, Omphalotropis circumlineata (A. Mousson, 1870) - (ASSIMINEIDAE)
- circumlineata, Helicina circumlineata G.W. Tryon, 1866 - (HELICINIDAE)
- circumlineata, Goniobasis circumlineata G.W. Tryon - (PLEUROCERIDAE)
- circumlineata, Gyralina circumlineata (L. Pfeiffer, 1846) - (ZONITIDAE)
- circumlineatus, Planorbis circumlineatus R.J. Shuttleworth, 1854 - syn of: Drepanotrema aeruginosum (P.M.A. Morelet, 1851) - (PLANORBIDAE)
- circumlirata, Lophonema circumlirata (R.P. Whitfield, 1886 †) - (HELICOTOMIDAE) (FOSSIL)
- circumliratus, Euomphalus circumliratus R.P. Whitfield, 1886 † - syn of: Lophonema circumlirata (R.P. Whitfield, 1886 †) - (EUOMPHALIDAE) (FOSSIL)
- circumlitum, Pupisoma circumlitum C. Hedley, 1897 - (VERTIGINIDAE)
- circumnodosa, Eucycloscala circumnodosa (E.A.L. Kittl, 1894 †) - (EUCYCLOSCALIDAE) (FOSSIL)
- circumnodosum, Cyclonema circumnodosum E.A.L. Kittl, 1894 † - syn of: Eucycloscala circumnodosa (E.A.L. Kittl, 1894 †) - (PLATYCERATIDAE) (FOSSIL)
- circumnodosus, Nodopericyclus circumnodosus D. Korn & al., 2010 † - (PERICYCLIDAE) (FOSSIL)
- circumornata, Coryda circumornata (A.E.J. Férussac, 1821) - (CEPOLIDAE)
- circumpicta, Striostrea circumpicta (H.A. Pilsbry, 1904) - (OSTREIDAE)
- circumpicta, Ostrea circumpicta Y. Hirase, 1930 - syn of: Crassostrea nippona (K. Seki, 1934) - (OSTREIDAE)
- circumplexa, Systrophia circumplexa (A.E.J. Férussac, 1839) - (SCOLODONTIDAE)
- circumplicata, Chondrina circumplicata C.A. Westerlund, 1875 - syn of: Chondrina multidentata P. von Ströbel, 1851 - (CHONDRINIDAE)
- circumplicatus, Diaplococeras circumplicatus (Mojsisovics, 1882 †) - (CERATITIDA (UNASSIGNED)) (FOSSIL)
- circumrosa, Toledonia circumrosa (K.H.J. Thiele, 1904) - (DIAPHANIDAE)
- Circumscapula, syn of: Genus Dolichupis T. Iredale, 1930 (TRIVIIDAE)
- circumscisus, Lyrodiscus circumscisus (Gottschick, 1920) † - (ZONITIDAE) (FOSSIL)
- circumscripta, Cylichnania circumscripta J. Marwick, 1931 † - (CYLICHNIDAE) (FOSSIL)
- circumscripta, Ringicula circumscripta Helwerda, 2015 - (RINGICULIDAE)
- circumscriptum, Cerion circumscriptum C.G. Aguayo & M.L. Jaume, 1951 - (CERIONIDAE)
- circumscriptum romanoensis, Cerion circumscriptum romanoensis C.G. Aguayo & M.I. Sánchez Roig, 1953 - syn of: Cerion romanoensis C.G. Aguayo & M.I. Sánchez Roig, 1953 - (CERIONIDAE)
- circumscriptum tenuicallum, Cerion circumscriptum tenuicallum C.G. Aguayo & M.I. Sánchez Roig, 1953 - (CERIONIDAE)
- circumscriptus, Carinarion circumscriptus (G. Johnston, 1828) - (ARIONIDAE)
- circumsenta, Stenoplax circumsenta S.S. Berry, 1956 - (ISCHNOCHITONIDAE)
- circumsepta, Parthenina circumsepta Peñas & Rolán, 2017 - (PYRAMIDELLIDAE)
- circumserrata, Clatrosansonia circumserrata (B.K. Raines, 2002) - (PICKWORTHIIDAE)
- circumsessa, Lyrodiscus circumsessa (R.J. Shuttleworth, 1852) - (ZONITIDAE)
- circumsignatus, Conus circumsignatus J.C.H. Crosse, 1865 - syn of: Textilia floccatus G.B. I Sowerby, 1841 - (CONIDAE)
- circumsonaxa, Manaria circumsonaxa Fraussen & Stahlschmidt, 2016 - (BUCCINIDAE)
- circumspinatus, Hoplotropites circumspinatus (Mojsisovics, 1893 †) - (TROPITIDAE) (FOSSIL)
- circumspinosum, Physodoceras circumspinosum (F.A. von Quenstedt, 1856 †) - (ASPIDOCERATIDAE) (FOSSIL)
- Circumstella, Genus Circumstella C.F. Laseron, 1958 (LIOTIIDAE)
- circumstomata, Diplommatina circumstomata J.T. Kuroda & J.M. Abe, 1980 - (DIPLOMMATINIDAE)
- circumstriata, Tryonia circumstriata A.B. Leonard & T.H. Ho, 1960 - (COCHLIOPIDAE)
- circumstriata, Sulcomitrella circumstriata (M.M. Schepman, 1911) - (COLUMBELLIDAE)
- circumstriata, Subularia circumstriata (M.M. Schepman, 1909) - (EULIMIDAE)
- circumstriata, Eulima circumstriata M.M. Schepman, 1909 - syn of: Subularia circumstriata (M.M. Schepman, 1909) - (EULIMIDAE)
- circumstriata, Oenopota dubia circumstriata M.M. Schepman, 1913 - (MANGELIIDAE)
- circumstriata, Brotia circumstriata (W. Metcalfe, 1851) - (PACHYCHILIDAE)
- circumstriata, Melania circumstriata W. Metcalfe, 1851 - syn of: Brotia circumstriata (W. Metcalfe, 1851) - (THIARIDAE)
- circumstriata, Retinella circumstriata J.W. Taylor, 1908 - (ZONITIDAE)
- circumstriatum, Crenilabium circumstriatum M.M. Schepman, 1909 - (ACTEONIDAE)
- circumstriatus, Gyraulus circumstriatus (G.W. Tryon, 1866) - (PLANORBIDAE)
- circumstriatus, Halistylus circumstriatus H.A. Pilsbry, 1897 - syn of: Halistylus columna W.H. Dall, 1890 - (TROCHIDAE)
- circumstricta, Nihonia circumstricta (E.C. Von Martens, 1901) - (COCHLESPIRIDAE)
- circumsulcata, Chemnitzia circumsulcata Stoppani, 1858 † - syn of: Omphaloptycha aldrovandii (Stoppani, 1857 †) - (PYRAMIDELLIDAE) (FOSSIL)
- circumsulcata, Melania circumsulcata G. von dem Busch - (THIARIDAE)
- circumsuta, Saccostrea circumsuta (A.A. Gould, 1850) - (OSTREIDAE)
- circumsuta, Ostrea circumsuta A.A. Gould, 1850 - syn of: Saccostrea circumsuta (A.A. Gould, 1850) - (OSTREIDAE)
- circumsutura, Turbonilla circumsutura A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- circumtexta, Urosalpinx circumtexta (R.E.C. Stearns, 1871) - (MURICIDAE)
- circumtexta, Nassa circumtexta E.C. Von Martens, 1903 - syn of: Nassarius vinctus (F.P. Marrat, 1877) - (NASSARIIDAE)
- circumtexta aurantia, Ocenebra circumtexta aurantia R.E.C. Stearns, 1871 - syn of: Urosalpinx circumtexta (R.E.C. Stearns, 1871) - (MURICIDAE)
- circumtextus, Nassarius circumtextus E.C. Von Martens, 1903 - syn of: Nassarius vinctus (F.P. Marrat, 1877) - (NASSARIIDAE)
- circumumbilicus, Neimongolidiscus circumumbilicus Pan & Cook, 2003 † - (TROPIDODISCIDAE) (FOSSIL)
- circumvallata, Monetaria circumvallata F.A. Schilder, 1933 - syn of: Monetaria moneta (C. Linnaeus, 1758) - (CYPRAEIDAE)
- circumvallata, Pseudocirsope circumvallata (A.E.M. Cossmann, 1888 †) - (ELACHISINIDAE) (FOSSIL)
- circumvallata, Nerita circumvallata J.F. Bayan, 1870 † - (NERITIDAE) (FOSSIL)
- circumvallatus, Chiton circumvallatus L.A. Reeve, 1847 - syn of: Ischnochiton circumvallatus (L.A. Reeve, 1847) - (CHITONIDAE)
- circumvallatus, Ischnochiton circumvallatus (L.A. Reeve, 1847) - (ISCHNOCHITONIDAE)
- circumventa, Ovalina circumventa A. Peñas & E. Rolán, 2017 - (PYRAMIDELLIDAE)
- circumvertens, Microdrillia circumvertens (J.C. Melvill & R. Standen, 1901) - (BORSONIIDAE)
- circumvertens, Drillia circumvertens J.C. Melvill & R. Standen, 1901 - syn of: Microdrillia circumvertens (J.C. Melvill & R. Standen, 1901) - (DRILLIIDAE)
- circumvittatum, Prunum circumvittatum (N.E. Weisbord, 1962) - (MARGINELLIDAE)
- circumvoluta, Clithon circumvoluta (C.A. Récluz, 1843) - (NERITIDAE)
- circumvoluta, Pleurotomella circumvoluta (R.B. Watson, 1881) - (RAPHITOMIDAE)
- circumvoluta, Pleurotoma circumvoluta R.B. Watson, 1881 - syn of: Pleurotomella circumvoluta (R.B. Watson, 1881) - (TURRIDAE)
- circumvolutum, Caecum circumvolutum Folin, 1867 - (CAECIDAE)
- circunfossa, Pseudamaura circunfossa Rauff, 1885 † - (AMPULLINIDAE) (FOSSIL)
- Circunula, Genus Circunula Koppka, 2015 † (GRYPHAEIDAE) (FOSSIL)
- circupluteus, Aimitus circupluteus Z.X. Qian, 1978 † - (HYOLITHIDA (UNASSIGNED)) (FOSSIL)
- circus, Calliostoma circus K.H. Barnard, 1969 - (CALLIOSTOMATIDAE)
- Ciree, syn of: Genus Venus C. Linnaeus, 1758 (VENERIDAE)
- Cirilla, syn of: Genus Raphitoma L.M.D. Bellardi, 1847 (RAPHITOMIDAE)
- Cirillia, syn of: Genus Raphitoma L.M.D. Bellardi, 1847 (RAPHITOMIDAE)
- Cirna, Subgenus Omphaloconus (Cirna) P.M. Pallary, 1928 (ENIDAE)
- ciroi, Acanthochitona ciroi G. Righi, 1971 - (ACANTHOCHITONIDAE)
- cirrata, Ludwigia cirrata Buckman † - (GRAPHOCERATIDAE) (FOSSIL)
- cirrata, Mopalia cirrata S.S. Berry, 1919 - (MOPALIIDAE)
- cirrata, Hendersonina cirrata (B.H. Wright in L. Pfeiffer, 1867) - (POMATIIDAE)
- cirrata, Taranis cirrata G.A. Brugnone, 1862 - syn of: Taranis moerchi (A.W. Malm, 1861) - (RAPHITOMIDAE)
- cirrata curta, Taranis cirrata curta É.A.A. Locard, 1897 - syn of: Taranis moerchi (A.W. Malm, 1861) - (RAPHITOMIDAE)
- cirrata simplex, Taranis cirrata simplex É.A.A. Locard, 1897 - syn of: Taranis moerchi (A.W. Malm, 1861) - (RAPHITOMIDAE)
- cirrata spinulosa, Taranis cirrata spinulosa É.A.A. Locard, 1897 - syn of: Taranis moerchi (A.W. Malm, 1861) - (RAPHITOMIDAE)
- cirrata tenuis, Taranis cirrata tenuis É.A.A. Locard, 1897 - syn of: Taranis moerchi (A.W. Malm, 1861) - (RAPHITOMIDAE)
- Cirratiscala, syn of: Genus Epitonium P.F. Röding, 1798 (EPITONIIDAE)
- cirratum, Pleurotoma cirratum G.A. Brugnone, 1862 - syn of: Taranis moerchi (A.W. Malm, 1861) - (TURRIDAE)
- cirratus, Arcestes cirratus White, 1879 † - syn of: Euflemingites cirratus (White, 1879 †) - (ARCESTIDAE) (FOSSIL)
- cirratus, Euflemingites cirratus (White, 1879 †) - (FLEMINGITIDAE) (FOSSIL)
- cirratus, Ruanites cirratus (Ruan, 1981 †) - (MIMOSPHINCTIDAE) (FOSSIL)
- cirratus, Unio cirratus I. Lea, 1874 - syn of: Unio abbevillensis I. Lea, 1857 - (UNIONIDAE)
- cirrhifera, Barnardaclesia cirrhifera (J.R.C. Quoy & J.P. Gaimard, 1832) - (APLYSIIDAE)
- cirrhifera, Notarchus cirrhifera J.R.C. Quoy & J.P. Gaimard, 1832 - syn of: Barnardaclesia cirrhifera (J.R.C. Quoy & J.P. Gaimard, 1832) - (APLYSIIDAE)
- cirrhosa, Euomphalopterus cirrhosa (Lindström, 1884 †) - (EUOMPHALIDAE) (FOSSIL)
- cirrhosa, Eledone cirrhosa (J.B.P.A. Lamarck, 1798) - (OCTOPODIDAE)
- cirrhosa, Ozoena cirrhosa J.B.P.A. Lamarck, 1798 - syn of: Eledone cirrhosa (J.B.P.A. Lamarck, 1798) - (OCTOPODIDAE)
- cirrhosa, Pleurotomaria cirrhosa Lindström, 1884 † - syn of: Euomphalopterus cirrhosa (Lindström, 1884 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- cirrhosa aldrovandi, Eledone cirrhosa aldrovandi (P.D. Montfort, 1802) - (OCTOPODIDAE)
- Cirrhus, syn of: Genus Cirrus Sowerby, 1816 † (CIRRIDAE) (FOSSIL)
- CIRRIDAE Cossmann, 1916 † - Family (GASTROPODA-VETIGASTROPODA [Subclass]-PORCELLIOIDEA [Superfamily]) (FOSSIL)
- cirridioides, Schizostoma cirridioides E.A.L. Kittl, 1894 † - (EUOMPHALIDAE) (FOSSIL)
- cirridioides, Woehrmannia cirridioides Böhm 1895 † - (LIOTIIDAE) (FOSSIL)
- Cirridius, syn of: Genus Cirrus Sowerby, 1816 † (CIRRIDAE) (FOSSIL)
- Cirrifer, syn of: Genus Pneumoderma A.F.P.M. de Roissy, 1805 (PNEUMODERMATIDAE)
- cirriformis, Platyzona cirriformis (Sowerby, 1815 †) - (GONIASMATIDAE) (FOSSIL)
- cirriformis, Mourlonia cirriformis Sowerby, 1815 † - syn of: Platyzona cirriformis (Sowerby, 1815 †) - (GOSSELETINIDAE) (FOSSIL)
- cirriformis, Worthenia cirriformis (Laube, 1868 †) - (LOPHOSPIRIDAE) (FOSSIL)
- cirriformis, Euspira cirriformis (J. de C. Sowerby, 1824 †) - (NATICIDAE) (FOSSIL)
- cirrigera, Okenia cirrigera R.A. Philippi, 1839 - syn of: Okenia elegans (F.S. Leuckart, 1828) - (GONIODORIDIDAE)
- cirrita, Trapania cirrita T.M. Gosliner & S.J. Fahey, 2008 - (GONIODORIDIDAE)
- cirritum, Cirsotrema cirritum Duerr, 2004 † - (EPITONIIDAE) (FOSSIL)
- cirritus, Pseudozygopleura cirritus Hoare & Sturgeon, 1985 † - (PSEUDOZYGOPLEURIDAE) (FOSSIL)
- Cirroceras, Genus Cirroceras Conrad, 1866 † (NOSTOCERATIDAE) (FOSSIL)
- CIRROCTOPODIDAE Collins & Villenueva, 2006 - Family (CEPHALOPODA-COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-OCTOPODA [Order]-CIRRATA [Suborder])
- Cirroctopus, Genus Cirroctopus A. Naef, 1923 (CIRROCTOPODIDAE)
- cirroides, Platyschisma cirroides F. McCoy, 1844 † - (PLATYCERATIDAE) (FOSSIL)
- cirroides, Nummogaultina cirroides (A. Brongniart, 1822 †) - (TURBINIDAE) (FOSSIL)
- Cirrophaedusa, Genus Cirrophaedusa J. Grego & M. Szekeres, 2011 (CLAUSILIIDAE)
- Cirrophaedusa, syn of: Subgenus Oospira (Paraformosana) H. Nordsieck 2003 (CLAUSILIIDAE)
- Cirropsis, syn of: Genus Holopea Hall, 1847 † (HOLOPEIDAE) (FOSSIL)
- cirroptera, Cymbulia cirroptera C. Gegenbaur, 1855 - syn of: Desmopterus papilio C. Chun, 1889 - (CYMBULIIDAE)
- cirropterus, Desmopterus cirropterus (C. Gegenbaur, 1855) - (DESMOPTERIDAE)
- cirrosa, Favartia cirrosa (R.B. Hinds, 1844) - (MURICIDAE)
- cirrosa, Murexiella cirrosa R.B. Hinds, 1844 - syn of: Favartia cirrosa (R.B. Hinds, 1844) - (MURICIDAE)
- cirrosus, Murex cirrosus R.B. Hinds, 1844 - syn of: Favartia cirrosa (R.B. Hinds, 1844) - (MURICIDAE)
- CIRROTEUTHIDAE Keferstein, 1866 - Family (CEPHALOPODA-COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-OCTOPODA [Order]-CIRRATA [Suborder])
- Cirroteuthis, Genus Cirroteuthis D.F. Eschricht, 1836 (CIRROTEUTHIDAE)
- Cirroteuthopsis, syn of: Genus Opisthoteuthis A.E. Verrill, 1883 (OPISTHOTEUTHIDAE)
- Cirrothauma, Genus Cirrothauma C. Chun, 1911 (CIRROTEUTHIDAE)
- cirrus, Dicroloma cirrus (Eudes-Deslongchamps, 1843 †) - (APORRHAIDAE) (FOSSIL)
- cirrus, Alaria cirrus Morris & J. Lycett, 1851 † - syn of: Dicroloma playnei L.R. Cox & Arkell, 1950 † - (APORRHAIDAE) (FOSSIL)
- cirrus, Calliostoma cirrus (White, 1887 †) - (CALLIOSTOMATIDAE) (FOSSIL)
- Cirrus, Genus Cirrus Sowerby, 1816 † (CIRRIDAE) (FOSSIL)
- cirrus, Rostellaria cirrus Eudes-Deslongchamps, 1843 † - syn of: Dicroloma cirrus (Eudes-Deslongchamps, 1843 †) - (ROSTELLARIIDAE) (FOSSIL)
- cirrus, Pterocera cirrus L.É.S. Piette, 1856 † - syn of: Dicroloma cirrus (Eudes-Deslongchamps, 1843 †) - (STROMBIDAE) (FOSSIL)
- cirrus, Strioterebrum cirrus W.H. Dall, 1895 † - (TEREBRIDAE) (FOSSIL)
- cirrus, Trochus cirrus White, 1887 † - syn of: Calliostoma cirrus (White, 1887 †) - (TROCHIDAE) (FOSSIL)
- cirsiumoides, Phaenomenella cirsiumoides (K. Fraussen, 2004) - (BUCCINIDAE)
- Cirsocerithium, Genus Cirsocerithium Cossmann, 1906 † (PROCERITHIIDAE) (FOSSIL)
- Cirsochilus, Genus Cirsochilus A.E.M. Cossmann, 1888 (COLLONIIDAE)
- cirsochilus, Bouryia cirsochilus (A.E.M. Cossmann & G. Pissarro, 1902 †) - (POMATIOPSIDAE) (FOSSIL)
- Cirsomphalus, Genus Cirsomphalus A.E.M. Cossmann, 1907 (AMNICOLIDAE)
- Cirsonella, Genus Cirsonella G.F. Angas, 1877 (SKENEIDAE)
- Cirsope, Genus Cirsope A.E.M. Cossmann, 1888 † (ELACHISINIDAE) (FOSSIL)
- cirsophora, Bythinella cirsophora A.E.M. Cossmann, 1888 † - (BYTHINELLIDAE) (FOSSIL)
- Cirsostrema, syn of: Genus Cirsotrema O.A.L. Mörch, 1852 (EPITONIIDAE)
- Cirsostylus, Genus Cirsostylus Cossmann, 1918 † (ARCHAEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- Cirsotrema, Genus Cirsotrema O.A.L. Mörch, 1852 (EPITONIIDAE)
- Cirsotremopsis, Subgenus Cirsotrema (Cirsotremopsis) Thiele, 1928 † (EPITONIIDAE) (FOSSIL)
- Cirsotremopsis, syn of: Genus Cirsotrema O.A.L. Mörch, 1852 (EPITONIIDAE)
- Cirsula, syn of: Subgenus Angulus (Scissula) W.H. Dall, 1900 (TELLINIDAE)
- cirtae, Toxoceras cirtae Coquand, 1880 † - syn of: Karsteniceras cirtae (Coquand, 1880 †) - (ANCYLOCERATIDAE) (FOSSIL)
- cirtae, Karsteniceras cirtae (Coquand, 1880 †) - (LEPTOCERATOIDIDAE) (FOSSIL)
- cirtensis, Helix cirtensis W. Kobelt, 1903 - syn of: Cornu aspersum (O.F. Müller, 1774) - (HELICIDAE)
- ciryi, Cenoceras ciryi Rulleau, 2008 † - (CENOCERATIDAE) (FOSSIL)
- ciryi, Praeradiolites ciryi Floquet, 1991 † - (RADIOLITIDAE) (FOSSIL)
- cisalpina, Cernuella cisalpina (E.A. Rossmässler, 1837) - (HYGROMIIDAE)
- cisalpina, Vertigo cisalpina C. Pollonera, 1885 - syn of: Vertigo antivertigo J.P.R. Draparnaud, 1801 - (VERTIGINIDAE)
- cisalpina, Aegopinella cisalpina F. Riedel, 1983 - (ZONITIDAE)
- ciscaucasica, Metatheba ciscaucasica B. Hausdorf, 2000 - (HYGROMIIDAE)
- ciscoense, Agathiceras ciscoense Smith, 1903 † - (AGATHICERATIDAE) (FOSSIL)
- cisium, Cymbium cisium K.T. Menke, 1828 - syn of: Cymbium cymbium (C. Linnaeus, 1758) - (VOLUTIDAE)
- ciskae, Teinostoma ciskae M.J. Faber, 1995 - (TORNIDAE)
- cisneroi, Cerion cisneroi W.J. Clench & C.G. Aguayo, 1951 - syn of: Cerion cisnerosi W.J. Clench & C.G. Aguayo, 1951 - (CERIONIDAE)
- cisneroi, Helicina cisneroi R. Arango, 1876 - syn of: Semitrochatella babei (R. Arango, 1876) - (HELICINIDAE)
- cisnerosi, Cerion cisnerosi W.J. Clench & C.G. Aguayo, 1951 - (CERIONIDAE)
- cisnerosi, Farcimen cisnerosi L.O. Alcalde, 1945 - (MEGALOMASTOMIDAE)
- cisnerosi, Chondrothyrella assimilis cisnerosi C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- cisnerosi, Pycnoptychia humboldtii cisnerosi C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- cisnerosi edouardi, Farcimen cisnerosi edouardi L.O. Alcalde, 1945 - (MEGALOMASTOMIDAE)
- cisnerosi sanchezi, Farcimen cisnerosi sanchezi L.O. Alcalde, 1945 - (MEGALOMASTOMIDAE)
- cissana, Hydrobia cissana P. Radoman, 1977 - syn of: Ecrobia ventrosa (G. Montagu, 1803) - (HYDROBIIDAE)
- cisshuensis, Glycymeris cisshuensis J. Makiyama, 1926 † - (GLYCYMERIDIDAE) (FOSSIL)
- Cista, syn of: Genus Anodonta J.B.P.A. Lamarck, 1799 (UNIONIDAE)
- cistaformis, Uniconomorphites cistaformis Farsan, 1994 † - (UNICONOMORPHITIDAE) (FOSSIL)
- cistagemma, Euciroa cistagemma J.T. Kuroda, 1952 - syn of: Euciroa crassa K.H.J. Thiele & S.G.A. Jaeckel, 1931 - (EUCIROIDAE)
- cistella, Anatina cistella L.A. Reeve, 1863 - syn of: Laternula laterna (J.B.P.A. Lamarck, 1818) - (MACTRIDAE)
- cistellaeformis, Elliptio cistellaeformis I. Lea, 1863 - (UNIONIDAE)
- cisterciensorum, Bythiospeum cisterciensorum P.L. Reischütz, 1983 - (HYDROBIIDAE)
- cisternarum, Radix cisternarum E. Caziot, 1902 - syn of: Radix labiata (E.A. Rossmässler, 1835) - (LYMNAEIDAE)
- cisternasi, Amandana cisternasi (J.G. Hidalgo, 1883) - (HYGROMIIDAE)
- cisternasi calasaladae, Amandana cisternasi calasaladae (S.G.A. Jaeckel, 1952) - (HYGROMIIDAE)
- cisternasi calderensis, Amandana cisternasi calderensis (L. Gasull, 1963) - (HYGROMIIDAE)
- cisternasi canae, Amandana cisternasi canae (S.H.F. Jaeckel, 1952) - (HYGROMIIDAE)
- cisternasi conjungens, Amandana cisternasi conjungens (S.H.F. Jaeckel, 1952) - (HYGROMIIDAE)
- cisternasi hortae, Amandana cisternasi hortae (F. Schröder, 1978) - (HYGROMIIDAE)
- cisternasi margaritae, Amandana cisternasi margaritae (S.G.A. Jaeckel, 1952) - (HYGROMIIDAE)
- cisternasi mesquidae, Amandana cisternasi mesquidae (F. Schröder, 1978) - (HYGROMIIDAE)
- cisternasi muradae, Amandana cisternasi muradae (S.H.F. Jaeckel, 1952) - (HYGROMIIDAE)
- cisternasi ortizi, Amandana cisternasi ortizi (L. Gasull, 1964) - (HYGROMIIDAE)
- cisternasi redonae, Amandana cisternasi redonae (S.G.A. Jaeckel, 1952) - (HYGROMIIDAE)
- cisternasi scopulicola, Amandana cisternasi scopulicola (A. Bofill & J.B. Aguilar-Amat, 1924) - (HYGROMIIDAE)
- cisternasi vedrae, Amandana cisternasi vedrae (S.G.A. Jaeckel, 1952) - (HYGROMIIDAE)
- cisternasi vedranellensis, Amandana cisternasi vedranellensis (S.G.A. Jaeckel, 1952) - (HYGROMIIDAE)
- cisternicola, Paludina cisternicola P.M.A. Morelet, 1851 - syn of: Pyrgophorus coronatus (L. Pfeiffer, 1840) - (VIVIPARIDAE)
- cisternina, Amnicola cisternina B. Walker, 1919 - syn of: Aroapyrgus cisterninus (B. Walker, 1919) - (AMNICOLIDAE)
- cisternina, Physa cisternina P.M.A. Morelet, 1851 - syn of: Mayabina spiculata (P.M.A. Morelet, 1849) - (PHYSIDAE)
- cisternina, Paludina cisternina H.C. Küster, 1852 - syn of: Pyrgophorus coronatus (L. Pfeiffer, 1840) - (VIVIPARIDAE)
- cisternina abbreviata, Aplecta cisternina abbreviata P.H. Fischer & J.C.H. Crosse, 1886 - syn of: Mayabina polita D.W. Taylor, 2003 - (PHYSIDAE)
- cisternina gracilis, Aplecta cisternina gracilis P.H. Fischer & J.C.H. Crosse, 1886 - syn of: Mayabina polita D.W. Taylor, 2003 - (PHYSIDAE)
- cisternina minor, Aplecta cisternina minor P.H. Fischer & J.C.H. Crosse, 1886 - syn of: Mayabina polita D.W. Taylor, 2003 - (PHYSIDAE)
- cisterninus, Pyrgophorus cisterninus (H.C. Küster, 1852) - (COCHLIOPIDAE)
- cisterninus, Aroapyrgus cisterninus (B. Walker, 1919) - (COCHLIOPIDAE)
- Cistopus, Genus Cistopus J.E. Gray, 1849 (OCTOPODIDAE)
- cistorum, Helicella cistorum (P.M.A. Morelet, 1845) - (HYGROMIIDAE)
- cistronium, Aorotrema cistronium (W.H. Dall, 1889) - (TORNIDAE)
- cistula, Anadara cistula (L.A. Reeve, 1844) - (ARCIDAE)
- cistula, Chama cistula L.A. Reeve, 1847 - syn of: Chama sinuosa W.J. Broderip, 1836 - (CHAMIDAE)
- cistula, Lasaea cistula A.M. Keen, 1938 - syn of: Lasaea adansoni W.H. Dall, 1899 - (LASAEIDAE)
- cistula, Lasaea cistula A.M. Keen, 1938 - syn of: Lasaea adansoni W.H. Dall, 1899 - (LASAEIDAE)
- cistula, Pandora cistula Gould, 1850 - (PANDORIDAE)
- Cistula, syn of: Genus Cistulops F.C. Baker, 1924 (POMATIIDAE)
- cistula, Lacteoluna cistula H.A. Pilsbry, 1942 - (SAGDIDAE)
- cistula, Abra cistula (J.C. Melvill & R. Standen, 1907) - (SEMELIDAE)
- Cistulops, Genus Cistulops F.C. Baker, 1924 (POMATIIDAE)
- citeria, Dolichupis citeria (C.N. Cate, 1979) - (TRIVIIDAE)
- cithara, Carinaria cithara W.H. Benson, 1835 - (CARINARIIDAE)
- cithara, Microcithara cithara (L.A. Reeve, 1859) - (COLUMBELLIDAE)
- cithara, Pusia cithara (L.A. Reeve, 1845) - (COSTELLARIIDAE)
- cithara, Morum cithara R.B. Watson, 1881 - syn of: Morum uchiyamai J.T. Kuroda & T. Habe, 1961 - (HARPIDAE)
- Cithara, syn of: Genus Cythara H.C.F. Schumacher, 1817 (MANGELIIDAE)
- cithara, Eucithara coronata cithara (A.A. Gould, 1851) - (MANGELIIDAE)
- cithara, Mopalia imporcata cithara (S.S. Berry, 1951) - (MOPALIIDAE)
- cithara, Athleta cithara (J.B.P.A. Lamarck, 1822 †) - (VOLUTIDAE) (FOSSIL)
- cithara, Melo cithara J. Lightfoot, 1786 - syn of: Melo amphora (J. Lightfoot, 1786) - (VOLUTIDAE)
- cithara elata, Carinaria cithara elata G.B. Sowerby, 1895 - (CARINARIIDAE)
- cithara procumbens, Carinaria cithara procumbens J.J. Tesch, 1906 - (CARINARIIDAE)
- citharella, Cancellaria citharella J.B.P.A. Lamarck, 1822 - syn of: Cythara striata H.C.F. Schumacher, 1817 - (CANCELLARIIDAE)
- citharella, Japonia citharella A.A. Gould, 1859 - (CYCLOPHORIDAE)
- citharella, Ellobium citharella (A.E.M. Cossmann, 1898 †) - (ELLOBIIDAE) (FOSSIL)
- citharella, Eucithara citharella E.A. Smith, 1876 - syn of: Eucithara lyra (L.A. Reeve, 1846) - (MANGELIIDAE)
- Citharella, syn of: Genus Mangelia A. Risso, 1826 (MANGELIIDAE)
- citharella, Melanopsis citharella M.S. Merian, 1849 † - (MELANOPSIDAE) (FOSSIL)
- citharella, Macromphalus citharella (A.E.M. Cossmann, 1888 †) - (VANIKORIDAE) (FOSSIL)
- citharellus, Colubraria citharellus R. Tate, 1888 † - (COLUBRARIIDAE) (FOSSIL)
- citharina, Voluta citharina E. Forbes, 1846 † - (VOLUTIDAE) (FOSSIL)
- citharistensis, Xerotricha citharistensis J.R. Bourguignat in É.A.A. Locard, 1882 - syn of: Xerotricha apicina (J.B.P.A. Lamarck, 1822) - (HYGROMIIDAE)
- citharoidea, Domiporta citharoidea (W.L.H. Dohrn, 1862) - (MITRIDAE)
- citharoidea, Cancilla citharoidea (W.L.H. Dohrn, 1862) - syn of: Domiporta citharoidea (W.L.H. Dohrn, 1862) - (MITRIDAE)
- Citharomangelia, Genus Citharomangelia R.N. Kilburn, 1992 (MANGELIIDAE)
- Citharopsis, syn of: Genus Columbella J.B.P.A. Lamarck, 1799 (COLUMBELLIDAE)
- citharopsis, Volutopupa citharopsis D. Merle & al., 2014 † - (VOLUTIDAE) (FOSSIL)
- citharula, Microcithara citharula P.L. Duclos, 1835 - syn of: Microcithara harpiformis (G.B. I Sowerby, 1832) - (COLUMBELLIDAE)
- Cithna, Genus Cithna A. Adams, 1854 (LIOTIIDAE)
- citimum, Leptodesma citimum Whidborne † - (PTERINEIDAE) (FOSSIL)
- Citothyris, Genus Citothyris Ruzicka & Rehor, 1964 † (BIVALVIA INCERTAE SEDIS) (FOSSIL)
- citrana, Bellatara citrana K.V.W. Palmer, 1953 † - (PACHYCHILIDAE) (FOSSIL)
- citrea, Amastra mucronata citrea E.R. Sykes, 1896 - (AMASTRIDAE)
- citrea, Chama citrea J.F. Gmelin, 1791 - syn of: Chama macerophylla J.F. Gmelin, 1791 - (CHAMIDAE)
- citreum, Pomacea citreum (L.A. Reeve, 1856) - (AMPULLARIIDAE)
- citria, Drillia citria A.A. Olsson, 1922 † - (DRILLIIDAE) (FOSSIL)
- citrica, Pascula citrica (W.H. Dall, 1908) - (MURICIDAE)
- citrica, Tritonalia citrica W.H. Dall, 1919 - syn of: Urosalpinx circumtexta (R.E.C. Stearns, 1871) - (MURICIDAE)
- citrina, Achatinella citrina J.W. Mighels - syn of: Laminella citrina (L. Pfeiffer, 1848) - (ACHATINELLIDAE)
- citrina, Aegires citrina L.S.R. Bergh, 1875 - syn of: Aegires citrinus (L.S.R. Bergh, 1875) - (AEGIRIDAE)
- citrina, Laminella citrina (L. Pfeiffer, 1848) - (AMASTRIDAE)
- citrina, Xesta citrina (C. Linnaeus, 1758) - (ARIOPHANTIDAE)
- citrina, Bithynia tentaculata citrina (C. Linnaeus, 1758) - (BITHYNIIDAE)
- citrina, Cardita citrina J.B.P.A. Lamarck, 1819 - syn of: Cardita aviculina J.B.P.A. Lamarck, 1819 - (CARDITIDAE)
- citrina, Cerithium vulgatum citrina T.A. de M. Monterosato, 1878 - (CERITHIIDAE)
- citrina, Chromodoris citrina L.S.R. Bergh, 1874 - (CHROMODORIDIDAE)
- citrina, Tropidauchenia giardi citrina H. Nordsieck, 2002 - (CLAUSILIIDAE)
- citrina, Erosaria citrina (J.E. Gray, 1825) - (CYPRAEIDAE)
- citrina, Dendrodoris citrina (T.F. Cheeseman, 1881) - (DENDRODORIDIDAE)
- citrina, Goniodoris citrina J. Alder & A. Hancock, 1864 - (GONIODORIDIDAE)
- citrina, Gymnodoris citrina (L.S.R. Bergh, 1877) - (GYMNODORIDIDAE)
- citrina, Sulfurina citrina J.P.S. Grateloup, 1840 - syn of: Alcadia maxima (G.B. Sowerby, 1842) - (HELICINIDAE)
- citrina, Kellia citrina F.W. Hutton, 1883 - syn of: Neolepton antipodum (H. Filhol, 1880) - (KELLIIDAE)
- citrina, Acesta citrina H. Masahito & T. Habe, 1976 - (LIMIDAE)
- citrina, Littorina obtusata citrina P. Dautzenberg & H. Fischer, 1915 - (LITTORINIDAE)
- citrina, Pyrula citrina J.B.P.A. Lamarck, 1822 - syn of: Volema pyrum (J.F. Gmelin, 1791) - (MELONGENIDAE)
- citrina, Sohlia citrina L.A. Reeve, 1844 † - syn of: Sohlia carbonacea (R.B. Hinds, 1844 †) - (MITRIDAE) (FOSSIL)
- citrina, Pinaxia citrina J.T. Kuroda, 1930 - syn of: Pinaxia coronata A. Adams, 1853 - (MURICIDAE)
- citrina, Americoliva sayana citrina (C.W. Johnson, 1911) - (OLIVIDAE)
- citrina, Acanthodoris citrina A.E. Verrill, 1879 - syn of: Acanthodoris pilosa (P.C. Abildgaard in O.F. Müller, 1789) - (ONCHIDORIDIDAE)
- citrina, Ostrea citrina G.S. Poli, 1795 - syn of: Flexopecten glaber (C. Linnaeus, 1758) - (OSTREIDAE)
- citrina, Ostrea citrina J.F. Gmelin, 1791 - syn of: Flexopecten glaber (C. Linnaeus, 1758) - (OSTREIDAE)
- citrina, Brotia citrina (A. Brot, 1868) - (PACHYCHILIDAE)
- citrina, Partula dentifera citrina (W.H. Pease, 1866) - (PARTULIDAE)
- citrina, Flexopecten glaber citrina (J.F. Gmelin, 1791) - (PECTINIDAE)
- citrina, Berthellina citrina (W.P.E.S. Rüppell & F.S. Leuckart, 1828) - (PLEUROBRANCHIDAE)
- citrina, Nembrotha citrina (L.S.R. Bergh, 1875) - (POLYCERIDAE)
- citrina, Polycera citrina J. Alder, 1841 - syn of: Palio dubia (G.O. Sars, 1829) - (POLYCERIDAE)
- citrina, Tropidophora tricarinata citrina (G.B. Sowerby, 1843) - (POMATIIDAE)
- citrina, Linidiella citrina F.G. Thompson, 1987 - (PROSERPINELLIDAE)
- citrina, Odostomia citrina L. de Folin, 1869 - (PYRAMIDELLIDAE)
- citrina, Rhytida citrina F.W. Hutton, 1883 - (RHYTIDIDAE)
- citrina, Cyclas citrina T. Brown, 1844 - syn of: Sphaerium cornea (C. Linnaeus, 1767) - (SPHAERIIDAE)
- citrina, Melania citrina A. Brot, 1868 - syn of: Brotia citrina (A. Brot, 1868) - (THIARIDAE)
- citrina, Tritonia citrina Kröyer, 1847 - (TRITONIIDAE)
- citrina, Tylodina citrina L. de Joannis, 1853 - syn of: Tylodina perversa (J.F. Gmelin, 1791) - (TYLODINIDAE)
- citrina, Meretrix citrina J.B.P.A. Lamarck, 1818 - syn of: Pitar citrinus (J.B.P.A. Lamarck, 1818) - (VENERIDAE)
- citrina, Melo citrina G. Fischer von Waldheim, 1807 - syn of: Melo melo (J. Lightfoot, 1786) - (VOLUTIDAE)
- citrina campylonota, Xesta citrina campylonota (C.M. Tapparone-Canefri, 1883) - (ARIOPHANTIDAE)
- citrina dauphinensis, Erosaria citrina dauphinensis F.Jr. Lorenz, 2002 - (CYPRAEIDAE)
- citrina helvina, Laminella citrina helvina D.D. Baldwin, 1895 - (AMASTRIDAE)
- citrina obiana, Xesta citrina obiana O.F. von Möllendorff, 1902 - (ARIOPHANTIDAE)
- citrina semiventula, Laminella citrina semiventula F. Borcherding, 1906 - (AMASTRIDAE)
- citrina solangeae, Erosaria citrina solangeae L. Bozzetti, 2014 - (CYPRAEIDAE)
- citrina strubelli, Xesta citrina strubelli (O. Böttger, 1891) - (ARIOPHANTIDAE)
- citrina typica, Xesta citrina typica H.A. Pilsbry, 1889 - (ARIOPHANTIDAE)
- citrinella, Alinda biplicata citrinella (E.A. Rossmässler, 1838) - (CLAUSILIIDAE)
- citrinella, Sulfurina citrinella (O.F. von Möllendorff, 1893) - (HELICINIDAE)
- citrinellus, Drymaeus scitulus citrinellus L. Pfeiffer, 1853 - (BULIMULIDAE)
- citrinensis, Ampullinopsis citrinensis K.V.W. Palmer, 1953 † - (AMPULLINIDAE) (FOSSIL)
- citrinicolor, Erosaria helvola citrinicolor (C. Linnaeus, 1758) - (CYPRAEIDAE)
- citrinocallosa, Eutrochatella citrinocallosa A.J. Wagner, 1911 - (HELICINIDAE)
- citrinoide, Cerithium citrinoide W. Kobelt, 1893 - syn of: Cerithium columna G.B. I Sowerby, 1834 - (CERITHIIDAE)
- citrinoides, Melania citrinoides A. Brot, 1886 - syn of: Brotia citrina (A. Brot, 1868) - (THIARIDAE)
- citrinoideum, Cardium citrinoideum B. Phillips, 1829 † - (CARDIIDAE) (FOSSIL)
- citrinolabris, Alcadia citrinolabris (C.B. Adams, 1849) - (HELICINIDAE)
- citrinovitrea, Simpulopsis citrinovitrea (S. Moricand, 1836) - (SIMPULOPSIDAE)
- citrinula, Helix citrinula E.A. Rossmässler, 1852 - syn of: Faustina faustina associata (E.A. Rossmässler, 1835) - (HELICIDAE)
- citrinum, Buccinum citrinum L.A. Reeve, 1846 - syn of: Buccinanops paytensis (L.C. Kiener, 1834) - (BUCCINIDAE)
- citrinum, Acanthocardia citrinum Š. Brusina, 1865 - syn of: Acanthocardia tuberculata (C. Linnaeus, 1758) - (CARDIIDAE)
- citrinum, Laevicardium citrinum W. Wood, 1815 - syn of: Laevicardium serratum oviputamen (L.A. Reeve, 1844) - (CARDIIDAE)
- citrinum, Cerithium citrinum Sowerby, 1855 - (CERITHIIDAE)
- citrinum, Vexillum citrinum (J.F. Gmelin, 1791) - (COSTELLARIIDAE)
- citrinum, Siphopteron citrinum (C.H. Carlson & P.J. Hoff, 1974) - (GASTROPTERIDAE)
- citrinum, Farcimen seminudum citrinum L.O. Alcalde, 1945 - (MEGALOMASTOMIDAE)
- citrinum, Monoceros citrinum G.B. I Sowerby, 1835 - syn of: Acanthina unicornis (J.G. Bruguière, 1789) - (MURICIDAE)
- citrinum, Granicorium citrinum K.L. Lamprell & J.M. Healy, 1999 - (VENERIDAE)
- citrinum compressa, Vexillum citrinum compressa (G.B. II Sowerby, 1828) - (COSTELLARIIDAE)
- citrinum filiareginae, Vexillum citrinum filiareginae J.M. Cate, 1961 - syn of: Vexillum filiareginae (J.M. Cate, 1961) - (COSTELLARIIDAE)
- citrinus, Aegires citrinus (L.S.R. Bergh, 1875) - (AEGIRIDAE)
- citrinus, Aegires citrinus A. Pruvot-Fol, 1930 - syn of: Aegires pruvotfolae S.J. Fahey & T.M. Gosliner, 2004 - (AEGIRIDAE)
- citrinus, Stylocheilus citrinus P.C.A.S.L. Rang, 1828 - syn of: Stylocheilus longicauda (J.R.C. Quoy & J.P. Gaimard, 1825) - (APLYSIIDAE)
- citrinus, Amphidromus perversus citrinus (E.C. Von Martens, 1867) - (CAMAENIDAE)
- citrinus, Joculator citrinus A. Cecalupo & I. Perugia, 2013 - (CERITHIOPSIDAE)
- citrinus, Conus citrinus L.C. Kiener, 1846 - syn of: Floraconus cocceus (L.A. Reeve, 1844) - (CONIDAE)
- citrinus, Conus citrinus J.F. Gmelin, 1791 - syn of: Stephanoconus regius (J.F. Gmelin, 1791) - (CONIDAE)
- citrinus, Brachidontes citrinus P.F. Röding, 1798 - syn of: Brachidontes modiolus (C. Linnaeus, 1767) - (MYTILIDAE)
- citrinus, Mytilus citrinus P.F. Röding, 1798 - syn of: Brachidontes modiolus (C. Linnaeus, 1767) - (MYTILIDAE)
- citrinus, Mytilus citrinus P.F. Röding, 1798 - syn of: Brachidontes modiolus (C. Linnaeus, 1767) - (MYTILIDAE)
- citrinus, Polinices citrinus (R.A. Philippi, 1851) - (NATICIDAE)
- citrinus, Canarium mutabile citrinus A. D'Attilio, 1980 - (STROMBIDAE)
- citrinus, Pitar citrinus (J.B.P.A. Lamarck, 1818) - (VENERIDAE)
- citrinvitreus, Eudiopus citrinvitreus S. Moricand, 1836 - syn of: Simpulopsis citrinovitrea (S. Moricand, 1836) - (SIMPULOPSIDAE)
- citrocarnea, Bathytellina citrocarnea J.T. Kuroda & T. Habe, 1958 - (TELLINIDAE)
- citronella, Cryoturris citronella (W.H. Dall, 1886) - (MANGELIIDAE)
- citronella, Kurtziella citronella (W.H. Dall, 1886) - syn of: Cryoturris citronella (W.H. Dall, 1886) - (MANGELIIDAE)
- citronellus, Bulimus citronellus G.F. Angas, 1879 - syn of: Mesembrinus sulphureus (L. Pfeiffer, 1857) - (BULIMULIDAE)
- citrullus, Patella citrullus A.A. Gould, 1846 - (PATELLIDAE)
- citrusensis, Lyria citrusensis K.V.W. Palmer, 1953 † - (VOLUTIDAE) (FOSSIL)
- Cittarium, Genus Cittarium R.A. Philippi, 1847 (TEGULIDAE)
- Citula, syn of: Genus Cistulops F.C. Baker, 1924 (POMATIIDAE)
- ciucasiana, Alopia nefasta ciucasiana A.V. Grossu, 1969 - (CLAUSILIIDAE)
- ciuda, Rumina ciuda T.A. de M. Monterosato, 1892 - syn of: Rumina decollata (C. Linnaeus, 1758) - (SUBULINIDAE)
- ciuppi, Clavilithes ciuppi (Gregorio, 1880 †) - (FASCIOLARIIDAE) (FOSSIL)
- cives, Cyclonema cives J. Perner, 1903 † - (PLATYCERATIDAE) (FOSSIL)
- civica, Cardiolucina civica (M. Yokoyama, 1927) - (LUCINIDAE)
- civis, Tremanotus civis (J. Perner, 1903 †) - (BUCANIIDAE) (FOSSIL)
- civis, Phragmostoma civis J. Perner, 1903 † - syn of: Tremanotus civis (J. Perner, 1903 †) - (BUCANIIDAE) (FOSSIL)
- civitella, Borsonella civitella W.H. Dall, 1919 - syn of: Borsonella bartschi (R. Arnold, 1903) - (BORSONIIDAE)
- civitella, Odostomia civitella T.S. Oldroyd, 1925 † - (PYRAMIDELLIDAE) (FOSSIL)
- civitellensis, Phymatoceras civitellensis Venturi 1981 † - (PHYMATOCERATIDAE) (FOSSIL)
- claasseni, Chama claasseni I.H. Jonas, 1846 - syn of: Chama pacifica W.J. Broderip, 1835 - (CHAMIDAE)
- clabaughikinsorum, Curtocaprina clabaughikinsorum Mitchell, 2013 † - (ICHTHYOSARCOLITIDAE) (FOSSIL)
- clactonensis, Paludina clactonensis S.V. Wood † - (VIVIPARIDAE) (FOSSIL)
- cladara, Daphnella cladara A.V. Sysoev & P. Bouchet, 2001 - (RAPHITOMIDAE)
- cladara, Xanthodaphne cladara A.V. Sysoev, 1997 - (RAPHITOMIDAE)
- Cladiscites, Genus Cladiscites Mojsisovics , 1879 † (CLADISCITIDAE) (FOSSIL)
- CLADISCITIDAE Zittel, 1884 † - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-CERATITIDA [Order]-ARCESTOIDEA [Superfamily]) (FOSSIL)
- Cladoceramus, Genus Cladoceramus Seitz, 1961 † (INOCERAMIDAE) (FOSSIL)
- cladocorae, Heteranomia cladocorae P. Parenzan, 1974 - syn of: Heteranomia squamula (C. Linnaeus, 1758) - (ANOMIIDAE)
- Cladopoda, syn of: Genus Serpulorbis M. Sassi, 1827 (VERMETIDAE)
- cladoptyx, Diceratoptyx cladoptyx H.A. Pilsbry, 1905 - (CLAUSILIIDAE)
- claemoniacus, Malleus claemoniacus L.A. Reeve, 1858 - (MALLEIDAE)
- claiboplata, Venericor claiboplata (Gardner & E. Bowles, 1939 †) - (CARDITIDAE) (FOSSIL)
- claibornense, Agnocardia claibornense (T.H. Aldrich, 1911 †) - (CARDIIDAE) (FOSSIL)
- claibornense, Periploma claibornense † - (PERIPLOMATIDAE) (FOSSIL)
- claibornensis, Lacinia claibornensis K.V.W. Palmer, 1937 † - (BUCCINIDAE) (FOSSIL)
- claibornensis, Conus claibornensis Lea, 1833 † - syn of: Conus sauridens T.A. Conrad, 1833 † - (CONIDAE) (FOSSIL)
- claibornensis, Fissurella claibornensis Lea, 1833 † - syn of: Diodora tenebrosa T.A. Conrad, 1833 † - (FISSURELLIDAE) (FOSSIL)
- claibornensis, Oniscidia claibornensis Garvie, 2013 † - (HARPIDAE) (FOSSIL)
- claibornensis, Miltha claibornensis † - (LUCINIDAE) (FOSSIL)
- claibornensis, Saxolucina claibornensis C.C. Stewart 1930 † - (LUCINIDAE) (FOSSIL)
- claibornensis, Plastomiltha claibornensis (T.A. Conrad, 1865 †) - (LUCINIDAE) (FOSSIL)
- claibornensis, Triodopsis claibornensis A. Lutz, 1950 - (POLYGYRIDAE)
- claibornensis, Oryctomya claibornensis (Dall 1898) † - (PSAMMOBIIDAE) (FOSSIL)
- claibornensis, Pyrgulina claibornensis T.H. Aldrich, 1911 † - (PYRAMIDELLIDAE) (FOSSIL)
- claibornensis, Retusa claibornensis T.H. Aldrich, 1911 † - (RETUSIDAE) (FOSSIL)
- claibornensis, Melania claibornensis A. Heilprin, 1879 † - (THIARIDAE) (FOSSIL)
- claibornensis, Mesalia claibornensis † - (TURRITELLIDAE) (FOSSIL)
- claibornensis, Lampsilis straminea claibornensis I. Lea, 1838 - (UNIONIDAE)
- claibornensis, Orthoyoldia claibornensis (T.A. Conrad, 1848 †) - (YOLDIIDAE) (FOSSIL)
- Claibornia, Subgenus Cirsochilus (Claibornia) Palmer, 1937 † (ATAPHRIDAE) (FOSSIL)
- Claibornicardia, Subgenus Venericardia (Claibornicardia) H.B. Stenzel & A. Krause, 1957 † (CARDITIDAE) (FOSSIL)
- Claibornites, Genus Claibornites C.C. Stewart, 1930 † (LUCINIDAE) (FOSSIL)
- Clairbornicardia, syn of: Subgenus Venericardia (Claibornicardia) H.B. Stenzel & A. Krause, 1957 † (CARDITIDAE) (FOSSIL)
- clairi, Fortuna clairi W.R. Schlickum & F. Strauch, 1972 † - (SUBULINIDAE) (FOSSIL)
- clairi, Viviparus clairi Schlickum & Puisségur, 1977 † - (VIVIPARIDAE) (FOSSIL)
- clairvillia, Naninia clairvillia (A.E.J. Férussac, 1822) - (ARIOPHANTIDAE)
- claisei, Bythiospeum claisei Callot-Girardi, 2017 - (HYDROBIIDAE)
- clallamense, Epitonium clallamense J.W. Durham, 1937 † - (EPITONIIDAE) (FOSSIL)
- clallamensis, Aforia clallamensis (C.S. Weaver †) - (COCHLESPIRIDAE) (FOSSIL)
- clallamensis, Propeamussium clallamensis (R. Arnold †) - (PROPEAMUSSIIDAE) (FOSSIL)
- clallamensis, Solen clallamensis Clark & R. Arnold 1923 † - (SOLENIDAE) (FOSSIL)
- clallamensis, Tellina clallamensis Reagan † - syn of: Tellina emacerata T.A. Conrad, 1849 † - (TELLINIDAE) (FOSSIL)
- Clambites, Genus Clambites Rollier, 1922 † (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- Clameia, Genus Clameia H.D. Boeters & E. Gittenberger, 1990 (MOITESSIERIIDAE)
- Clamella, syn of: Genus Calmella C.N.E. Eliot, 1906 (FLABELLINIDAE)
- clamosseum, Parvamussium clamosseum J. Marwick, 1953 † - (PROPEAMUSSIIDAE) (FOSSIL)
- clampensis, Anadara clampensis Sgarbossa 1977 † - (ARCIDAE) (FOSSIL)
- Clamturris, syn of: Genus Xenuroturris T. Iredale, 1929 (TURRIDAE)
- Clamys, syn of: Genus Chlamys P.F. Röding, 1798 (PECTINIDAE)
- clancula, Basterotia clancula R. von Cosel, 1995 - (BASTEROTIIDAE)
- Clanculella, syn of: Subgenus Clanculus (Clanculopsis) T.A. de M. Monterosato, 1888 (TROCHIDAE)
- Clanculopsis, Subgenus Clanculus (Clanculopsis) T.A. de M. Monterosato, 1888 (TROCHIDAE)
- clanculus, Hemiconus clanculus C. Mayer, 1891 † - (CONIDAE) (FOSSIL)
- Clanculus, Genus Clanculus P.D. Montfort, 1810 (TROCHIDAE)
- clandestina, Teratobaicalia clandestina (J. Beckmann & Y.I. Starobogatov, 1975) - (AMNICOLIDAE)
- clandestina, Baicaliella clandestina T.Y. Sitnikova, 1991 - syn of: Teratobaicalia humerosa (J. Beckmann & Y.I. Starobogatov, 1975) - (AMNICOLIDAE)
- clandestina, Batillaria bouei clandestina G.P. Deshayes, 1864 † - (BATILLARIIDAE) (FOSSIL)
- clandestina, Manaria clandestina P. Bouchet & A. Warén, 1986 - (BUCCINIDAE)
- clandestina, Clathurella clandestina G.P. Deshayes, 1863 - syn of: Kermia pumila clandestina (G.P. Deshayes, 1863) - (CLATHURELLIDAE)
- clandestina, Isabellaria clandestina (E.A. Rossmässler, 1857) - (CLAUSILIIDAE)
- clandestina, Gemmuloborsonia clandestina N. Puillandre, Cruaud & Y.I. Kantor, 2010 - (CLAVATULIDAE)
- clandestina, Palmadusta clandestina (C. Linnaeus, 1767) - (CYPRAEIDAE)
- clandestina, Palmadusta clandestina T. Iredale, 1939 - syn of: Palmadusta clandestina candida (W.H. Pease, 1865) - (CYPRAEIDAE)
- clandestina, Thordisa clandestina L.S.R. Bergh, 1884 - (DISCODORIDIDAE)
- clandestina, Limea clandestina (C. Salas, 1994) - (LIMIDAE)
- clandestina, Notolimea clandestina C. Salas, 1994 - syn of: Limea clandestina (C. Salas, 1994) - (LIMIDAE)
- clandestina, Granulina clandestina (G.B. Brocchi, 1814) - (MARGINELLIDAE)
- clandestina, Cypraeolina clandestina (Brochhi, 1814 †) - (MARGINELLIDAE) (FOSSIL)
- clandestina, Mitra clandestina L.A. Reeve, 1845 - syn of: Mitromorpha mediterranea C. Mifsud, 2001 - (MITRIDAE)
- clandestina, Kermia clandestina G.P. Deshayes, 1863 - syn of: Kermia pumila clandestina (G.P. Deshayes, 1863) - (RAPHITOMIDAE)
- clandestina, Kermia pumila clandestina (G.P. Deshayes, 1863) - (RAPHITOMIDAE)
- clandestina, Retusa clandestina Montpereux, 1831 - syn of: Retusa obtusa (G. Montagu, 1808) - (RETUSIDAE)
- clandestina, Rissoina clandestina (C.B. Adams, 1852) - syn of: Schwartziella clandestina (C.B. Adams, 1852) - (RISSOINIDAE)
- clandestina, Gibbula clandestina E. Rolán & J. Templado, 2001 - (TROCHIDAE)
- clandestina, Pleurotoma clandestina G.P. Deshayes, 1863 - syn of: Kermia pumila clandestina (G.P. Deshayes, 1863) - (TURRIDAE)
- clandestina, Schwartziella clandestina (C.B. Adams, 1852) - (ZEBINIDAE)
- clandestina candida, Palmadusta clandestina candida (W.H. Pease, 1865) - (CYPRAEIDAE)
- clandestina moniliaris, Palmadusta clandestina moniliaris (J.B.P.A. Lamarck, 1810) - (CYPRAEIDAE)
- clandestina pallida, Linatella clandestina pallida H. Barth, 1996 - syn of: Gelagna pallida (M. Parth, 1996) - (RANELLIDAE)
- clandestina passerina, Palmadusta clandestina passerina (J.C. Melvill, 1888) - (CYPRAEIDAE)
- clandestina subsuturalis, Isabellaria clandestina subsuturalis (C.A. Westerlund, 1893) - (CLAUSILIIDAE)
- clandestinatous, Conus clandestinatous T. Shikama, 1979 - syn of: Kioconus voluminalis (L.A. Reeve, 1843) - (CONIDAE)
- clandestinella, Granulina clandestinella (A.R.J.B. Bavay, 1908) - (MARGINELLIDAE)
- clandestinum, Leiorhagium clandestinum M. Haase & S. Zielske, 2015 - (HYDROBIIDAE)
- clandestinum, Cymatium clandestinum J.B.P.A. Lamarck, 1816 - syn of: Gelagna succincta (C. Linnaeus, 1771) - (RANELLIDAE)
- clandestinus, Plesiotriton clandestinus J.M. Pacaud, Ledon & Loubry, 2015 - (CANCELLARIIDAE)
- clandestinus, Conus clandestinus L.W. Dillwyn, 1817 - syn of: Pionoconus magus (C. Linnaeus, 1758) - (CONIDAE)
- clandestinus, Trochulus clandestinus (J.D.W. Hartmann, 1821) - (HYGROMIIDAE)
- clandestinus, Tapes clandestinus C. Mayer, 1860 † - (VENERIDAE) (FOSSIL)
- clandestinus purpuratus, Conus clandestinus purpuratus T. Shikama, 1979 - syn of: Kioconus shikamai (H.E. Coomans, R.G. Moolenbeek & E. Wils, 1985) - (CONIDAE)
- clandestinus putonii, Trochulus clandestinus putonii (S. Clessin, 1874) - (HYGROMIIDAE)
- claneophila, Olivancillaria claneophila (P.L. Duclos, 1835 †) - (OLIVIDAE) (FOSSIL)
- Claneophila, syn of: Genus Olivancillaria D'Orbigny, 1840 (OLIVIDAE)
- clanguloides, Clanculus clanguloides Wood, 1828 - (TROCHIDAE)
- clanguloides fijiensis, Clanculus clanguloides fijiensis H.S. Ladd, 1845 - (TROCHIDAE)
- clangulus, Clanculus clangulus (W. Wood, 1828) - (TROCHIDAE)
- Clangulus, syn of: Genus Clanculus P.D. Montfort, 1810 (TROCHIDAE)
- clanzigi, Olivella clanzigi P. Lozouet, 1992 † - (OLIVELLIDAE) (FOSSIL)
- clapierensis, Mucrodactylites clapierensis Guex, 1972 † - (DACTYLIOCERATIDAE) (FOSSIL)
- clappa, Cerodrillia clappa P. Bartsch & H.A. Rehder, 1939 - syn of: Cerodrillia clappi P. Bartsch & H.A. Rehder, 1939 - (DRILLIIDAE)
- clappertoni, Anodon clappertoni C.D.E. König, 1826 - syn of: Chambardia rubens (J.B.P.A. Lamarck, 1819) - (UNIONIDAE)
- clappi, Cerion clappi (C.J. Maynard, 1894) - (CERIONIDAE)
- clappi, Discus clappi H.A. Pilsbry, 1924 - (DISCIDAE)
- clappi, Cerodrillia clappi P. Bartsch & H.A. Rehder, 1939 - (DRILLIIDAE)
- clappi, Carychium clappi L.R. Hubricht, 1959 - (ELLOBIIDAE)
- clappi, Gastrocopta clappi V. Sterki, 1909 - (GASTROCOPTIDAE)
- clappi, Helicina clappi H.A. Pilsbry, 1909 - (HELICINIDAE)
- clappi, Sonorella clappi (H.A. Pilsbry & J.H. Ferriss, 1915) - (HELMINTHOGLYPTIDAE)
- clappi, Poteria clappi C. de la Torre & P. Bartsch, 1942 - (NEOCYCLOTIDAE)
- clappi, Euvaricella clappi (H.A. Pilsbry, 1907) - (OLEACINIDAE)
- clappi, Oreohelix clappi J.H. Ferriss, 1904 - (OREOHELICIDAE)
- clappi, Lignopholas clappi H. Turner, 1955 - (PHOLADIDAE)
- clappi, Chondropometes vignalense clappi C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- clappi, Terebra clappi H.A. Pilsbry, 1920, 1921 - syn of: Strioterebrum plumbeum (J.R.C. Quoy & J.P. Gaimard, 1833) - (TEREBRIDAE)
- clappi, Teredo clappi P. Bartsch, 1923 - (TEREDINIDAE)
- clappi, Teredo clappi P.B. Sivickis, 1928 - syn of: Dicyathifer mannii (B.H. Wright, 1866) - (TEREDINIDAE)
- clappi, Planogyra clappi H.A. Pilsbry, 1898 - (VALLONIIDAE)
- clappi, Paravitrea clappi H.A. Pilsbry, 1898 - (ZONITIDAE)
- clappi emigrans, Oreohelix clappi emigrans H.A. Pilsbry & J.H. Ferriss, 1910 - (OREOHELICIDAE)
- Clappia, Subgenus Lithoglyphus (Clappia) B. Walker, 1909 (LITHOGLYPHIDAE)
- Clappiella, Subgenus Gastrodonta (Clappiella) F.C. Baker, 1929 (GASTRODONTIDAE)
- clappy, Planogyra clappy H.A. Pilsbry, 1898 - syn of: Planogyra clappi H.A. Pilsbry, 1898 - (VALLONIIDAE)
- clara, Achatinella clara L. Pfeiffer - syn of: Leptachatina striatula (A.A. Gould, 1845) - (ACHATINELLIDAE)
- clara, Strophiops clara C.J. Maynard, 1924 - (CERIONIDAE)
- clara, Horologica clara A. Cecalupo & I. Perugia, 2012 - (CERITHIOPSIDAE)
- clara, Froekenia clara W.E. Hoyle, 1904 - (CIRROTEUTHIDAE)
- clara, Luria clara J.S. Gaskoin, 1851 - syn of: Luria isabella (C. Linnaeus, 1758) - (CYPRAEIDAE)
- clara, Clavus clara (L.A. Reeve, 1845) - (DRILLIIDAE)
- clara, Hirasea clara H.A. Pilsbry, 1902 - (ENDODONTIDAE)
- clara, Eulima clara (A. Adams, 1861) - (EULIMIDAE)
- clara, Eulima clara B. Wade, 1926 † - (EULIMIDAE) (FOSSIL)
- clara, Leiostraca clara A. Adams, 1861 - syn of: Eulima clara (A. Adams, 1861) - (EULIMIDAE)
- clara, Zilchogyra clara (K.H.J. Thiele, 1927) - (HELICODISCIDAE)
- clara, Dentimargo clara K.H.J. Thiele, 1925 - (MARGINELLIDAE)
- clara, Mitra clara G.B. Sowerby, 1874 - syn of: Mitra semiferruginea L.A. Reeve, 1845 - (MITRIDAE)
- clara, Nassa clara F.P. Marrat, 1877 - syn of: Nassarius clarus (F.P. Marrat, 1877) - (NASSARIIDAE)
- clara, Pseudoportlandia clara (R.J.L. Guppy, 1873 †) - (NUCULANIDAE) (FOSSIL)
- clara, Oliva clara F.P. Marrat, 1871 - syn of: Oliva bulbiformis P.L. Duclos, 1835 - (OLIVIDAE)
- clara, Aclyvolva clara C.N. Cate, 1973 - syn of: Calcarovula gracillima (E.A. Smith, 1901) - (OVULIDAE)
- clara, Partula clara W.H. Pease, 1864 - (PARTULIDAE)
- clara, Anculosa clara J.G. Anthony, 1854 - (PLEUROCERIDAE)
- clara, Turbonilla clara K.H.J. Thiele, 1925 - (PYRAMIDELLIDAE)
- clara, Megastomia clara (S. Nomura, 1936) - (PYRAMIDELLIDAE)
- clara, Besla clara E. Saurin, 1959 - (PYRAMIDELLIDAE)
- clara, Odostomia clara J.W. Brazier, 1877 - (PYRAMIDELLIDAE)
- clara, Gymnobela clara K.H.J. Thiele, 1925 - (RAPHITOMIDAE)
- clara, Onoba clara Güller & Zelaya, 2017 - (RISSOIDAE)
- clara, Subulona clara (H.A. Pilsbry, 1919) - (SUBULINIDAE)
- clara, Solariorbis clara N.F. Sohl, 1960 † - (TORNIDAE) (FOSSIL)
- clara, Pleurotoma clara E.C. Von Martens, 1881 - syn of: Aforia goniodes (R.B. Watson, 1881) - (TURRIDAE)
- clara, Pleurotoma clara L.A. Reeve, 1845 - syn of: Clavus clara (L.A. Reeve, 1845) - (TURRIDAE)
- clara, Liocallonia clara (B.H. Wright in L. Pfeiffer, 1865) - (UROCOPTIDAE)
- clara, Fulgoraria clara (G.B. III Sowerby, 1914) - (VOLUTIDAE)
- clara, Scissileda clara (J.C. Melvill, 1898) - (YOLDIIDAE)
- clara noguchi, Fulgoraria clara noguchi S. Hayashi, 1960 - syn of: Fulgoraria noguchii (S. Hayashi, 1960) - (VOLUTIDAE)
- clarae, Cadlina clarae H.F.A. von Ihering, 1880 - syn of: Cadlina pellucida (A. Risso, 1826) - (CADLINIDAE)
- clarae, Cerithium clarae Vasseur, 1881 † - (CERITHIIDAE) (FOSSIL)
- clarae, Boucardicus clarae K.C. Emberton, 1994 - (CYCLOPHORIDAE)
- clarae, Fusinus clarae P. Russo & W. Renda in P. Russo, 2013 - (FASCIOLARIIDAE)
- clarae, Cadulus clarae C.J. Maury, 1910 † - (GADILIDAE) (FOSSIL)
- clarae, Bela clarae A. Peñas & E. Rolán, 2008 - (MANGELIIDAE)
- clarae, Spiralix clarae Quiñonero-Salgado, Ruiz-Cobo & Rolán, 2017 - (MOITESSIERIIDAE)
- clarae, Crassispira nana clarae A.E.M. Cossmann & G. Pissarro, 1913 † - (PSEUDOMELATOMIDAE) (FOSSIL)
- clarae, Claraia clarae Emmrich, 1844 † - syn of: Claraia clarai (Emmrich, 1844 †) - (PTERINOPECTINIDAE) (FOSSIL)
- clarae, Eulimella clarae A. Peñas & E. Rolán, 2016 - (PYRAMIDELLIDAE)
- clarae, Alvania clarae I. Nofroni & M. Pizzini, 1991 - (RISSOIDAE)
- clarae, Angulaticeras clarae (Pompeckj 1895 †) - (SCHLOTHEIMIIDAE) (FOSSIL)
- clarai, Pseudomonotis clarai Emmrich, 1844 † - syn of: Claraia clarai (Emmrich, 1844 †) - (PSEUDOMONOTIDAE) (FOSSIL)
- clarai, Avicula clarai Emmrich, 1844 † - syn of: Claraia clarai (Emmrich, 1844 †) - (PTERIIDAE) (FOSSIL)
- clarai, Claraia clarai (Emmrich, 1844 †) - (PTERINOPECTINIDAE) (FOSSIL)
- Claraia, Genus Claraia Bittner, 1901 † (PTERINOPECTINIDAE) (FOSSIL)
- CLARAIIDAE Gavrilova, 1996 † - Family (BIVALVIA-PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-PTERINOPECTINOIDEA [Superfamily]) (FOSSIL)
- Claraioides, Genus Claraioides Fang, 1993 † (PTERINOPECTINIDAE) (FOSSIL)
- claramontanum, Eutrephoceras claramontanum Kuhn, 1939 † - (NAUTILIDAE) (FOSSIL)
- clarandum, Cerithiomorpha clarandum (F. Stoliczka, 1868 †) - (CERITHIOIDEA (UNASSIGNED)) (FOSSIL)
- claranus, Bahiensis claranus W.L.H. Dohrn, 1882 - syn of: Cyclodontina sectilabris L. Pfeiffer, 1850 - (ODONTOSTOMIDAE)
- Claraxis, syn of: Genus Granosolarium Sacco, 1892 † (ARCHITECTONICIDAE) (FOSSIL)
- clarckeanum, Pisidium clarckeanum G. Nevill, 1871 - syn of: Pisidium clarkeanum G. Nevill, 1871 - (SPHAERIIDAE)
- clardyi, Didymoceras clardyi Cobban & Kennedy, 1993a † - (NOSTOCERATIDAE) (FOSSIL)
- Clarenciella, Genus Clarenciella Beu & Marshall, 2014 † (COCHLIOPIDAE) (FOSSIL)
- clarendonensis, Aporrhais clarendonensis (Wrigley, 1938 †) - (APORRHAIDAE) (FOSSIL)
- clarendonensis, Poteria clarendonensis J.P.E. Morrison, 1955 - syn of: Poteria taylori (P. Bartsch, 1942) - (NEOCYCLOTIDAE)
- clareti, Ancyloceras clareti de Rouville, 1857 † - (ANCYLOCERATIDAE) (FOSSIL)
- clareti, Subthurmannia clareti Le Hégarat, 1973 † - (NEOCOMITIDAE) (FOSSIL)
- claretta, Odostomia claretta S. Nomura, 1936 - syn of: Megastomia clara (S. Nomura, 1936) - (PYRAMIDELLIDAE)
- clariceae, Trivirostra clariceae C.N. Cate, 1979 - (TRIVIIDAE)
- clarificata, Acharax clarificata R.K. Dell, 1995 - (SOLEMYIDAE)
- clariformis, Laevilitorina clariformis H.B. Preston, 1916 - syn of: Laevilitorina claviformis H.B. Preston, 1916 - (LITTORINIDAE)
- clarimaculosa, Hemiliostraca clarimaculosa (B.K. Raines, 2003) - (EULIMIDAE)
- clarinda, Turbonilla clarinda P. Bartsch, 1912 - (PYRAMIDELLIDAE)
- clarinda, Phymorhynchus clarinda (W.H. Dall, 1908) - (RAPHITOMIDAE)
- clarinvalia, Helix clarinvalia A. Moquin-Tandon, 1855 - syn of: Chilostoma fontenillii alpinum (A. Michaud, 1831) - (HELICIDAE)
- clariondi, Fidelites clariondi (Petter, 1959 †) - (AGONIATITIDAE) (FOSSIL)
- Clariondites, Genus Clariondites Bockwinkel & al., 2009 † (PETTEROCERATIDAE) (FOSSIL)
- clarionense, Laevicardium clarionense (L.G. Hertlein & A.M. Strong, 1947) - (CARDIIDAE)
- clarionensis, Tornatellides clarionensis W.H. Dall, 1926 - (ACHATINELLIDAE)
- clarionensis, Lirobarleeia clarionensis (P. Bartsch, 1911) - (BARLEEIIDAE)
- clarionensis, Pseudochama clarionensis G. Willett, 1938 - (CHAMIDAE)
- clarionensis, Bellaspira clarionensis J.H. McLean & L.H. Poorman, 1970 - (DRILLIIDAE)
- clarionensis, Lepidozona clarionensis A. Ferreira, 1983 - (ISCHNOCHITONIDAE)
- clarionensis, Ctena clarionensis L.G. Hertlein & A.M. Strong, 1946 - (LUCINIDAE)
- clarionensis, Alvinia clarionensis P. Bartsch, 1911 - syn of: Lirobarleeia clarionensis (P. Bartsch, 1911) - (RISSOIDAE)
- clarionensis, Succinea clarionensis W.H. Dall, 1926 - (SUCCINEIDAE)
- clarionensis, Thysanophora clarionensis W.H. Dall, 1926 - (THYSANOPHORIDAE)
- clarionensis, Turritella clarionensis L.G. Hertlein & A.M. Strong, 1951 - (TURRITELLIDAE)
- clarissa, Staphylaea limacina clarissa F.Jr. Lorenz, 1989 - (CYPRAEIDAE)
- clarissima, Anisocardia clarissima (J. Leckenby, 1859 †) - (ARCTICIDAE) (FOSSIL)
- clarissima, Albinaria praeclara clarissima (H. Nordsieck, 1972) - (CLAUSILIIDAE)
- clarissima, Coelostylina clarissima Dietz, 1911 † - (COELOSTYLINIDAE) (FOSSIL)
- clarissimus, Mesembrinus dominicus clarissimus H.A. Pilsbry, 1946 - (BULIMULIDAE)
- claritae, Scholvienia claritae H. Strebel, 1910 - (MEGASPIRIDAE)
- claritaensis, Tetrentodon claritaensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- clarkae, Microcystina clarkae W.J.M. Maassen, 2000 - (ARIOPHANTIDAE)
- clarkae, Coliracemata clarkae W.F. Ponder, H. Fukuda & A. Hallan, 2014 - (CLENCHIELLIDAE)
- clarkeana, Sigatica clarkeana T.H. Aldrich, 1887 † - (NATICIDAE) (FOSSIL)
- clarkeana, Chlamys clarkeana † - (PECTINIDAE) (FOSSIL)
- clarkeana, Pleurofusia clarkeana (T.H. Aldrich, 1894 †) - (TURRIDAE) (FOSSIL)
- clarkeanum, Pisidium clarkeanum G. Nevill, 1871 - (SPHAERIIDAE)
- clarkeanum dhulikhelensis, Pisidium clarkeanum dhulikhelensis H. Nesemann & S. Sharma, 2005 - syn of: Pisidium clarkeanum G. Nevill, 1871 - (SPHAERIIDAE)
- clarkei, Amnicola clarkei H.A. Pilsbry, 1917 - (AMNICOLIDAE)
- clarkei, Architeuthis clarkei C.W. Robson, 1933 - syn of: Architeuthis dux J.J.S. Steenstrup, 1857 - (ARCHITEUTHIDAE)
- clarkei, Aturia clarkei Teichert, 1944 † - (ATURIIDAE) (FOSSIL)
- clarkei, Chaoceras clarkei Yatskov, 1990 † - syn of: Naplesites iynx (A.H. Clarke, 1898 †) - (BELOCERATIDAE) (FOSSIL)
- clarkei, Tasmeuthria clarkei (J.E. Tenison-Woods, 1876) - (BUCCINIDAE)
- clarkei, Siphonalia clarkei J.E. Tenison-Woods, 1876 - syn of: Tasmeuthria clarkei (J.E. Tenison-Woods, 1876) - (BUCCINIDAE)
- clarkei, Buccinulum clarkei J.E. Tenison-Woods, 1876 - syn of: Tasmeuthria clarkei (J.E. Tenison-Woods, 1876) - (BUCCINIDAE)
- clarkei, Carydium clarkei Bailey, 1986 † - (CARYDIIDAE) (FOSSIL)
- clarkei, Silberlingitoides clarkei (Smith, 1914 †) - (CERATITIDAE) (FOSSIL)
- clarkei, Dimeroceras clarkei C.L.F. von Sandberger, 1857 † - syn of: Paratornoceras lentiforme (C.L.F. von Sandberger, 1857 †) - (DIMEROCERATIDAE) (FOSSIL)
- clarkei, Dimeroceras clarkei Delepine, 1935 † - syn of: Paratornoceras polonicum (Gürich, 1896 †) - (DIMEROCERATIDAE) (FOSSIL)
- clarkei, Opalia clarkei A.A. Olsson & M. Smith, 1951 - syn of: Opalia sanjuanensis (H.N. Lowe, 1932) - (EPITONIIDAE)
- clarkei, Manticoceras clarkei Miller, 1938 † - syn of: Truyolsoceras clarkei (Miller, 1938 †) - (GEPHUROCERATIDAE) (FOSSIL)
- clarkei, Fissilunula clarkei (Moore 1870) † - (GLOSSIDAE) (FOSSIL)
- clarkei, Humboldtiella clarkei (Holzapfel, 1895 †) - (GOSSELETINIDAE) (FOSSIL)
- clarkei, Retispira clarkei Dickins, 1963 † - (KNIGHTITIDAE) (FOSSIL)
- clarkei, Prelametila clarkei (J.A. Allen & A. Sanders, 1973) - (LAMETILIDAE)
- clarkei, Loligo clarkei Neige, Lapierre & D. Merle, 2016 † - (LOLIGINIDAE) (FOSSIL)
- clarkei, Artimetalegoceras clarkei Miller, 1936 † - (METALEGOCERATIDAE) (FOSSIL)
- clarkei, Pseudomphalotrochus clarkei (de Koninck, 1876 †) - (OMPHALOTROCHIDAE) (FOSSIL)
- clarkei, Wedekindella clarkei (Holzapfel, 1895 †) - (PARODOCERATIDAE) (FOSSIL)
- clarkei, Partula clarkei Gerlach, 2016 - (PARTULIDAE)
- clarkei, Phaseolus clarkei J.A. Allen & A. Sanders, 1973 - syn of: Prelametila clarkei (J.A. Allen & A. Sanders, 1973) - (PHASEOLIDAE)
- clarkei, Platyclymenia clarkei Schindewolf, 1923 † - syn of: Platyclymenia annulata (G.G. Münster, 1832 †) - (PLATYCLYMENIIDAE) (FOSSIL)
- clarkei, Newmarracarroceras clarkei (Crick, 1894 †) - (SONNINIIDAE) (FOSSIL)
- clarkei, Sporadoceras clarkei Wedekind, 1908 † - (SPORADOCERATIDAE) (FOSSIL)
- clarkei, Tarphyceras clarkei Ruedemann, 1906 † - (TARPHYCERATIDAE) (FOSSIL)
- clarkei, Hastula clarkei E.A. Smith, 1912 - syn of: Hastula solida (G.P. Deshayes, 1857) - (TEREBRIDAE)
- clarkei, Paratibetites clarkei Mansuy, 1912 † - (TIBETITIDAE) (FOSSIL)
- clarkei, Truyolsoceras clarkei (Miller, 1938 †) - (TORNOCERATIDAE) (FOSSIL)
- clarkei, Tornoceras clarkei Holzapfel, 1895 † - syn of: Wedekindella clarkei (Holzapfel, 1895 †) - (TORNOCERATIDAE) (FOSSIL)
- clarkei, Micromphalus clarkei de Koninck, 1876 † - syn of: Pseudomphalotrochus clarkei (de Koninck, 1876 †) - (TYCHOBRAHEIDAE) (FOSSIL)
- clarkei, Fusivoluta clarkei H.A. Rehder, 1969 - (VOLUTIDAE)
- clarkei, Yoldiella clarkei J. Knudsen, 1970 - (YOLDIIDAE)
- Clarkeiteuthis, Genus Clarkeiteuthis Fuchs, Donovan & Keupp, 2013 † (PHRAGMOTEUTHIDIDAE) (FOSSIL)
- clarkensis, Bathytormus clarkensis † - (CRASSATELLIDAE) (FOSSIL)
- clarkensis, Thais clarkensis T.H. Aldrich, 1911 † - (MURICIDAE) (FOSSIL)
- clarkensis, Sigaticus clarkensis T.H. Aldrich, 1911 † - (NATICIDAE) (FOSSIL)
- clarkensis, Briansmithia clarkensis J. Stanisic, 2010 - (RHYTIDIDAE)
- Clarkeoceras, Genus Clarkeoceras Wedekind, 1918 † (ELLESMEROCERATIDAE) (FOSSIL)
- Clarkesvillia, Genus Clarkesvillia Flower, 1946 † (WESTONOCERATIDAE) (FOSSIL)
- clarki, Amnicola clarki H.A. Pilsbry, 1917 - syn of: Amnicola clarkei H.A. Pilsbry, 1917 - (AMNICOLIDAE)
- clarki, Pachycrommium clarki (C.C. Stewart, 1927 †) - (AMPULLINIDAE) (FOSSIL)
- clarki, Bellerophon clarki A.H. Clarke & Swartz, 1913 † - (BELLEROPHONTIDAE) (FOSSIL)
- clarki, Retimohnia clarki (W.H. Dall, 1907) - (BUCCINIDAE)
- clarki, Bathybuccinum clarki Y.I. Kantor & M.G. Harasewych, 1998 - (BUCCINIDAE)
- clarki, Neptunea communis clarki (F.B. Meek, 1923) - (BUCCINIDAE)
- clarki, Perplicaria clarki Smith, 1947 - (CANCELLARIIDAE)
- clarki, Venericardia clarki C.S. Weaver & K.V.W. Palmer † - (CARDITIDAE) (FOSSIL)
- clarki, Pseudoaluco clarki K.V.W. Palmer, 1953 † - (CERITHIIDAE) (FOSSIL)
- clarki, Conus clarki H.A. Rehder & Abbott, 1951 - syn of: Conasprella armiger (J.C.H. Crosse, 1858) - (CONIDAE)
- clarki, Megalocypraea clarki W.M. Ingram, 1940 † - (CYPRAEIDAE) (FOSSIL)
- clarki, Anguispira clarki E.G. Vanatta, 1924 - (DISCIDAE)
- clarki, Elasmonema clarki (Nettelroth, 1889 †) - (ELASMONEMATIDAE) (FOSSIL)
- clarki, Callonema clarki Nettelroth, 1889 † - syn of: Elasmonema clarki (Nettelroth, 1889 †) - (ELASMONEMATIDAE) (FOSSIL)
- clarki, Melampus clarki J.P.E. Morrison, 1951 - syn of: Melampus morrisoni A.M. de F. Martins, 1996 - (ELLOBIIDAE)
- clarki, Cyclendoceras clarki Flower, 1958 † - (ENDOCERATIDAE) (FOSSIL)
- clarki, Epitonium clarki I.M. Oldroyd, 1921 - syn of: Epitonium multicostatum (G.B. II Sowerby, 1844) - (EPITONIIDAE)
- clarki, Opalia clarki A.A. Olsson & M. Smith, 1951 - syn of: Opalia sanjuanensis (H.N. Lowe, 1932) - (EPITONIIDAE)
- clarki, Tucetona clarki D. Nicol, 1951 - syn of: Tucetona planata (G. Nevill & H. Nevill, 1874) - (GLYCYMERIDIDAE)
- clarki, Exogyra clarki Shattuck, 1903 † - (GRYPHAEIDAE) (FOSSIL)
- clarki, Hercoglossa clarki Miller, 1935 † - syn of: Hercoglossa diderrichi Vincent, 1913 † - (HERCOGLOSSIDAE) (FOSSIL)
- clarki, Leptochiton clarki J.D. Sigwart & B.I. Sirenko, 2012 - (LEPTOCHITONIDAE)
- clarki, Typhisala clarki (A.M. Keen & G.B. Campbell, 1964) - (MURICIDAE)
- clarki, Scabrotrophon clarki J.H. McLean, 1996 - (MURICIDAE)
- clarki, Phos crassus clarki (M. Smith, 1944) - (NASSARIIDAE)
- clarki, Natica clarki Etherington, 1931 † - (NATICIDAE) (FOSSIL)
- clarki, Olivella clarki W.P. Woodring, 1928 † - (OLIVELLIDAE) (FOSSIL)
- clarki, Hecetastoma clarki (Rohr & al., 1981 †) - (ORIOSTOMATIDAE) (FOSSIL)
- clarki, Elysia clarki R.C. Pierce, J. Curtis, Massey, S. Bass, J. Karl & Finney, 2006 - (PLAKOBRANCHIDAE)
- clarki, Patera clarki H.C. Lea, 1858 - (POLYGYRIDAE)
- clarki, Redpathoceras clarki (Flower, 1943 †) - (PROBILLINGSITIDAE) (FOSSIL)
- clarki, Wainuia clarki (A.W.B. Powell, 1936) - (RHYTIDIDAE)
- clarki, Ringiculella clarki Gardner, 1916 † - (RINGICULIDAE) (FOSSIL)
- clarki, Tagelus clarki Loel & Corey, 1932 † - (SOLECURTIDAE) (FOSSIL)
- clarki, Pelicaria clarki (Neef, 1970) - (STRUTHIOLARIIDAE)
- clarki, Apolymetis clarki J.W. Durham, 1950 - syn of: Leporimetis cognata (H.A. Pilsbry & E.G. Vanatta, 1902) - (TELLINIDAE)
- clarki, Apolymetis clarki J.W. Durham, 1950 - syn of: Leporimetis cognata (H.A. Pilsbry & E.G. Vanatta, 1902) - (TELLINIDAE)
- clarki, Mesalia clarki R.E. Dickerson, 1914 † - (TURRITELLIDAE) (FOSSIL)
- clarki, Onchidiopsis clarki D.W. Behrens, E. Ornelas & Á. Valdés, 2014 - (VELUTINIDAE)
- clarki, Lamelliconcha clarki R.E. Dickerson, 1917 † - (VENERIDAE) (FOSSIL)
- clarki nantahala, Patera clarki nantahala W.J. Clench, 1933 - (POLYGYRIDAE)
- clarkiae, Epilepton clarkiae (W. Clark, 1852) - (MONTACUTIDAE)
- clarkianus, Unio clarkianus I. Lea, 1852 - syn of: Hamiota altilis (T.A. Conrad, 1834) - (UNIONIDAE)
- clarkii, Caecum clarkii P.P. Carpenter, 1859 - (CAECIDAE)
- clarkii, Dizoniopsis clarkii (E. Forbes & S.C.T. Hanley, 1851) - (CERITHIOPSIDAE)
- Clarkoceras, Genus Clarkoceras Ruedemann, 1905 † (ELLESMEROCERATIDAE) (FOSSIL)
- clarksoni, Umbilia armeniaca clarksoni F.Jr. Lorenz & M. Beals, 2013 - (CYPRAEIDAE)
- clarksoni, Gaspocyrtoceras clarksoni Holland, 2000 † - (PARAPHRAGMITIDAE) (FOSSIL)
- clarksoni, Spondylus clarksoni K.L. Lamprell, 1992 - (SPONDYLIDAE)
- clarksonii, Notovoluta kreuslerae clarksonii (G.F. Angas, 1865) - (VOLUTIDAE)
- clarksvillense, Pleurorthoceras clarksvillense (Foerste, 1924 †) - (GEISONOCERATIDAE) (FOSSIL)
- clarksvillensis, Panamurex clarksvillensis (W.C. Mansfield, 1937 †) - (MURICIDAE) (FOSSIL)
- clarksvillensis, Rissoina clarksvillensis W.C. Mansfield, 1930 † - (RISSOINIDAE) (FOSSIL)
- claroi, Dentimargo claroi J. Espinosa & J.A. Ortea, 2004 - (MARGINELLIDAE)
- claromphalus, Epiphragmophora claromphalus L. Deville & L.H. Hupé, 1850 - syn of: Epiphragmophora clausomphalos (L. Deville & L.H. Hupé, 1850) - (EPIPHRAGMOPHORIDAE)
- claror, Herviella claror R.F. Burn, 1963 - (GLAUCIDAE)
- clarquei, Turbonilla clarquei A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- clarum, Caecum clarum É. Lamy, 1910 - (CAECIDAE)
- clarus, Drymaeus clarus L. Pfeiffer, 1857 - (BULIMULIDAE)
- clarus, Austroconus clarus (E.A. Smith, 1881) - (CONIDAE)
- clarus, Nassarius clarus (F.P. Marrat, 1877) - (NASSARIIDAE)
- clarus, Oxychilus clarus F. Held, 1837 - (OXYCHILIDAE)
- classarius, Conus classarius C.H. Hwass, 1792 - syn of: Rhizoconus capitaneus (C. Linnaeus, 1758) - (CONIDAE)
- classiarius, Amphidromus atricallosus classiarius C. Sutcharit & S. Panha, 2006 - (CAMAENIDAE)
- classiarius, Conus classiarius C.H. Hwass, 1792 - syn of: Rhizoconus capitaneus (C. Linnaeus, 1758) - (CONIDAE)
- classicarius, Turbo classicarius J.E. Gray, 1850 - syn of: Turbo sarmaticus C. Linnaeus, 1758 - (TURBINIDAE)
- Clastoteuthis, Genus Clastoteuthis Lang , 1928 † (PASSALOTEUTHIDIDAE) (FOSSIL)
- clathra, Clathurella clathra (R.P. Lesson, 1842) - (CLATHURELLIDAE)
- clathra, Columbella clathra R.P. Lesson, 1842 - syn of: Muricodrupa fenestrata (H.M.D. de Blainville, 1832) - (COLUMBELLIDAE)
- clathra, Bigalea clathra (A.V.M.D. D'Orbigny, 1850 †) - (PSEUDOBIGALEAIDAE) (FOSSIL)
- Clathranachis, Genus Clathranachis J.T. Kuroda & T. Habe, 1952 ? (COLUMBELLIDAE)
- clathrata, Acteon clathrata R.A. Philippi, 1836 - syn of: Euparthenia humboldti (A. Risso, 1826) - (ACTEONIDAE)
- clathrata, Clathrella clathrata (R.A. Philippi, 1844) - (AMATHINIDAE)
- clathrata, Acar clathrata (J.L.M. Defrance, 1816) - (ARCIDAE)
- clathrata, Scapharca clathrata L.A. Reeve, 1844 - syn of: Anadara craticulata (P. Nyst, 1848) - (ARCIDAE)
- clathrata, Arca clathrata L.A. Reeve, 1844 - syn of: Anadara craticulata (P. Nyst, 1848) - (ARCIDAE)
- clathrata, Quadrasiella clathrata O.F. von Möllendorff, 1894 - (ASSIMINEIDAE)
- clathrata, Gabbia clathrata W.F. Ponder, 2003 - (BITHYNIIDAE)
- clathrata, Pisania clathrata P. Dautzenberg & H. Fischer, 1906 - (BUCCINIDAE)
- clathrata, Bulla clathrata J.L.M. Defrance, 1817 † - (BULLIDAE) (FOSSIL)
- clathrata, Putzeysia clathrata A. Aradas, 1847 - syn of: Putzeysia wiseri (P. Calcara, 1842) - (CALLIOTROPIDAE)
- clathrata, Narona clathrata A. Adams, 1855 - syn of: Cancellaria jayana A.M. Keen, 1958 - (CANCELLARIIDAE)
- clathrata, Cerion clathrata (G. Humphrey, 1797) - (CERIONIDAE)
- clathrata, Chilodonta clathrata Etallon, 1862 † - (CHILODONTIDAE) (FOSSIL)
- clathrata, Chilodonta clathrata Étallon, 1862 † - (CHILODONTIDAE) (FOSSIL)
- clathrata, Nannodiella clathrata L.A. Reeve, 1846 - syn of: Nannodiella candidula (L.A. Reeve, 1846) - (CLATHURELLIDAE)
- clathrata, Alopia bielzii clathrata (E.A. Bielz, 1856) - (CLAUSILIIDAE)
- clathrata, Tryonia clathrata W. Stimpson, 1865 - (COCHLIOPIDAE)
- clathrata, Colubraria clathrata (G.B. I Sowerby, 1833) - (COLUBRARIIDAE)
- clathrata, Retizafra clathrata J.W. Brazier, 1877 - syn of: Retizafra intricata (C. Hedley, 1912) - (COLUMBELLIDAE)
- clathrata, Conradia clathrata (A. Adams, 1860) - (CROSSEOLIDAE)
- clathrata, Soyomya clathrata (J. Poutiers & F.R. Bernard, 1995) - (CUSPIDARIIDAE)
- clathrata, Cyclochlamys clathrata (E.C. Von Martens, 1881) - (CYCLOCHLAMYDIDAE)
- clathrata, Cylichna clathrata (J.L.M. Defrance, 1817 †) - (CYLICHNIDAE) (FOSSIL)
- clathrata, Epitonium clathrata J.G. Jeffreys, 1884 - syn of: Epitonium dallianum (A.E. Verrill & S. Smith in A.E. Verrill, 1880) - (EPITONIIDAE)
- clathrata, Peristernia clathrata (A. Valenciennes, 1840) - (FASCIOLARIIDAE)
- clathrata, Diodora clathrata (L.A. Reeve, 1849) - (FISSURELLIDAE)
- clathrata, Emarginula clathrata A. Adams & L.A. Reeve, 1850 - syn of: Montfortista panhi (J.R.C. Quoy, 1834) - (FISSURELLIDAE)
- clathrata, Emarginula clathrata W.H. Pease, 1863 - syn of: Emarginula dilecta A. Adams, 1852 - (FISSURELLIDAE)
- clathrata, Haliotis clathrata L.A. Reeve, 1846 - (HALIOTIDAE)
- clathrata, Haliotis clathrata A.A.H. Lichtenstein, 1794 - syn of: Haliotis elegans F.C.L. Koch in R.A. Philippi, 1844 - (HALIOTIDAE)
- clathrata, Babinicardia clathrata (d'Archiac & de Verneuil, 1842 †) - (HIPPOCARDIIDAE) (FOSSIL)
- clathrata, Pyrgula clathrata A. Adams, 1853 - syn of: Iravadia ornata H.F. Blanford, 1867 - (HYDROBIIDAE)
- clathrata, Lepidozona clathrata (L.A. Reeve, 1847) - (ISCHNOCHITONIDAE)
- clathrata, Limacina clathrata J.F.T. Eydoux & L.F.A. Souleyet, 1840 - syn of: Peracle reticulata (A.V.M.D. D'Orbigny, 1834) - (LIMACINIDAE)
- clathrata, Lima clathrata Y. Fang, 1987 † - (LIMIDAE) (FOSSIL)
- clathrata, Littorina clathrata G.P. Deshayes, 1855 † - syn of: Microschiza clathrata (G.P. Deshayes, 1855 †) - (LITTORINIDAE) (FOSSIL)
- clathrata, Propebela rugulata clathrata (G.O. Sars, 1878) - (MANGELIIDAE)
- clathrata, Tricarilda clathrata Terquem & Joudry, 1871 † - syn of: Tricarilda striatissima J. Gründel, 1999 † - (MATHILDIDAE) (FOSSIL)
- clathrata, Mitra clathrata L.A. Reeve, 1844 - syn of: Vexillum clathratum (L.A. Reeve, 1844) - (MITRIDAE)
- clathrata, Drupa clathrata (J.B.P.A. Lamarck, 1816) - (MURICIDAE)
- clathrata, Coralliophila clathrata (A. Adams, 1854) - (MURICIDAE)
- clathrata, Purpura clathrata H.M.D. de Blainville, 1832 - syn of: Nucella squamosa (J.B.P.A. Lamarck, 1816) - (MURICIDAE)
- clathrata, Ocenebra clathrata W.H. Dall, 1919 - syn of: Ocinebrina interfossa (P.P. Carpenter, 1864) - (MURICIDAE)
- clathrata, Purpura clathrata H.C. Küster, 1859 - syn of: Nucella squamosa (J.B.P.A. Lamarck, 1816) - (MURICIDAE)
- clathrata, Boreotrophon clathrata (A. Adams, 1854) - syn of: Coralliophila clathrata (A. Adams, 1854) - (MURICIDAE)
- clathrata, Nassa clathrata J.B.P.A. Lamarck, 1816 - syn of: Nassarius conoidalis (G.P. Deshayes, 1832) - (NASSARIIDAE)
- clathrata, Distorsio clathrata (J.B.P.A. Lamarck, 1816) - (PERSONIDAE)
- clathrata, Pisanianura clathrata P. Dautzenberg, 1906 - syn of: Pisanianura grimaldii (P. Dautzenberg, 1899) - (PISANIANURIDAE)
- clathrata, Goniobasis perstriata clathrata I. Lea - (PLEUROCERIDAE)
- clathrata, Vitrea clathrata M. von Kimakowicz, 1890 - syn of: Vitrea subrimata (O.W.H. Reinhardt, 1871) - (PRISTILOMATIDAE)
- clathrata, Provanna clathrata T. Sasaki, Ogura, H. Watanabe & K. Fujikura, 2016 - (PROVANNIDAE)
- clathrata, Microschiza clathrata (G.P. Deshayes, 1855 †) - (PSEUDOMELANIIDAE) (FOSSIL)
- clathrata, Parthenina clathrata (J.G. Jeffreys, 1848) - (PYRAMIDELLIDAE)
- clathrata, Odostomia clathrata J.G. Jeffreys, 1848 - syn of: Parthenina clathrata (J.G. Jeffreys, 1848) - (PYRAMIDELLIDAE)
- clathrata, Kleinella clathrata R.A. Philippi, 1836 - syn of: Euparthenia humboldti (A. Risso, 1826) - (PYRAMIDELLIDAE)
- clathrata, Charonia clathrata J.B.P.A. Lamarck, 1816 - syn of: Distorsio clathrata (J.B.P.A. Lamarck, 1816) - (RANELLIDAE)
- clathrata, Austrodaphnella clathrata C.F. Laseron, 1954 - (RAPHITOMIDAE)
- clathrata, Daphnella clathrata W.M. Gabb, 1865 - (RAPHITOMIDAE)
- clathrata, Alvania clathrata R.A. Philippi, 1844 - syn of: Alvania hispidula (T.A. de M. Monterosato, 1884) - (RISSOIDAE)
- clathrata, Phosinella clathrata Adams, 1853 - (RISSOINIDAE)
- clathrata, Scissurella clathrata H. Strebel, 1908 - (SCISSURELLIDAE)
- clathrata, Montrouzieria clathrata S.M. Souverbie, 1863 - (SEMELIDAE)
- clathrata, Tylospira clathrata (R. Tate, 1885 †) - (STRUTHIOLARIIDAE) (FOSSIL)
- clathrata, Pelicaria clathrata R. Tate, 1885 † - syn of: Tylospira clathrata (R. Tate, 1885 †) - (STRUTHIOLARIIDAE) (FOSSIL)
- clathrata, Tellina clathrata (G.P. Deshayes, 1835) - (TELLINIDAE)
- clathrata, Macoma clathrata G.P. Deshayes, 1835 - syn of: Tellina clathrata (G.P. Deshayes, 1835) - (TELLINIDAE)
- clathrata, Loxoglypta clathrata G.P. Deshayes, 1835 - syn of: Tellina clathrata (G.P. Deshayes, 1835) - (TELLINIDAE)
- clathrata, Euthymella clathrata (A.A. Gould, 1861) - (TRIPHORIDAE)
- clathrata, Monodonta clathrata A. Adams, 1853 - syn of: Vaceuchelus clathratus (A. Adams, 1853) - (TROCHIDAE)
- clathrata, Turbinella clathrata A. Valenciennes, 1841 - syn of: Peristernia clathrata (A. Valenciennes, 1840) - (TURBINELLIDAE)
- clathrata, Turritella clathrata L.C. Kiener, 1843 - syn of: Gazameda iredalei Finlay, 1927 - (TURRITELLIDAE)
- clathrata, Gazameda clathrata L.C. Kiener & P. Fischer, 1873 - syn of: Gazameda iredalei Finlay, 1927 - (TURRITELLIDAE)
- clathrata, Vanikoro clathrata (C.A. Récluz, 1845) - (VANIKORIDAE)
- clathrata, Venus clathrata P.F. Röding, 1798 - syn of: Chione dysera (C. Linnaeus, 1758) - (VENERIDAE)
- clathrata, Periglypta clathrata G.P. Deshayes, 1854 - syn of: Periglypta albocancellata (M. Huber, 2010) - (VENERIDAE)
- clathrata, Venus clathrata G.P. Deshayes, 1853 - syn of: Periglypta albocancellata (M. Huber, 2010) - (VENERIDAE)
- clathrata, Antigona clathrata G.P. Deshayes, 1853 - syn of: Periglypta albocancellata (M. Huber, 2010) - (VENERIDAE)
- clathrata, Lyropupa clathrata C.M.F. Ancey, 1904 - syn of: Lyropupa clathratula C.M.F. Ancey, 1904 - (VERTIGINIDAE)
- clathrata burnesi, Acar clathrata burnesi Archiac, 1860 † - syn of: Anadara biformis K. Martin, 1883 † - (ARCIDAE) (FOSSIL)
- clathrata miticula, Drupa clathrata miticula J.B.P.A. Lamarck, 1822 - (MURICIDAE)
- clathrata multicostata, Babinicardia clathrata multicostata (Beushausen, 1895 †) - (HIPPOCARDIIDAE) (FOSSIL)
- clathrata nassoviensis, Babinicardia clathrata nassoviensis (Beushausen, 1895 †) - (HIPPOCARDIIDAE) (FOSSIL)
- clathrata ridens, Distorsio clathrata ridens (L.A. Reeve, 1844) - (PERSONIDAE)
- clathrata robinsoni, Distorsio clathrata robinsoni E.J. Petuch, 1987 - (PERSONIDAE)
- clathrata tomricei, Haliotis clathrata tomricei S. Patamakanthin, 2002 - (HALIOTIDAE)
- clathrata venusta, Haliotis clathrata venusta F.A. Schilder & M. Schilder, 1938 - (HALIOTIDAE)
- clathrataeformis, Emarginula clathrataeformis K.E.I. von Eichwald, 1830 † - (FISSURELLIDAE) (FOSSIL)
- clathratoannulatum, Spyroceras clathratoannulatum (F.A. Roemer, 1861 †) - (SPYROCERATIDAE) (FOSSIL)
- clathratula, Meteuthria clathratula (K.H.J. Thiele, 1925) - (BUCCINIDAE)
- clathratula, Ruthvenia clathratula (L. Pfeiffer, 1850) - (CHAROPIDAE)
- clathratula, Mathilda clathratula (J.A.H. Bosquet, 1869 †) - (MATHILDIDAE) (FOSSIL)
- clathratula, Drupa clathratula J.B.P.A. Lamarck, 1816 - syn of: Drupa clathrata (J.B.P.A. Lamarck, 1816) - (MURICIDAE)
- clathratula, Nassa clathratula A. Adams, 1852 - syn of: Phrontis alba (T. Say, 1826) - (NASSARIIDAE)
- clathratula, Patella clathratula L.A. Reeve, 1854 - syn of: Cellana ardosiaea (J.B. Hombron & C.H. Jacquinot, 1841) - (PATELLIDAE)
- clathratula, Georgia clathratula J.R. Bourguignat, 1882 - (POMATIIDAE)
- clathratula, Otopoma clathratula (C.A. Récluz, 1843) - (POMATIIDAE)
- clathratula, Hemizyga clathratula (A.T. Young & Armstrong, 1874 †) - (PSEUDOZYGOPLEURIDAE) (FOSSIL)
- clathratula, Odostomia clathratula (C.B. Adams, 1852) - (PYRAMIDELLIDAE)
- clathratula, Careliopsis clathratula (O.A.L. Mörch, 1875) - (PYRAMIDELLIDAE)
- clathratula, Alvania clathratula A. Adams, 1861 - (RISSOIDAE)
- clathratula, Pseudostomatella clathratula (A. Adams, 1854) - (TROCHIDAE)
- clathratula, Turritella clathratula Wood, 1847 † - (TURRITELLIDAE) (FOSSIL)
- clathratula, Lyropupa clathratula C.M.F. Ancey, 1904 - (VERTIGINIDAE)
- clathratula producta, Scalaria clathratula producta J.G. Jeffreys, 1884 - syn of: Epitonium dallianum (A.E. Verrill & S. Smith in A.E. Verrill, 1880) - (EPITONIIDAE)
- clathratula socotrana, Otopoma clathratula socotrana H.H. Godwin-Austen, 1881 - (POMATIIDAE)
- clathratula spinosa, Scalaria clathratula spinosa J.G. Jeffreys, 1884 - syn of: Epitonium dallianum (A.E. Verrill & S. Smith in A.E. Verrill, 1880) - (EPITONIIDAE)
- clathratuloides, Ruthvenia clathratuloides (G.P.L.K. Gude, 1897) - (CHAROPIDAE)
- clathratulum, Epitonium clathratulum Turton, 1806 - (EPITONIIDAE)
- clathratulum, Eunema clathratulum J.J.F. Whiteaves, 1892 † - syn of: Nodonema clathratulum (J.J.F. Whiteaves, 1892 †) - (LOPHOSPIRIDAE) (FOSSIL)
- clathratulum, Nodonema clathratulum (J.J.F. Whiteaves, 1892 †) - (PORTLOCKIELLIDAE) (FOSSIL)
- clathratulum minutum, Epitonium clathratulum minutum (J. de C. Sowerby, 1823 †) - (EPITONIIDAE) (FOSSIL)
- clathratulus, Turbo clathratulus F. Kanmacher, 1798 - syn of: Epitonium clathratulum Turton, 1806 - (TURBINIDAE)
- clathratum, Buccinum clathratum L.C. Kiener, 1834 - syn of: Nassarius globosus (J.R.C. Quoy & J.P. Gaimard, 1833) - (BUCCINIDAE)
- clathratum, Buccinum clathratum W. Wood, 1825 - syn of: Nassarius conoidalis (G.P. Deshayes, 1832) - (BUCCINIDAE)
- clathratum, Ctiloceras clathratum C. Hedley, 1902 - (CAECIDAE)
- clathratum, Caecum clathratum P.P. Carpenter, 1857 - (CAECIDAE)
- clathratum, Phalium clathratum J.H.F. Link, 1807 - syn of: Phalium areola (C. Linnaeus, 1758) - (CASSIDAE)
- clathratum, Catantostoma clathratum C.L.F. von Sandberger, 1842 † - (CATANTOSTOMATIDAE) (FOSSIL)
- clathratum, Cerithium clathratum A. Adams in G.B. II Sowerby, 1855 - syn of: Royella sinon (C.É. Bayle, 1880) - (CERITHIIDAE)
- clathratum, Cerithiopsis clathratum A. Adams in G.B. II Sowerby, 1855 - syn of: Royella sinon (C.É. Bayle, 1880) - (CERITHIOPSIDAE)
- clathratum, Herpetopoma clathratum A. Adams, 1853 - syn of: Vaceuchelus clathratus (A. Adams, 1853) - (CHILODONTIDAE)
- clathratum, Conocardium clathratum d'Archiac & de Verneuil, 1842 † - syn of: Babinicardia clathrata (d'Archiac & de Verneuil, 1842 †) - (CONOCARDIIDAE) (FOSSIL)
- clathratum, Vexillum clathratum (L.A. Reeve, 1844) - (COSTELLARIIDAE)
- clathratum, Costellaria clathratum L.A. Reeve, 1844 - syn of: Vexillum clathratum (L.A. Reeve, 1844) - (COSTELLARIIDAE)
- clathratum, Compressidentalium clathratum (E.C. Von Martens, 1881) - (DENTALIIDAE)
- clathratum, Sinum clathratum (J.F. Gmelin, 1790 †) - (NATICIDAE) (FOSSIL)
- clathratum, Palliolum clathratum (E.C. Von Martens, 1881) - (PECTINIDAE)
- clathratum, Rhytidopoma clathratum (A.A. Gould, 1842) - (POMATIIDAE)
- clathratum, Pirenella clathratum A. Adams in G.B. II Sowerby, 1855 - syn of: Royella sinon (C.É. Bayle, 1880) - (POTAMIDIDAE)
- clathratum, Coelocentrum clathratum E.C. Von Martens, 1897 - (UROCOPTIDAE)
- clathratum, Schwartziella clathratum K.T. Menke, 1828 - syn of: Schwartziella minima E. Rolán & L. Luque, 2000 - (ZEBINIDAE)
- clathratum artemisensis, Rhytidopoma clathratum artemisensis C. de la Torre & P. Bartsch, 1941 - (POMATIIDAE)
- clathratum candelaense, Rhytidopoma clathratum candelaense C. de la Torre & P. Bartsch, 1941 - (POMATIIDAE)
- clathratum deshayesi, Sinum clathratum deshayesi (O.G. Michelotti, 1847 †) - (NATICIDAE) (FOSSIL)
- clathratum elatior, Buccinum clathratum elatior A.T. von Middendorff, 1849 - syn of: Boreotrophon clathratus (C. Linnaeus, 1767) - (BUCCINIDAE)
- clathratum jumaguaense, Rhytidopoma clathratum jumaguaense (C. de la Torre & P. Bartsch, 1941) - (POMATIIDAE)
- clathratum jumaquense, Rhytidopoma clathratum jumaquense C. de la Torre & P. Bartsch, 1941 - syn of: Rhytidopoma clathratum jumaguaense (C. de la Torre & P. Bartsch, 1941) - (POMATIIDAE)
- clathratum levesqui, Sinum clathratum levesqui G.P. Deshayes, 1864 † - (NATICIDAE) (FOSSIL)
- clathratus, Araeonema clathratus (Paeckelmann, 1913 †) - (ARAEONEMATIDAE) (FOSSIL)
- clathratus, Buccinum clathratus C. Linnaeus, 1767 - syn of: Boreotrophon clathratus (C. Linnaeus, 1767) - (BUCCINIDAE)
- clathratus, Drymaeus clathratus L. Pfeiffer, 1858 - (BULIMULIDAE)
- clathratus, Bosnites clathratus J. Von Hauer, 1897 † - (CERATITIDA (UNASSIGNED)) (FOSSIL)
- clathratus, Vaceuchelus clathratus (A. Adams, 1853) - (CHILODONTIDAE)
- clathratus, Donax clathratus L.A. Reeve, 1855 - (DONACIDAE)
- clathratus, Epitonium clathratus E.M. Da Costa, 1779 - syn of: Epitonium clathrus (C. Linnaeus, 1758) - (EPITONIIDAE)
- clathratus, Euchondria clathratus (F. McCoy, 1844 †) - (EUCHONDRIIDAE) (FOSSIL)
- clathratus, Strombiformis clathratus E.M. Da Costa, 1779 - syn of: Epitonium clathrus (C. Linnaeus, 1758) - (EULIMIDAE)
- clathratus, Fusus clathratus L.H. Hupé, 1854 † - syn of: Aeneator cleryanus (A.V.M.D. D'Orbigny, 1842 †) - (FASCIOLARIIDAE) (FOSSIL)
- clathratus, Lepidozona clathratus L.A. Reeve, 1847 - syn of: Lepidozona clathrata (L.A. Reeve, 1847) - (ISCHNOCHITONIDAE)
- clathratus, Boreotrophon clathratus (C. Linnaeus, 1767) - (MURICIDAE)
- clathratus, Trophon clathratus J.E. Tenison-Woods, 1876 - syn of: Benthoxystus petterdi (J.W. Brazier in J.C.H. Crosse, 1870) - (MURICIDAE)
- clathratus, Nassarius clathratus (I. von Born, 1778 †) - (NASSARIIDAE) (FOSSIL)
- clathratus, Antillophos clathratus L.C. Kiener, 1840 - syn of: Peristernia clathrata (A. Valenciennes, 1840) - (NASSARIIDAE)
- clathratus, Nassarius clathratus J.B.P.A. Lamarck, 1822 - syn of: Nassarius conoidalis (G.P. Deshayes, 1832) - (NASSARIIDAE)
- clathratus, Parallelodon clathratus (F. McCoy, 1844 †) - (PARALLELODONTIDAE) (FOSSIL)
- clathratus, Camptochlamys clathratus F.A. Roemer, 1836 † - (PECTINIDAE) (FOSSIL)
- clathratus, Fossarus clathratus R.A. Philippi, 1844 - syn of: Clathrella clathrata (R.A. Philippi, 1844) - (PLANAXIDAE)
- clathratus, Gyraulus clathratus Š. Brusina, 1884 - syn of: Gyraulus okrugljakensis T.A. Neubauer & al., 2014 - (PLANORBIDAE)
- clathratus, Phrixgnathus clathratus N.W. Gardner, 1972 - (PUNCTIDAE)
- clathratus, Trochus clathratus A. Aradas, 1847 - syn of: Putzeysia wiseri (P. Calcara, 1842) - (TROCHIDAE)
- clathratus, Vermetus clathratus (G.P. Deshayes †) - (VERMETIDAE) (FOSSIL)
- clathratus, Viviparus clathratus (G.P. Deshayes in Geoffroy Saint-Hilaire & al., 1832 †) - (VIVIPARIDAE) (FOSSIL)
- clathratus attenuata, Trophon clathratus attenuata F.W. Harmer, 1918 - syn of: Boreotrophon truncatus (H. Strøm, 1768) - (MURICIDAE)
- clathratus cepula, Boreotrophon clathratus cepula (G.B. III Sowerby, 1880) - (MURICIDAE)
- clathratus doricus, Viviparus clathratus doricus Bukowski, 1892 † - (VIVIPARIDAE) (FOSSIL)
- clathratus exilis, Trophon clathratus exilis F.W. Harmer, 1918 - syn of: Boreotrophon truncatus (H. Strøm, 1768) - (MURICIDAE)
- clathratus grandis, Trophon clathratus grandis O.A.L. Mörch, 1869 - syn of: Boreotrophon clathratus (C. Linnaeus, 1767) - (MURICIDAE)
- clathratus gunneri, Boreotrophon clathratus gunneri (S.L. Lovén, 1846) - (MURICIDAE)
- clathratus intermedia, Trophon clathratus intermedia T.A. Verkrüzen, 1881 - syn of: Boreotrophon clathratus (C. Linnaeus, 1767) - (MURICIDAE)
- clathratus intermedius, Trophon clathratus intermedius T.A. Verkrüzen, 1881 - syn of: Boreotrophon clathratus (C. Linnaeus, 1767) - (MURICIDAE)
- clathratus maxima, Trophon clathratus maxima T.A. Verkrüzen, 1881 - syn of: Boreotrophon clathratus (C. Linnaeus, 1767) - (MURICIDAE)
- clathratus maximus, Trophon clathratus maximus T.A. Verkrüzen, 1881 - syn of: Boreotrophon clathratus (C. Linnaeus, 1767) - (MURICIDAE)
- clathratus normalis, Buccinum clathratus normalis A.T. von Middendorff, 1849 - syn of: Boreotrophon clathratus (C. Linnaeus, 1767) - (BUCCINIDAE)
- clathratus scalariformis, Boreotrophon clathratus scalariformis A.A. Gould, 1840 - syn of: Boreotrophon clathratus (C. Linnaeus, 1767) - (MURICIDAE)
- clathratus ventricosa, Buccinum clathratus ventricosa A.T. von Middendorff, 1849 - syn of: Boreotrophon clathratus (C. Linnaeus, 1767) - (BUCCINIDAE)
- Clathrella, Genus Clathrella C.A. Récluz, 1864 (AMATHINIDAE)
- clathrella, Alvania clathrella (L. Seguenza, 1903) - (RISSOIDAE)
- clathroannulatum, Gorbyoceras clathroannulatum (F.A. Roemer, 1861 †) - (PROTEOCERATIDAE) (FOSSIL)
- Clathrobaculus, syn of: Genus Promathildia Andreae, 1887 † (GORDENELLIDAE) (FOSSIL)
- Clathrobaculus, Genus Clathrobaculus A.E.M. Cossmann, 1912 † (MATHILDIDAE) (FOSSIL)
- Clathrocaspia, Subgenus Caspia (Clathrocaspia) W.A. Lindholm, 1929 (HYDROBIIDAE)
- Clathroceras, Genus Clathroceras Foerste, 1926 † (TRIMEROCERATIDAE) (FOSSIL)
- Clathroconcha, syn of: Genus Ctena O.A.L. Mörch, 1860 (LUCINIDAE)
- clathrodon, Mactra clathrodon Lea, 1833 † - (MACTRIDAE) (FOSSIL)
- Clathrodon, syn of: Genus Rangia C. des Moulins, 1828 (MACTRIDAE)
- Clathrodrillia, Genus Clathrodrillia W.H. Dall, 1918 (DRILLIIDAE)
- Clathrofenella, Genus Clathrofenella J.T. Kuroda & T. Habe, 1952 (SCALIOLIDAE)
- Clathrolucina, Genus Clathrolucina J.D. Taylor & E.A. Glover, 2013 (LUCINIDAE)
- Clathromangelia, Genus Clathromangelia T.A. de M. Monterosato, 1884 (CLATHURELLIDAE)
- Clathromangilia, syn of: Genus Clathromangelia T.A. de M. Monterosato, 1884 (CLATHURELLIDAE)
- Clathronema, Genus Clathronema Blodgett, 1992 † (LOXONEMATIDAE) (FOSSIL)
- Clathropleura, syn of: Subgenus Chiton (Rhyssoplax) K.H.J. Thiele in F.H. Troschel, 1893 (CHITONIDAE)
- Clathropleura, syn of: Subgenus Chiton (Rhyssoplax) K.H.J. Thiele in F.H. Troschel, 1893 (CHITONIDAE)
- Clathropodium, syn of: Genus Parmacella Couvier, 1804 (PARMACELLIDAE)
- Clathropsis, Genus Clathropsis C.F. Laseron, 1956 (CERITHIOPSIDAE)
- Clathrorthalicus, Subgenus Sultana (Clathrorthalicus) H. Strebel, 1909 (ORTHALICIDAE)
- Clathroscala, Genus Clathroscala De Boury, 1890 † (EPITONIIDAE) (FOSSIL)
- Clathrosepta, Genus Clathrosepta J.H. McLean & D.L. Geiger, 1998 (FISSURELLIDAE)
- Clathrospira, Genus Clathrospira Ulrich & Scofield, 1897 † (EOTOMARIIDAE) (FOSSIL)
- Clathrotellina, Subgenus Tellina (Clathrotellina) K.H.J. Thiele, 1934 (TELLINIDAE)
- Clathroterebra, Genus Clathroterebra K. Oyama, 1961 (TEREBRIDAE)
- clathrum mediterraneum, Epitonium clathrum mediterraneum W. Kobelt, 1887 - syn of: Epitonium clathrus (C. Linnaeus, 1758) - (EPITONIIDAE)
- clathrum minimum, Epitonium clathrum minimum F. Nordsieck, 1968 - syn of: Epitonium clathrus (C. Linnaeus, 1758) - (EPITONIIDAE)
- clathrus, Epitonium clathrus (C. Linnaeus, 1758) - (EPITONIIDAE)
- clathrus, Epitonium clathrus G.B. Sowerby, 1842 - syn of: Gyroscala lamellosa (J.B.P.A. Lamarck, 1822) - (EPITONIIDAE)
- clathrus, Epitonium clathrus T. Say, 1831 - syn of: Epitonium angulatum T. Say, 1831 - (EPITONIIDAE)
- Clathrus, syn of: Genus Epitonium P.F. Röding, 1798 (EPITONIIDAE)
- clathrus, Neocancilla clathrus (J.F. Gmelin, 1791) - (MITRIDAE)
- clathrus, Truncatella clathrus R.T. Lowe, 1832 - (TRUNCATELLIDAE)
- clathrus, Turbo clathrus C. Linnaeus, 1758 - syn of: Epitonium clathrus (C. Linnaeus, 1758) - (TURBINIDAE)
- clathrus angulata, Epitonium clathrus angulata T. Say, 1831 - syn of: Epitonium angulatum T. Say, 1831 - (EPITONIIDAE)
- clathrus annulatus, Epitonium clathrus annulatus K.O. Milaschewitsch, 1909 - (EPITONIIDAE)
- clathrus crenifera, Neocancilla clathrus crenifera (J.B.P.A. Lamarck, 1811) - (MITRIDAE)
- clathrus emersoni, Neocancilla clathrus emersoni (H.A. Pilsbry, 1921) - (MITRIDAE)
- clathrus groenlandicus, Epitonium clathrus groenlandicus J.H. Chemnitz, 1795 - syn of: Boreoscala greenlandica (G. Perry, 1811) - (EPITONIIDAE)
- clathrus groenlandicus, Turbo clathrus groenlandicus J.H. Chemnitz, 1795 - syn of: Boreoscala greenlandica (G. Perry, 1811) - (TURBINIDAE)
- clathrus maculosa, Neocancilla clathrus maculosa J.F. Gmelin, 1791 - syn of: Neocancilla maculosa (J.F. Gmelin, 1791) - (MITRIDAE)
- Clathurella, Genus Clathurella P.P. Carpenter, 1857 (CLATHURELLIDAE)
- clathurellaeformis, Pleurotomella clathurellaeformis M.M. Schepman, 1913 - (RAPHITOMIDAE)
- CLATHURELLIDAE Adams & Adams, 1858 - Family (GASTROPODA-CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-CONOIDEA [Superfamily])
- clathurelloides, Kermia clathurelloides R.N. Kilburn, 2009 - (RAPHITOMIDAE)
- Clathurina, Genus Clathurina J.C. Melvill, 1917 (RAPHITOMIDAE)
- clatior, Zemacies clatior Finlay, 1926 † - (BORSONIIDAE) (FOSSIL)
- clatrata, Itia clatrata J. Marwick, 1931 † - (MITROMORPHIDAE) (FOSSIL)
- clatratum, Morum clatratum P. Bouchet, 2002 - (HARPIDAE)
- clatrellata, Taita clatrellata (J. Marwick, 1931 †) - (SCAPHANDRIDAE) (FOSSIL)
- Clatripoma, Genus Clatripoma E. Neubert, 2009 (POMATIIDAE)
- Clatrofenella, Genus Clatrofenella Kuroda & Habe, 1952 † (SCALIOLIDAE) (FOSSIL)
- clatrorum, Pyrgulina clatrorum Peñas & Rolán, 2017 - (PYRAMIDELLIDAE)
- Clatrosansonia, Genus Clatrosansonia B. Sabelli & M. Taviani, 2003 (PICKWORTHIIDAE)
- Claucostracia, syn of: Genus Chlorostracia J.F. Mabille, 1889 (PALUDOMIDAE)
- Claudena, syn of: Genus Claudettea T. Iredale, 1941 (CAMAENIDAE)
- claudens, Opisthosiphon claudens C. de la Torre & P. Bartsch, 1941 - (POMATIIDAE)
- claudens, Macroceramus claudens J. Gundlach in L. Pfeiffer, 1859 - (UROCOPTIDAE)
- claudens baitiquiriensis, Macroceramus claudens baitiquiriensis C. de la Torre & P. Bartsch, 2008 - (UROCOPTIDAE)
- Claudeonychia, Genus Claudeonychia Pojeta, Jr., 1997 † (AMBONYCHIIDAE) (FOSSIL)
- Claudettea, Genus Claudettea T. Iredale, 1941 (CAMAENIDAE)
- claudia, Mastus claudia W.J.M. Maassen & F.W. Welter-Schultes, 1998 - (ENIDAE)
- claudia, Xerocrassa claudia B. Hausdorf & F.W. Welter-Schultes, 1998 - (HYGROMIIDAE)
- claudia, Candidula claudia C.F. Sacchi, 1954 - syn of: Candidula cavannae M. Paulucci, 1881 - (HYGROMIIDAE)
- claudia, Rothifruticicola nicosiana claudia R.A. Bank & F.W. Welter-Schultes, 1998 - (HYGROMIIDAE)
- claudia, Bathyangulus claudia (J.C. Melvill & R. Standen, 1907) - (TELLINIDAE)
- claudiae, Africonus claudiae (M.J. Tenorio & C.M.L. Afonso, 2004) - (CONIDAE)
- claudiae, Sigatica claudiae E. Robba, Pedriali & E. Quaggiotto, 2016 † - (NATICIDAE) (FOSSIL)
- claudiae, Darwinices claudiae Griffin & G. Pastorino, 2013 † - (NATICIDAE) (FOSSIL)
- claudicans, Chondrothyrella claudicans (F. Poey, 1851) - (POMATIIDAE)
- claudicans culminis, Chondrothyrella claudicans culminis C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- Claudiconcha, Subgenus Petricola (Claudiconcha) P. Fischer, 1887 (VENERIDAE)
- claudiconus, Xerocrassa claudiconus B. Hausdorf & F.W. Welter-Schultes, 1998 - (HYGROMIIDAE)
- claudiensis, Helix claudiensis W. Kobelt, 1906 - syn of: Helix pomatia C. Linnaeus, 1758 - (HELICIDAE)
- claudinae, Xerocrassa claudinae L. Gasull, 1963 - syn of: Amandana moraguesi (W. Kobelt, 1883) - (HYGROMIIDAE)
- Claudioconcha, syn of: Subgenus Petricola (Claudiconcha) P. Fischer, 1887 (VENERIDAE)
- claudioi, Alvania claudioi G. Buzzurro & F. Landini, 2007 - (RISSOIDAE)
- claudoni, Glyphostoma claudoni (P. Dautzenberg, 1900) - (CLATHURELLIDAE)
- claudoni, Numaegilina claudoni (P. Dautzenberg & H. Fischer, 1906) - (PYRAMIDELLIDAE)
- claurina, Doris claurina (Er. Marcus, 1959) - (DORIDIDAE)
- claurina, Doris claurina Er. Marcus, 1959 - syn of: Doris claurina (Er. Marcus, 1959) - (DORIDIDAE)
- clausa, Bulla clausa W.H. Dall, 1889 - (BULLIDAE)
- clausa, Liotipoma clausa J.H. McLean, 2012 - (COLLONIIDAE)
- clausa, Arinia clausa J.J. Vermeulen, 1996 - (DIPLOMMATINIDAE)
- clausa, Laemodonta clausa H. Adams & A. Adams, 1853 - (ELLOBIIDAE)
- clausa, Hemitoma clausa D'Orbigny, 1842 - syn of: Hemitoma octoradiata (J.F. Gmelin, 1791) - (FISSURELLIDAE)
- clausa, Rocellaria clausa Bohm, 1926 † - (GASTROCHAENIDAE) (FOSSIL)
- clausa, Euryzone clausa (J.W. Hall, 1879 †) - (GOSSELETINIDAE) (FOSSIL)
- clausa, Panopea clausa R.O. Wilckens, 1910 † - (HIATELLIDAE) (FOSSIL)
- clausa, Limea clausa F. Danilo & G.B. Sandri, 1856 - syn of: Limaria loscombi (G.B. I Sowerby, 1823) - (LIMIDAE)
- clausa, Natica clausa W.J. Broderip & G.B. I Sowerby, 1829 - syn of: Cryptonatica affinis (J.F. Gmelin, 1791) - (NATICIDAE)
- clausa, Natica clausa W.J. Broderip & Sowerby, 1829 - syn of: Cryptonatica affinis (J.F. Gmelin, 1791) - (NATICIDAE)
- clausa, Patella clausa D'Orbigny, 1847 - syn of: Scutellastra chapmani (J.E. Tenison-Woods, 1875) - (PATELLIDAE)
- clausa, Talona clausa S.C.T. Hanley, 1842 - syn of: Talona explanata (L. Spengler, 1792) - (PHOLADIDAE)
- clausa, Elimia clausa I. Lea, 1861 - (PLEUROCERIDAE)
- clausa, Pleurotomaria clausa J.W. Hall, 1879 † - syn of: Euryzone clausa (J.W. Hall, 1879 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- clausa, Ligatella clausa (G.B. Sowerby, 1843;) - (POMATIIDAE)
- clausa, Kuphus clausa G.B. II Sowerby, 1875 - syn of: Kuphus polythalamia (C. Linnaeus, 1767) - (TEREDINIDAE)
- clausa depressior, Natica clausa depressior A.T. von Middendorff, 1851 - syn of: Cryptonatica affinis (J.F. Gmelin, 1791) - (NATICIDAE)
- clausa elatior, Natica clausa elatior A.T. von Middendorff, 1849 - syn of: Cryptonatica affinis (J.F. Gmelin, 1791) - (NATICIDAE)
- clausa minor, Natica clausa minor R.A. Philippi, 1852 - syn of: Cryptonatica affinis (J.F. Gmelin, 1791) - (NATICIDAE)
- clausa normalis, Natica clausa normalis A.T. von Middendorff, 1849 - syn of: Cryptonatica affinis (J.F. Gmelin, 1791) - (NATICIDAE)
- clausadeae, Callochiton clausadeae P. Kaas & R.A. Van Belle, 1985 - (CALLOCHITONIDAE)
- clausadeae clausadei, Callochiton clausadeae clausadei R.A. Van Belle, 1985 - syn of: Callochiton clausadeae P. Kaas & R.A. Van Belle, 1985 - (CALLOCHITONIDAE)
- clausadei, Callochiton clausadei P. Kaas & R.A. Van Belle, 1985 - syn of: Callochiton clausadeae P. Kaas & R.A. Van Belle, 1985 - (CALLOCHITONIDAE)
- Clausaria, syn of: Genus Kuphus J.É. Guettard, 1770 (TEREDINIDAE)
- clauseni, Neomanticoceras clauseni Yatskov, 1990 † - syn of: Neomanticoceras paradoxum (Matern, 1931 †) - (GEPHUROCERATIDAE) (FOSSIL)
- clauseni, Linguaclymenia clauseni W. Korn & J. Price, 1987 † - (KOSMOCLYMENIIDAE) (FOSSIL)
- Clauseniceras, Genus Clauseniceras Becker & House, 1993 † (GEPHUROCERATIDAE) (FOSSIL)
- clausepeakensis, Gyronema clausepeakensis Kulas & Batten, 1997 † - syn of: Cinclidonema clausepeakensis (Kulas & Batten, 1997 †) - (LOPHOSPIRIDAE) (FOSSIL)
- clausepeakensis, Cinclidonema clausepeakensis (Kulas & Batten, 1997 †) - (OMPHALOTROCHIDAE) (FOSSIL)
- clausi, Pisidium clausi A. Korniushin, 2006 - (SPHAERIIDAE)
- clausicaudata, Crassibougia clausicaudata (R.B. Hinds, 1844) - (FASCIOLARIIDAE)
- clausicaudatus, Latirus clausicaudatus R.B. Hinds, 1844 - syn of: Crassibougia clausicaudata (R.B. Hinds, 1844) - (FASCIOLARIIDAE)
- clausicaudatus, Pseudolatirus clausicaudatus R.B. Hinds, 1844 - syn of: Crassibougia clausicaudata (R.B. Hinds, 1844) - (FASCIOLARIIDAE)
- clausiformis, Tectonatica clausiformis K. Oyama, 1969 - syn of: Cryptonatica affinis (J.F. Gmelin, 1791) - (NATICIDAE)
- clausiformis, Natica clausiformis K. Oyama, 1969 - syn of: Cryptonatica affinis (J.F. Gmelin, 1791) - (NATICIDAE)
- clausiformis, Odostomia clausiformis P.P. Carpenter, 1857 - syn of: Odostomia clausiliformis P.P. Carpenter, 1857 - (PYRAMIDELLIDAE)
- clausifossata, Turris clausifossata R.N. Kilburn, A.E. Fedosov & B.M. Olivera, 2012 - (TURRIDAE)
- clausii, Murex clausii R.W. Dunker, 1879 - syn of: Triplex varius clausii (R.W. Dunker, 1879) - (MURICIDAE)
- clausii, Triplex varius clausii (R.W. Dunker, 1879) - (MURICIDAE)
- Clausilia, Genus Clausilia J.P.R. Draparnaud, 1805 (CLAUSILIIDAE)
- clausilia, Aesopus clausilia P.L. Duclos, 1846 - syn of: Aesopus clausiliformis (L.C. Kiener, 1834) - (COLUMBELLIDAE)
- clausiliaeformis, Perrieria clausiliaeformis (C.M. Tapparone-Canefri, 1874) - (COELOCIONTIDAE)
- clausiliaeformis, Coccoderma clausiliaeformis (A.R.J.B. Bavay & P. Dautzenberg, 1912) - (ENIDAE)
- clausiliaeformis, Buliminus clausiliaeformis A.R.J.B. Bavay & P. Dautzenberg, 1912 - syn of: Coccoderma clausiliaeformis (A.R.J.B. Bavay & P. Dautzenberg, 1912) - (ENIDAE)
- clausiliaeformis, Sculptiferussacia clausiliaeformis M.R. Alonso & C.M. Ibáñez, 1992 - (FERUSSACIIDAE)
- Clausiliastra, syn of: Genus Cochlodina A.E.J. Férussac, 1821 (CLAUSILIIDAE)
- clausiliforme, Buccinum clausiliforme L.C. Kiener, 1834 - syn of: Aesopus clausiliformis (L.C. Kiener, 1834) - (BUCCINIDAE)
- clausiliformis, Abida clausiliformis É.A.A. Locard, 1894 - syn of: Abida pyrenaearia A. Michaud, 1831 - (CHONDRINIDAE)
- clausiliformis, Aesopus clausiliformis (L.C. Kiener, 1834) - (COLUMBELLIDAE)
- clausiliformis, Odostomia clausiliformis P.P. Carpenter, 1857 - (PYRAMIDELLIDAE)
- CLAUSILIIDAE J. Gray, 1855 - Family (GASTROPODA-HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-CLAUSILIOIDEA [Superfamily])
- clausilioides, Abida clausilioides L. Pfeiffer, 1848 - syn of: Abida secale affinis E.A. Rossmässler, 1839 - (CHONDRINIDAE)
- clausilioides, Abida clausilioides É.A.A. Locard, 1894 - syn of: Abida pyrenaearia A. Michaud, 1831 - (CHONDRINIDAE)
- clausilioides, Temesa clausilioides (L.A. Reeve, 1849) - (CLAUSILIIDAE)
- Clausilioides, Genus Clausilioides W.A. Lindholm, 1925 (ENIDAE)
- Clausiliopsis, Subgenus Pupopsis (Clausiliopsis) O.F. von Möllendorff, 1901 (ENIDAE)
- Clausina, syn of: Genus Thyasira J.B.P.A. Lamarck, 1818 (THYASIRIDAE)
- Clausina, syn of: Genus Venus C. Linnaeus, 1758 (VENERIDAE)
- Clausinella, Genus Clausinella J.E. Gray, 1851 (VENERIDAE)
- clausium, Manticoceras sinuosum clausium House & Kirchgasser, 2008 † - (GEPHUROCERATIDAE) (FOSSIL)
- clausoinflata, Theba geminata clausoinflata (A. Mousson, 1857) - (HELICIDAE)
- clausomphalos, Epiphragmophora clausomphalos (L. Deville & L.H. Hupé, 1850) - (EPIPHRAGMOPHORIDAE)
- claussi, Bzybia claussi H. Nordsieck, 1977 - (CLAUSILIIDAE)
- claussi, Paratheba claussi B. Hausdorf, 2000 - (HYGROMIIDAE)
- claustralis, Eutheba claustralis (K.T. Menke, 1828) - (HYGROMIIDAE)
- claustralis, Pupilla claustralis P.V. Gredler, 1856 - syn of: Truncatellina claustralis (P.V. Gredler, 1856) - (PUPILLIDAE)
- claustralis, Gulella claustralis M. Connolly, 1939 - (STREPTAXIDAE)
- claustralis, Truncatellina claustralis (P.V. Gredler, 1856) - (VERTIGINIDAE)
- claustralis anodus, Pupilla claustralis anodus P.V. Gredler, 1856 - syn of: Truncatellina claustralis (P.V. Gredler, 1856) - (PUPILLIDAE)
- claustrata, Conotoma claustrata (Lindström, 1884 †) - (GOSSELETINIDAE) (FOSSIL)
- claustrata, Pleurotomaria claustrata Lindström, 1884 † - syn of: Conotoma claustrata (Lindström, 1884 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- clausulatus, Segmentina clausulatus A.E.J. Férussac, 1820 - syn of: Segmentina nitida (O.F. Müller, 1774) - (PLANORBIDAE)
- clausum, Pycnoceras clausum Ulrich & al., 1942 † - (ESTONIOCERATIDAE) (FOSSIL)
- clausum, Hammatoceras clausum Gabilly 1973 † - (HAMMATOCERATIDAE) (FOSSIL)
- clausum, Popanoceras clausum C. Gemmellaro, 1887 † - syn of: Neopopanoceras clausum (C. Gemmellaro, 1887 †) - (PARAPOPANOCERATIDAE) (FOSSIL)
- clausum, Neopopanoceras clausum (C. Gemmellaro, 1887 †) - (PROCARNITIDAE) (FOSSIL)
- clausum, Linguatornoceras clausum (Glenister, 1958 †) - (TORNOCERATIDAE) (FOSSIL)
- clausus, Arcestes clausus Mojsisovics, 1875 † - (ARCESTIDAE) (FOSSIL)
- clausus, Bellerophon clausus C. Gemmellaro, 1889 † - (BELLEROPHONTIDAE) (FOSSIL)
- clausus, Sphenosphaera clausus Ulrich & Scofield, 1897 † - syn of: Sphenosphaera rogersensis (Foerste, 1914 †) - (BELLEROPHONTIDAE) (FOSSIL)
- clausus, Sornayites clausus (Sarasin & Schöndelmayer, 1902 †) - (CRIOCERATITIDAE) (FOSSIL)
- clausus, Loripes clausus (R.A. Philippi, 1848) - (LUCINIDAE)
- clausus, Tomigerus clausus J.B. von Spix, 1827 - (ODONTOSTOMIDAE)
- clausus, Brodieia clausus Merla 1932 † - (PHYMATOCERATIDAE) (FOSSIL)
- clausus, Mesodon clausus T. Say, 1821 - (POLYGYRIDAE)
- clausus, Parviturboides clausus (H.A. Pilsbry & A.A. Olsson, 1945) - (TORNIDAE)
- clausus, Tornus clausus A. Adams, 1861 - (TORNIDAE)
- clausus, Cantharidoscops clausus (A.N. Golikov & V.V. Gulbin, 1978) - (TROCHIDAE)
- clausus flexuosus, Sornayites clausus flexuosus (Sarkar, 1955 †) - (CRIOCERATITIDAE) (FOSSIL)
- clauticae, Medfrazyga clauticae Frýda & Blodgett, 2004 † - (PALAEOZYGOPLEURIDAE) (FOSSIL)
- clava, Bulimus clava L.A. Reeve, 1849 - syn of: Sigmataxis procerus (C.B. Adams, 1845) - (BULIMULIDAE)
- clava, Caecum clava L. de Folin, 1867 - (CAECIDAE)
- clava, Pseudovertagus clava (J.F. Gmelin, 1791) - (CERITHIIDAE)
- clava, Pseudovertagus clava J.H. Chemnitz, 1791 - syn of: Pseudovertagus clava (J.F. Gmelin, 1791) - (CERITHIIDAE)
- Clava, syn of: Genus Rhinoclavis W.J. Swainson, 1840 (CERITHIIDAE)
- clava, Socienna clava (C.F. Laseron, 1951) - (CERITHIOPSIDAE)
- clava, Hemiphaedusa odontochila clava C.K. Chang & T. Okubo, 1994 - (CLAUSILIIDAE)
- clava, Clio clava P.C.A.S.L. Rang, 1828 - syn of: Creseis clava (P.C.A.S.L. Rang, 1828) - (CLIIDAE)
- clava, Coelostylina clava Böhm, 1895 † - (COELOSTYLINIDAE) (FOSSIL)
- clava, Creseis clava (P.C.A.S.L. Rang, 1828) - (CRESEIDAE)
- clava, Gomphoceras clava Barrande, 1865 † - syn of: Umbeloceras clava (Barrande, 1865 †) - (DIESTOCERATIDAE) (FOSSIL)
- clava, Splendrillia clava Powell, 1942 † - (DRILLIIDAE) (FOSSIL)
- clava, Pleuroploca clava (I.H. Jonas, 1846) - (FASCIOLARIIDAE)
- clava, Umbeloceras clava (Barrande, 1865 †) - (MANDALOCERATIDAE) (FOSSIL)
- clava, Melanopsis clava C.L.F. von Sandberger, 1875 † - (MELANOPSIDAE) (FOSSIL)
- clava, Brachidontes clava O.A.L. Mörch, 1853 - syn of: Geukensia demissa (Dilwyn, 1817) - (MYTILIDAE)
- clava, Geukensia clava O.A.L. Mörch, 1853 - syn of: Geukensia demissa (Dilwyn, 1817) - (MYTILIDAE)
- clava, Archivolva clava (T. Habe, 1991) - (OVULIDAE)
- clava, Bocageia clava (L. Pfeiffer, 1852) - (SUBULINIDAE)
- clava, Uperotus clava (J.F. Gmelin, 1791) - (TEREDINIDAE)
- clava, Teredo clava J.F. Gmelin, 1791 - syn of: Uperotus clava (J.F. Gmelin, 1791) - (TEREDINIDAE)
- clava, Fistulana clava J.B.P.A. Lamarck, 1801 - syn of: Eufistulana mumia (L. Spengler, 1783) - (TEREDINIDAE)
- clava, Pleurobema clava J.B.P.A. Lamarck, 1819 - (UNIONIDAE)
- clava, Heterocoptis clava C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- clava, Cylindrella clava L. Pfeiffer, 1865 - syn of: Coelocentrum tomacella clava (L. Pfeiffer, 1856) - (UROCOPTIDAE)
- clava, Coelocentrum tomacella clava (L. Pfeiffer, 1856) - (UROCOPTIDAE)
- clava coniungens, Melanopsis clava coniungens F. Sacco, 1886 † - (MELANOPSIDAE) (FOSSIL)
- clava rufescens, Coelocentrum clava rufescens E.C. Von Martens, 1897 - syn of: Coelocentrum tomacella rufescens E.C. Von Martens, 1897 - (UROCOPTIDAE)
- clava taurinensis, Melanopsis clava taurinensis F. Sacco, 1889 † - (MELANOPSIDAE) (FOSSIL)
- clavaeforme, Heligmotoma clavaeforme Bohm, 1926 † - (MELONGENIDAE) (FOSSIL)
- clavaeformis, Brotia clavaeformis (A. Brot, 1874) - (PACHYCHILIDAE)
- clavaeformis, Elimia clavaeformis (I. Lea, 1841) - (PLEUROCERIDAE)
- clavaeformis, Goniobasis clavaeformis I. Lea, 1841 - syn of: Elimia clavaeformis (I. Lea, 1841) - (PLEUROCERIDAE)
- clavaeformis, Melania clavaeformis I. Lea, 1841 - syn of: Elimia clavaeformis (I. Lea, 1841) - (THIARIDAE)
- clavaeformis, Melania clavaeformis A. Brot, 1874 - syn of: Brotia clavaeformis (A. Brot, 1874) - (THIARIDAE)
- clavaeformis acutocarinata, Elimia clavaeformis acutocarinata (I. Lea, 1841) - (PLEUROCERIDAE)
- clavaeformis unciale, Elimia clavaeformis unciale (S.S. Haldeman, 1841) - (PLEUROCERIDAE)
- Clavagella, Genus Clavagella Blainville [ex Lamarck], 1817 † (CLAVAGELLIDAE) (FOSSIL)
- CLAVAGELLIDAE d'Orbigny, 1844 - Family (BIVALVIA-HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-ANOMALODESMATA [Order]-CLAVAGELLOIDEA [Superfamily])
- clavaherculis, Murex clavaherculis P.F. Röding, 1798 - syn of: Bolinus brandaris (C. Linnaeus, 1758) - (MURICIDAE)
- clavalata, Dendrodoris clavalata J. Alder & A. Hancock, 1864 - syn of: Dendrodoris krusensternii (J.E. Gray, 1850) - (DENDRODORIDIDAE)
- Clavarizona, Subgenus Liolophura (Clavarizona) A.F.B. Hull, 1923 (CHITONIDAE)
- clavata, Rhyssoplax clavata H.H. Suter, 1907 - syn of: Rhyssoplax aereus (L.A. Reeve, 1847) - (CHITONIDAE)
- clavata, Chromodoris clavata J.J. Risbec, 1928 - syn of: Chromodoris lineolata (J.C. van Hasselt, 1824) - (CHROMODORIDIDAE)
- clavata, Charpentieria clavata (E.A. Rossmässler, 1836) - (CLAUSILIIDAE)
- clavata, Carminodoris clavata C.N.E. Eliot, 1910 - (DISCODORIDIDAE)
- clavata, Artachaea clavata (C.N.E. Eliot, 1907) - (DISCODORIDIDAE)
- clavata, Clavus clavata (G.B. I Sowerby, 1870) - (DRILLIIDAE)
- clavata, Notomya clavata F. McCoy, 1847 † - syn of: Pyramus myiformis J.B.M. Dana, 1847 † - (EDMONDIIDAE) (FOSSIL)
- clavata, Fasciolaria clavata J.P.S. Grateloup, 1847 † - (FASCIOLARIIDAE) (FOSSIL)
- clavata, Gadila clavata (A.A. Gould, 1859) - (GADILIDAE)
- clavata, Lymnaea clavata (C.A. Westerlund, 1885) - (LYMNAEIDAE)
- clavata, Mangelia clavata G.B. I Sowerby, 1870 - syn of: Clavus clavata (G.B. I Sowerby, 1870) - (MANGELIIDAE)
- clavata, Coelocaulus clavata J. Perner, 1907 † - (MURCHISONIIDAE) (FOSSIL)
- clavata, Natica clavata G.B. II Sowerby, 1883 - syn of: Polinices peselephanti (J.H.F. Link, 1807) - (NATICIDAE)
- clavata, Nucula clavata (P. Calcara, 1841 †) - (NUCULIDAE) (FOSSIL)
- clavata, Ostrea clavata G.S. Poli, 1795 - syn of: Pseudamussium clavatum (G.S. Poli, 1795) - (OSTREIDAE)
- clavata, Martesia clavata J.B.P.A. Lamarck, 1818 - syn of: Martesia striata (C. Linnaeus, 1758) - (PHOLADIDAE)
- clavata, Solariella clavata R.B. Watson, 1879 - (SOLARIELLIDAE)
- clavata, Fistulana clavata L. Oken, 1815 - syn of: Uperotus clava (J.F. Gmelin, 1791) - (TEREDINIDAE)
- clavata, Sheppardiconcha clavata Wesselingh, 2006 † - (THIARIDAE) (FOSSIL)
- clavata, Mastonia clavata (W.H. Pease, 1861) - (TRIPHORIDAE)
- clavata balsamoi, Charpentieria clavata balsamoi (P. von Ströbel, 1850) - (CLAUSILIIDAE)
- clavata lorinae, Charpentieria clavata lorinae (P.V. Gredler, 1869) - (CLAUSILIIDAE)
- clavata thomasiana, Charpentieria clavata thomasiana H.C. Küster, 1850 - syn of: Charpentieria dyodon thomasiana (H.C. Küster, 1850) - (CLAUSILIIDAE)
- clavata tiesenhauseni, Charpentieria clavata tiesenhauseni (P.V. Gredler, 1885) - (CLAUSILIIDAE)
- clavata trepida, Charpentieria clavata trepida F. Käufel, 1928 - syn of: Charpentieria clavata lorinae (P.V. Gredler, 1869) - (CLAUSILIIDAE)
- clavata triumplinae, Charpentieria clavata triumplinae G. Nardi, 2011 - (CLAUSILIIDAE)
- clavata variscoi, Charpentieria clavata variscoi N. Pini, 1883 - (CLAUSILIIDAE)
- clavatoides, Pseudodicoelites clavatoides Sachs, 1975 † - (PSEUDODICOELITIDAE) (FOSSIL)
- Clavatoma, Genus Clavatoma Powell, 1942 (PSEUDOMELATOMIDAE)
- Clavator, Genus Clavator E.C. Von Martens in J.A. Albers, 1860 (ACAVIDAE)
- clavator, Clavator clavator (S.A.A. Petit De La Saussaye, 1844) - (ACAVIDAE)
- clavator, Murex clavator L.W. Dillwyn, 1817 - syn of: Ranularia gutturnia (P.F. Röding, 1798) - (MURICIDAE)
- clavator, Ranularia clavator L.W. Dillwyn, 1817 - syn of: Ranularia gutturnia (P.F. Röding, 1798) - (RANELLIDAE)
- clavator, Cymatium clavator L.W. Dillwyn, 1817 - syn of: Ranularia gutturnia (P.F. Röding, 1798) - (RANELLIDAE)
- clavatula, Narona clavatula (Sowerby, 1832) - (CANCELLARIIDAE)
- Clavatula, Genus Clavatula J.B.P.A. Lamarck, 1801 (CLAVATULIDAE)
- clavatula, Anachis clavatula A.A. Olsson & A. Harbison, 1953 † - (COLUMBELLIDAE) (FOSSIL)
- clavatula, Streptostyla clavatula C.M.F. Ancey, 1903 - (SPIRAXIDAE)
- clavatula, Gonospira clavatula (J.B.P.A. Lamarck, 1822) - (STREPTAXIDAE)
- CLAVATULIDAE Gray, 1853 - Family (GASTROPODA-CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-CONOIDEA [Superfamily])
- clavatulus, Conus clavatulus Orbigny, 1852 † - (CONIDAE) (FOSSIL)
- clavatulus, Conus clavatulus d'Orbigny, 1852 † - (CONIDAE) (FOSSIL)
- clavatulus, Atractites clavatulus Smith, 1914 † - (XIPHOTEUTHIDIDAE) (FOSSIL)
- clavatum, Waagenoceras clavatum Plummer & P.H. Scott, 1937 † - syn of: Mexicoceras guadalupense (Girty, 1909 †) - (CYCLOLOBIDAE) (FOSSIL)
- clavatum, Dentalium clavatum A.A. Gould, 1859 - syn of: Gadila clavata (A.A. Gould, 1859) - (DENTALIIDAE)
- clavatum, Barnesoceras clavatum Flower, 1964 † - (ELLESMEROCERATIDAE) (FOSSIL)
- clavatum, Haustellum clavatum H.C.F. Schumacher, 1817 - syn of: Bolinus brandaris (C. Linnaeus, 1758) - (MURICIDAE)
- clavatum, Pseudamussium clavatum (G.S. Poli, 1795) - (PECTINIDAE)
- clavatum, Penicillus clavatum J.C. Chenu, 1842 - syn of: Verpa philippinensis (J.C. Chenu, 1843) - (PENICILLIDAE)
- clavatum, Lotoria clavatum P.F. Röding, 1798 - syn of: Ranularia pyrum (C. Linnaeus, 1758) - (RANELLIDAE)
- clavatum dumasii, Pseudamussium clavatum dumasii (B.C.M. Payraudeau, 1826) - (PECTINIDAE)
- clavatus, Belemnites clavatus Blain, 1820 † - (BELEMNITELLIDAE) (FOSSIL)
- clavatus, Belemnites clavatus von Schlotheim, 1820 † - syn of: Hastites clavatus (von Schlotheim, 1820 †) - (BELEMNITELLIDAE) (FOSSIL)
- clavatus, Echinogurges clavatus (R.B. Watson, 1879) - (CALLIOTROPIDAE)
- clavatus, Conus clavatus J.B.P.A. Lamarck, 1810 † - (CONIDAE) (FOSSIL)
- clavatus, Conus clavatus P.F. Röding, 1798 - syn of: Graphiconus cinereus (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- clavatus, Fusinus clavatus (G.B. Brocchi, 1814 †) - (FASCIOLARIIDAE) (FOSSIL)
- clavatus, Fusus clavatus S. Delle Chiaje, 1830 - syn of: Fusinus rostratus (A.G. Olivi, 1792) - (FASCIOLARIIDAE)
- clavatus, Hastites clavatus (von Schlotheim, 1820 †) - (HASTITIDAE) (FOSSIL)
- clavatus, Hildaites clavatus Sassaroli & Venturi, 2010 † - (HILDOCERATIDAE) (FOSSIL)
- clavatus, Guembelites clavatus McLearn, 1939 † - (JUVAVITIDAE) (FOSSIL)
- clavatus, Boreotrophon clavatus (G.O. Sars, 1878) - (MURICIDAE)
- clavatus, Hypacanthoplites clavatus (Fritel, 1906 †) - (PARAHOPLITIDAE) (FOSSIL)
- clavatus, Leptodomus clavatus (R Etheridge junior) † - (SANGUINOLITIDAE) (FOSSIL)
- clavatus helvetica, Fusinus clavatus helvetica M.A. Peyrot, 1925 † - (FASCIOLARIIDAE) (FOSSIL)
- clavatus monocostatus, Hypacanthoplites clavatus monocostatus T.L. Casey † - (PARAHOPLITIDAE) (FOSSIL)
- claveli, Xeroleuca brulardi claveli (P.M. Pallary, 1918) - (HYGROMIIDAE)
- clavella, Leiostraca clavella (A. Adams, 1861) - (EULIMIDAE)
- clavella, Eulima clavella A. Adams, 1861 - syn of: Leiostraca clavella (A. Adams, 1861) - (EULIMIDAE)
- Clavella, Genus Clavella Swainson, 1835 † (FASCIOLARIIDAE) (FOSSIL)
- clavella, Taphon clavella (L.A. Reeve, 1847) - (MELONGENIDAE)
- clavella, Pyrula clavella L.A. Reeve, 1847 - syn of: Taphon clavella (L.A. Reeve, 1847) - (MELONGENIDAE)
- clavella, Pupilla clavella O.W.H. Reinhardt, 1877 - syn of: Truncatellina claustralis (P.V. Gredler, 1856) - (PUPILLIDAE)
- clavella, Truncatellina clavella W. Kobelt, 1899 - syn of: Truncatellina claustralis (P.V. Gredler, 1856) - (VERTIGINIDAE)
- clavellatus, Clavilithes clavellatus (J.B.P.A. Lamarck, 1803 †) - (FASCIOLARIIDAE) (FOSSIL)
- Clavellofusus, Genus Clavellofusus Grabau, 1904 † (FASCIOLARIIDAE) (FOSSIL)
- clavelloides, Clavilithes clavelloides A.W. Grabau, 1904 † - (FASCIOLARIIDAE) (FOSSIL)
- clavellosa, Syrnola clavellosa J.C. Melvill, 1906 - (PYRAMIDELLIDAE)
- claverana, Trichia claverana (J.R. Bourguignat, 1877) - (HYGROMIIDAE)
- Clavicantha, syn of: Genus Clavus P.D. Montfort, 1810 (DRILLIIDAE)
- clavicola, Bistolida stolida clavicola F.Jr. Lorenz, 1998 - (CYPRAEIDAE)
- Clavicosta, Genus Clavicosta Newell, 1938 † (AVICULOPECTINIDAE) (FOSSIL)
- clavicula, Mauidrillia clavicula Powell, 1942 † - (HORAICLAVIDAE) (FOSSIL)
- clavicula, Hormotoma clavicula Oehlert & Oehlert, 1888 † - syn of: Barocospira clavicula (Oehlert & Oehlert, 1888 †) - (MURCHISONIIDAE) (FOSSIL)
- clavicula, Barocospira clavicula (Oehlert & Oehlert, 1888 †) - (PENDROMIDAE) (FOSSIL)
- clavicularis, Cryptoconus priscus clavicularis (J.B.P.A. Lamarck, 1804 †) - (CONIDAE) (FOSSIL)
- claviculata, Anomia claviculata P.P. Carpenter, 1857 - syn of: Anomia peruviana A.V.M.D. D'Orbigny, 1846 - (ANOMIIDAE)
- claviculata, Neaera claviculata W.H. Dall, 1881 - syn of: Halonympha claviculata (W.H. Dall, 1881) - (CUSPIDARIIDAE)
- claviculata, Halonympha claviculata (W.H. Dall, 1881) - (HALONYMPHIDAE)
- claviculata, Clidiophora claviculata (Carpenter, 1856) - (PANDORIDAE)
- claviculta, Mastonia claviculta (C.F. Laseron, 1958) - (TRIPHORIDAE)
- claviculus, Austrofusus claviculus L. C. King, 1933 † - (BUCCINIDAE) (FOSSIL)
- clavidens, Venericor clavidens (Grzybowski, 1899 †) - (CARDITIDAE) (FOSSIL)
- Claviderma, Genus Claviderma A.H. Scheltema & D.L. Ivanov, 2000 (PROCHAETODERMATIDAE)
- Clavidrupa, Genus Clavidrupa MacNeil & Dockery, 1984 † (NEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- clavifer, Pictonautilus clavifer (Tinant, 1994 †) - (CENOCERATIDAE) (FOSSIL)
- claviforma, Leucosyrinx claviforma (S. Kosuge, 1992) - (PSEUDOMELATOMIDAE)
- claviforme, Cerithium claviforme M.M. Schepman, 1907 - (CERITHIIDAE)
- claviformis, Baculites claviformis L.W. Stephenson, 1941 † - (BACULITIDAE) (FOSSIL)
- claviformis, Bostryx claviformis F. Haas, 1951 - (BULIMULIDAE)
- claviformis, Tauphaedusa claviformis (L. Pfeiffer, 1850) - (CLAUSILIIDAE)
- claviformis, Conus claviformis Speyer, 1863 † - (CONIDAE) (FOSSIL)
- claviformis, Cuthona claviformis N. Vicente, 1974 - (FIONIDAE)
- claviformis, Laevilitorina claviformis H.B. Preston, 1916 - (LITTORINIDAE)
- claviformis, Nuculana claviformis Sowerby, 1824 † - (NUCULANIDAE) (FOSSIL)
- claviformis, Holospira claviformis E.C. Von Martens, 1897 - syn of: Coelostemma elizabethae (H.A. Pilsbry, 1889) - (UROCOPTIDAE)
- Clavigella, syn of: Genus Clavagella Blainville [ex Lamarck], 1817 † (CLAVAGELLIDAE) (FOSSIL)
- claviger, Belemnites claviger L. Waagen, 1875 † - (BELEMNITELLIDAE) (FOSSIL)
- claviger, Venericor claviger (Gardner & E. Bowles, 1936 †) - (CARDITIDAE) (FOSSIL)
- clavigera, Prodoris clavigera (K.H.J. Thiele, 1912) - (BATHYDORIDIDAE)
- clavigera, Bathydoris clavigera K.H.J. Thiele, 1912 - syn of: Prodoris clavigera (K.H.J. Thiele, 1912) - (BATHYDORIDIDAE)
- clavigera, Doris clavigera O.F. Müller, 1776 - syn of: Limacia clavigera (O.F. Müller, 1776) - (DORIDIDAE)
- clavigera, Stoliczkaia clavigera M. von Neumayr, 1875 † - (LYELLICERATIDAE) (FOSSIL)
- clavigera, Melanopsis clavigera M. von Neumayr in M. von Neumayr & C.R.C. Paul, 1875 † - (MELANOPSIDAE) (FOSSIL)
- clavigera, Reishia clavigera (H.C. Küster, 1860) - (MURICIDAE)
- clavigera, Thais clavigera H.C. Küster, 1860 - syn of: Reishia clavigera (H.C. Küster, 1860) - (MURICIDAE)
- clavigera, Notomenia clavigera K.H.J. Thiele, 1897 - (NOTOMENIIDAE)
- clavigera, Limacia clavigera (O.F. Müller, 1776) - (POLYCERIDAE)
- clavigera cesticillus, Melanopsis clavigera cesticillus Š. Brusina, 1897 † - syn of: Melanopsis clavigera M. von Neumayr in M. von Neumayr & C.R.C. Paul, 1875 † - (MELANOPSIDAE) (FOSSIL)
- Clavigerina, syn of: Genus Pachymelania E.A. Smith, 1893 (THIARIDAE)
- clavigeroi, Coelocentrum clavigeroi G.D. Hanna, 1923 - syn of: Spartocentrum irregularis clavigeroi (G.D. Hanna, 1923) - (UROCOPTIDAE)
- clavigeroi, Spartocentrum irregularis clavigeroi (G.D. Hanna, 1923) - (UROCOPTIDAE)
- clavigerum, Notobryon clavigerum K. Baba, 1937 - (SCYLLAEIDAE)
- Clavilithes, Genus Clavilithes Swainson, 1840 † (FASCIOLARIIDAE) (FOSSIL)
- clavilithoides, Fusinus clavilithoides Landau, Harzhauser, Büyükmeriç & Breitenberger, 2016 † - (FASCIOLARIIDAE) (FOSSIL)
- clavilobum, Synpharciceras clavilobum (C.L.F. von Sandberger, 1850 †) - (PHARCICERATIDAE) (FOSSIL)
- clavilobus, Goniatites clavilobus C.L.F. von Sandberger, 1850 † - syn of: Synpharciceras clavilobum (C.L.F. von Sandberger, 1850 †) - (GONIATITIDAE) (FOSSIL)
- Clavinautilus, Genus Clavinautilus Zhao & al., 1978 † (TAINOCERATIDAE) (FOSSIL)
- Clavipholas, Genus Clavipholas Conrad, 1868 † (PHOLADIDAE) (FOSSIL)
- clavis, Cerithium clavis G.B. II Sowerby, 1865 - syn of: Cerithium interstriatum G.B. II Sowerby, 1855 - (CERITHIIDAE)
- clavis, Hiatella clavis A. Valenciennes, 1846 - syn of: Hiatella arctica (C. Linnaeus, 1767) - (HIATELLIDAE)
- Claviscala, Genus Claviscala De Boury, 1909 (EPITONIIDAE)
- clavisellatum, Pseudosageceras clavisellatum Noetling, 1905 † - syn of: Pseudosageceras multilobatum Noetling, 1905 † - (HEDENSTROEMIIDAE) (FOSSIL)
- clavisherculis, Murex clavisherculis P.F. Röding, 1798 - syn of: Bolinus brandaris (C. Linnaeus, 1758) - (MURICIDAE)
- Clavistrombina, Genus Clavistrombina P.O. Jung, 1989 (COLUMBELLIDAE)
- Clavitrigonia, syn of: Genus Myophorella Bayle, 1878 † (MYOPHORELLIDAE) (FOSSIL)
- Clavitrigonia, syn of: Genus Myophorella Bayle, 1878 † (MYOPHORELLIDAE) (FOSSIL)
- clavium, Teinostoma clavium H.A. Pilsbry & J.T.L. McGinty, 1945 - syn of: Teinostoma semistriatum (A.V.M.D. D'Orbigny, 1842) - (TORNIDAE)
- Clavocerithium, Genus Clavocerithium A.E.M. Cossmann, 1889 (CERITHIIDAE)
- Clavosurcula, Genus Clavosurcula M.M. Schepman, 1913 (COCHLESPIRIDAE)
- clavosus, Faunus clavosus (J.B.P.A. Lamarck, 1804 †) - (PACHYCHILIDAE) (FOSSIL)
- Clavotrigonia, syn of: Genus Myophorella Bayle, 1878 † (MYOPHORELLIDAE) (FOSSIL)
- Clavstoma, Genus Clavstoma † (NEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- clavula, Cerithium vulgatum clavula T.A. de M. Monterosato, 1917 - (CERITHIIDAE)
- clavula, Cerithiopsis clavula A. Adams, 1861 - (CERITHIOPSIDAE)
- clavula, Cumia clavula G.T. Watters, 2009 - (COLUBRARIIDAE)
- clavula, Melanella clavula (A. Adams, 1861) - (EULIMIDAE)
- clavula, Olivella clavula J.B.P.A. Lamarck, 1810 † - syn of: Anazola clavula (J.B.P.A. Lamarck, 1810 †) - (OLIVELLIDAE) (FOSSIL)
- clavula, Anazola clavula (J.B.P.A. Lamarck, 1810 †) - (OLIVIDAE) (FOSSIL)
- clavula, Elimia acuta clavula I. Lea, 1868 - (PLEUROCERIDAE)
- clavula, Liostomia clavula (S.L. Lovén, 1846) - (PYRAMIDELLIDAE)
- clavula, Turbonilla clavula S.L. Lovén, 1846 - syn of: Liostomia clavula (S.L. Lovén, 1846) - (PYRAMIDELLIDAE)
- clavula, Rissoina clavula (G.P. Deshayes, 1825 †) - (RISSOINIDAE) (FOSSIL)
- clavula adulta, Oliva clavula adulta J.P.S. Grateloup, 1847 † - syn of: Anazola clavula (J.B.P.A. Lamarck, 1810 †) - (OLIVIDAE) (FOSSIL)
- clavula angustata, Olivella clavula angustata F. Sacco, 1890 † - syn of: Anazola clavula (J.B.P.A. Lamarck, 1810 †) - (OLIVELLIDAE) (FOSSIL)
- clavula junior, Oliva clavula junior J.P.S. Grateloup, 1847 † - syn of: Anazola clavula (J.B.P.A. Lamarck, 1810 †) - (OLIVIDAE) (FOSSIL)
- clavula vindobonensis, Olivella clavula vindobonensis M. Csepreghy, 1954 † - syn of: Oliva vindobonensis M. Csepreghy, 1954 † - (OLIVELLIDAE) (FOSSIL)
- clavulata, Dendrodoris clavulata J. Alder & A. Hancock, 1864 - syn of: Dendrodoris nicobarica (L.S.R. Bergh, 1875) - (DENDRODORIDIDAE)
- clavulata, Bulinus clavulata P.M.A. Morelet, 1868 - syn of: Pyrgophysa forskalii (C.G. Ehrenberg, 1831) - (PLANORBIDAE)
- clavuliformis, Liostomia clavuliformis K.H.J. Thiele, 1930 - (PYRAMIDELLIDAE)
- clavulina, Odostomia clavulina P. Fischer, 1877 - (PYRAMIDELLIDAE)
- clavulinum, Umbeloceras clavulinum (Flower, 1952 †) - (MANDALOCERATIDAE) (FOSSIL)
- clavulinum, Allopeas clavulinum (V.L.V. Potiez & A. Michaud, 1838) - (SUBULINIDAE)
- clavulinum hawaiiense, Allopeas clavulinum hawaiiense E.R. Sykes, 1904 - syn of: Allopeas clavulinum (V.L.V. Potiez & A. Michaud, 1838) - (SUBULINIDAE)
- clavulinum kyotoense, Allopeas clavulinum kyotoense (H.A. Pilsbry & Y. Hirase, 1904) - (SUBULINIDAE)
- clavulosa, Myophorella clavulosa (Rigaux & H.É. Sauvage, 1868 †) - (MYOPHORELLIDAE) (FOSSIL)
- clavulus, Bulimus clavulus J.B.P.A. Lamarck, 1804 † - (BULIMULIDAE) (FOSSIL)
- clavulus, Bulimus clavulus W. Turton, 1831 - syn of: Opeas hannensis (P.C.A.S.L. Rang, 1831) - (BULIMULIDAE)
- clavulus, Dentiphaedusa spinula clavulus (P.M. Heude, 1886) - (CLAUSILIIDAE)
- clavulus, Clavistrombina clavulus (Sowerby, 1834) - (COLUMBELLIDAE)
- clavulus, Helix clavulus A.E.J. Férussac, 1832 - syn of: Opeas hannensis (P.C.A.S.L. Rang, 1831) - (HELICIDAE)
- clavulus, Opeas clavulus A.E.J. Férussac, 1832 - syn of: Opeas hannensis (P.C.A.S.L. Rang, 1831) - (SUBULINIDAE)
- clavus, Conus clavus C. Linnaeus, 1758 † - (CONIDAE) (FOSSIL)
- clavus, Dentalium clavus A.H. Cooke, 1885 - syn of: Dentalium reevei P. Fischer, 1871 - (DENTALIIDAE)
- Clavus, Genus Clavus P.D. Montfort, 1810 (DRILLIIDAE)
- clavus, Murex clavus L.C. Kiener, 1842 - syn of: Pterynotus elongatus (J. Lightfoot, 1786) - (MURICIDAE)
- clavus, Cerithiella clavus (J.B.P.A. Lamarck, 1804 †) - (NEWTONIELLIDAE) (FOSSIL)
- clavus, Pyramidella clavus (H.A. Pilsbry, 1906) - (PYRAMIDELLIDAE)
- clavus, Tibia clavus C. Linnaeus, 1771 - syn of: Tibia fusus (C. Linnaeus, 1758) - (ROSTELLARIIDAE)
- clavus, Scaphander clavus W.H. Dall, 1889 - syn of: Scaphander punctostriatus (J.W. Mighels & C.B. Adams, 1842) - (SCAPHANDRIDAE)
- clavus, Strombus clavus C. Linnaeus, 1771 - syn of: Tibia fusus (C. Linnaeus, 1758) - (STROMBIDAE)
- clavus, Obeliscus clavus H.A. Pilsbry, 1906 - (SUBULINIDAE)
- clavus, Stenomelania clavus (J.B.P.A. Lamarck, 1822) - (THIARIDAE)
- clavus flavus, Obeliscus clavus flavus H.A. Pilsbry, 1906 - (SUBULINIDAE)
- claxbiense, Unicardium claxbiense Woods † - (MACTROMYIDAE) (FOSSIL)
- claxbiensis, Astarte claxbiensis H. Woods, 1906 † - (ASTARTIDAE) (FOSSIL)
- claxbiensis, Corbicella claxbiensis Woods † - (TANCREDIIDAE) (FOSSIL)
- claxtonensis, Waagenella claxtonensis Thein & Nitecki, 1974 † - (BELLEROPHONTIDAE) (FOSSIL)
- claydoni, Typhisopsis claydoni R. Houart, 1988 - (MURICIDAE)
- claydoni, Exilia hilgendorfi claydoni M.G. Harasewych, 1987 - (PTYCHATRACTIDAE)
- claydoni, Calliotectum dalli claydoni (G.T. Poppe, 1986) - (VOLUTIDAE)
- clayi, Liardetia clayi E.A. Liardet - syn of: Liardetia samoensis E.A. Liardet - (EUCONULIDAE)
- clayi, Athleta clayi Smith, 1907 † - (VOLUTIDAE) (FOSSIL)
- claysferryensis, Cyrtolites claysferryensis Wahlman, 1992 † - (CYRTOLITIDAE) (FOSSIL)
- claytonensis, Isolimea claytonensis (R.E. Dickerson, 1914 †) - (ISOLIMEIDAE) (FOSSIL)
- claytonensis, Lima claytonensis R.E. Dickerson, 1914 † - syn of: Isolimea claytonensis (R.E. Dickerson, 1914 †) - (LIMIDAE) (FOSSIL)
- claytoni, Semele claytoni C.J. Maury, 1917 † - (SEMELIDAE) (FOSSIL)
- claytonrayi, Astarte claytonrayi Ward, 1992 † - (ASTARTIDAE) (FOSSIL)
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