- cotabatoensis, Amphidromus maculiferus cotabatoensis P. Bartsch, 1917 - (CAMAENIDAE)
- cotamago, Hyalina cotamago M. Yokoyama, 1922 - (MARGINELLIDAE)
- cotapaxi, Agaronia cotapaxi A.A. Olsson, 1931 † - (OLIVIDAE) (FOSSIL)
- cotei, Orecopia cotei Pedder, 1966 † - (OMPHALOTROCHIDAE) (FOSSIL)
- cothurnata, Notocochlis cothurnata T. Iredale, 1936 - syn of: Tanea sagittata (K.T. Menke, 1843) - (NATICIDAE)
- cothurnata, Tanea cothurnata T. Iredale, 1929 - syn of: Tanea euzona (C.A. Récluz, 1844) - (NATICIDAE)
- coticazae, Neverita didyma coticazae J. Makiyama, 1926 - (NATICIDAE)
- cotiellae, Pyrenaearia cotiellae (P. Fagot, 1906) - (HYGROMIIDAE)
- cotinados, Olivella cotinados J. Gardner, 1937 † - (OLIVELLIDAE) (FOSSIL)
- cotinga, Glycymeris cotinga (T. Iredale, 1939) - (GLYCYMERIDIDAE)
- cotinophila, Monacha cotinophila J.R. Bourguignat in É.A.A. Locard, 1882 - syn of: Eutheba cantiana (G. Montagu, 1803) - (HYGROMIIDAE)
- cotis, Sonorella walkeri cotis H.A. Pilsbry & J.H. Ferriss, 1919 - (HELMINTHOGLYPTIDAE)
- Cotitrochus, Subgenus Trochomorpha (Cotitrochus) F.C. Baker, 1941 (TROCHOMORPHIDAE)
- cotonea, Volema cotonea P.F. Röding, 1798 - syn of: Volema pyrum (J.F. Gmelin, 1791) - (MELONGENIDAE)
- Cotonopsis, Subgenus Strombina (Cotonopsis) A.A. Olsson, 1942 (COLUMBELLIDAE)
- cotopaxiensis, Vermiculatus cotopaxiensis (L. Pfeiffer, 1853) - (BULIMULIDAE)
- cotorricola, Pycnoptychia trina cotorricola C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- cotrocenensis, Melanopsis cotrocenensis Cobalcescu, 1883 † - (MELANOPSIDAE) (FOSSIL)
- cotsoldiae, Discohelix cotsoldiae Wendt, 1968 † - (DISCOHELICIDAE) (FOSSIL)
- cotswoldense, Brachytrema cotswoldense Cox & Arkell † - (BRACHYTREMATIDAE) (FOSSIL)
- cotswoldensis, Naricopsina cotswoldensis L.R. Cox & Arkell, 1950 † - (NARICOPSINIDAE) (FOSSIL)
- cotswoldensis, Pleurotomaria cotswoldensis Cox & Arkell † - (PLEUROTOMARIIDAE) (FOSSIL)
- cotswoldiae, Discohelix cotswoldiae Wendt, 1968 † - (DISCOHELICIDAE) (FOSSIL)
- cottai, Goniatites cottai G.G. Münster, 1839 † - syn of: Gonioclymenia speciosa (G.G. Münster, 1831 †) - (GONIATITIDAE) (FOSSIL)
- cottaldinum, Pratulum cottaldinum (d'Orbigny 1844) † - (CARDIIDAE) (FOSSIL)
- cottardi orientalis, Scrobicularia cottardi orientalis P.M. Pallary, 1938 - syn of: Scrobicularia cottardii (B.C.M. Payraudeau, 1826) - (SCROBICULARIIDAE)
- cottardiense, Beaniceras cottardiense Dommergues & Mouterde, 1978 † - (LIPAROCERATIDAE) (FOSSIL)
- cottardii, Lutraria cottardii B.C.M. Payraudeau, 1826 - syn of: Scrobicularia cottardii (B.C.M. Payraudeau, 1826) - (MACTRIDAE)
- cottardii, Scrobicularia cottardii (B.C.M. Payraudeau, 1826) - (SCROBICULARIIDAE)
- cotterallae, Makoiamya cotterallae J. Grant-Mackie, 2013 † - (CERATOMYIDAE) (FOSSIL)
- cotterensis, Hormotoma cotterensis Cullison, 1944 † - (MURCHISONIIDAE) (FOSSIL)
- cotteri, Siphonalia cotteri E.W. Vredenburg, 1923 † - (BUCCINIDAE) (FOSSIL)
- cotteri, Trachycardium cotteri Cox, 1931 † - (CARDIIDAE) (FOSSIL)
- cotteri, Eocypraea cotteri L.R. Cox, 1930 † - (EOCYPRAEIDAE) (FOSSIL)
- cotteri, Lyelliceras cotteri Spath, 1930 † - syn of: Lyelliceras lyelli (A.V.M.D. D'Orbigny, 1841 †) - (LYELLICERATIDAE) (FOSSIL)
- cotteri, Inquisitor cotteri E.W. Vredenburg, 1921 † - (PSEUDOMELATOMIDAE) (FOSSIL)
- cotteri, Macoma cotteri F.E. Eames, 1950 - (TELLINIDAE)
- cotteri, Duplicaria cotteri E.W. Vredenburg, 1921 † - (TEREBRIDAE) (FOSSIL)
- Cotteroceras, Genus Cotteroceras Ulrich & Foerste, 1936 † (PROTEROCAMEROCERATIDAE) (FOSSIL)
- cottesloensis, Globovula cottesloensis C.N. Cate, 1973 - syn of: Globovula cavanaghi (T. Iredale, 1931) - (OVULIDAE)
- Cotteswoldia, syn of: Genus Pleydellia Zieten, 1830 † (HILDOCERATIDAE) (FOSSIL)
- cotteswoldiae, Pseudogrammoceras cotteswoldiae Buckman, 1902 † - syn of: Pseudogrammoceras fallaciosum (C.É. Bayle, 1878 †) - (HILDOCERATIDAE) (FOSSIL)
- cottiana, Radix cottiana C. Pollonera, 1889 - syn of: Radix labiata (E.A. Rossmässler, 1835) - (LYMNAEIDAE)
- cottianus, Kobeltia cottianus C. Pollonera, 1889 - syn of: Arion distinctus (J.F. Mabille, 1868) - (ARIONIDAE)
- cottonense, Chondropoma biforme cottonense P. Bartsch, 1946 - (POMATIIDAE)
- cottoni, Arca cottoni Waghorn, 1926 † - (ARCIDAE) (FOSSIL)
- cottoni, Austrofusus cottoni L. C. King, 1933 † - (BUCCINIDAE) (FOSSIL)
- cottoni, Basedowena cottoni T. Iredale, 1937 - (CAMAENIDAE)
- cottoni, Alaginella cottoni F. Boyer, 2001 - (MARGINELLIDAE)
- cottoni, Modiolus areolatus cottoni C.F. Laseron, 1956 - (MYTILIDAE)
- cottoni, Sepia cottoni W. Adam, 1979 - (SEPIIDAE)
- cottoni, Dosinia cottoni J. Marwick, 1927 † - (VENERIDAE) (FOSSIL)
- Cottonia, syn of: Genus Livonia J.E. Gray, 1855 (VOLUTIDAE)
- cottreaui, Delpeya cottreaui M. Collignon, 1949 † - (DISCOHELICIDAE) (FOSSIL)
- Cottreauites, Genus Cottreauites Collignon, 1929 † (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- cottrelli, Straparollus cottrelli P.D. Montfort 1810 † - (EUOMPHALIDAE) (FOSSIL)
- cottrelli, Pseudomphalotrochus cottrelli (E.G. Linsley & E.L. Yochelson, 1973 †) - (OMPHALOTROCHIDAE) (FOSSIL)
- cotuhensis, Corbula cotuhensis Wesselingh, 2006 † - (CORBULIDAE) (FOSSIL)
- cotuhensis, Odostomia cotuhensis J.J. Van Aartsen & Wesselingh, 2000 † - (PYRAMIDELLIDAE) (FOSSIL)
- cotuiensis, Turcutheca cotuiensis (Syssoiev, 1959 †) - (CIRCOTHECIDAE) (FOSSIL)
- coturnix, Omphalotropis coturnix (J.C.H. Crosse, 1867) - (ASSIMINEIDAE)
- coturnix, Plectostylus coturnix (G.B. I Sowerby, 1832) - (BOTHRIEMBRYONTIDAE)
- coturnix, Buccinum coturnix R.W. Dunker, 1853 - syn of: Nassarius limnaeiformis (R.W. Dunker, 1847) - (BUCCINIDAE)
- coturnix, Bulimus coturnix G.B. I Sowerby, 1832 - syn of: Plectostylus coturnix (G.B. I Sowerby, 1832) - (BULIMULIDAE)
- coturnix, Nassa coturnix R.W. Dunker, 1853 - syn of: Nassarius limnaeiformis (R.W. Dunker, 1847) - (NASSARIIDAE)
- coturnix, Pteria coturnix R.W. Dunker, 1872 - syn of: Pteria maura (L.A. Reeve, 1857) - (PTERIIDAE)
- coturnix, Dolium coturnix P.F. Röding, 1798 - syn of: Tonna perdix (C. Linnaeus, 1758) - (TONNIDAE)
- coturnix, Tonna coturnix P.F. Röding, 1798 - syn of: Tonna perdix (C. Linnaeus, 1758) - (TONNIDAE)
- cotwoldensis, Naricopsina cotwoldensis Cox & Arkell † - (NARICOPSINIDAE) (FOSSIL)
- cotyledon, Circunula cotyledon (Contejean, 1859 †) - (GRYPHAEIDAE) (FOSSIL)
- cotyledon, Ostrea cotyledon Contejean, 1859 † - syn of: Circunula cotyledon (Contejean, 1859 †) - (OSTREIDAE) (FOSSIL)
- cotyledonis, Sheldonia cotyledonis (W.H. Benson, 1850) - (UROCYCLIDAE)
- Cotyorica, Genus Cotyorica Grego & Szekeres, 2017 (CLAUSILIIDAE)
- couchiana, Helix couchiana H.C. Lea, 1857 - syn of: Linisia ariadnae (L. Pfeiffer, 1848) - (HELICIDAE)
- couchiana, Amphinaias couchiana (I. Lea, 1860) - (UNIONIDAE)
- couchii, Cuthona couchii (W.P. Cocks, 1852) - (FIONIDAE)
- coucomorum, Cymbiola pulchra coucomorum (P. Bail & A. Limpus, 1998) - (VOLUTIDAE)
- coucoumi, Notadusta hungerfordi coucoumi (F.A. Schilder, 1964) - (CYPRAEIDAE)
- coudeini, Ganesella coudeini A.R.J.B. Bavay & P. Dautzenberg, 1900 - (CAMAENIDAE)
- coudeini, Oospira coudeini A.R.J.B. Bavay & P. Dautzenberg, 1899 - (CLAUSILIIDAE)
- coudeini, Juxtamusium coudeini (A.R.J.B. Bavay, 1903) - (PECTINIDAE)
- coudensis, Candidula coudensis D.T. Holyoak & G.A. Holyoak, 2010 - (HYGROMIIDAE)
- couderti, Conus couderti M. Bernardi, 1860 - syn of: Phasmoconus erythraeensis (L.A. Reeve, 1843) - (CONIDAE)
- couderti, Fusus couderti S.A.A. Petit De La Saussaye, 1853 - syn of: Afer cumingii (L.A. Reeve, 1847) - (FASCIOLARIIDAE)
- couderti, Gassiesia couderti (P. Fischer & A.C. Bernardi, 1856) - (NEOCYCLOTIDAE)
- couei, Fusinus couei (S.A.A. Petit De La Saussaye, 1853) - (FASCIOLARIIDAE)
- couffoni, Paralcidia couffoni Gérard & Contaud, 1936 † - (OPPELIIDAE) (FOSSIL)
- coulboisi, Limicolaria coulboisi J.R. Bourguignat, 1889 - (ACHATINIDAE)
- coulboisi, Physa coulboisi J.R. Bourguignat, 1888 - syn of: Bulinus truncatus coulboisi J.R. Bourguignat, 1888 - (PHYSIDAE)
- coulboisi, Bulinus coulboisi J.R. Bourguignat, 1888 - syn of: Bulinus truncatus coulboisi J.R. Bourguignat, 1888 - (PLANORBIDAE)
- coulboisi, Bulinus truncatus coulboisi J.R. Bourguignat, 1888 - (PLANORBIDAE)
- coulboisi, Unio coulboisi J.R. Bourguignat, 1886 - syn of: Coelatura horei (E.A. Smith, 1880) - (UNIONIDAE)
- Coulboisia, syn of: Genus Stanleya J.R. Bourguignat, 1885 (PALUDOMIDAE)
- coulingi, Armenoceras coulingi (A.W. Grabau †) - (ARMENOCERATIDAE) (FOSSIL)
- coulletae, Gassendiceras coulletae J.J. Bert, Delanoy & Bersac, 2006 † - (HEMIHOPLITIDAE) (FOSSIL)
- coulleti, Heteroceras coulleti Delanoy, 1995 † - (HETEROCERATIDAE) (FOSSIL)
- coulmanensis, Trophon coulmanensis E.A. Smith, 1907 - (MURICIDAE)
- coulmanensis multilamellatus, Trophon coulmanensis multilamellatus H. Numanami, 1996 - syn of: Trophon coulmanensis E.A. Smith, 1907 - (MURICIDAE)
- couloni, Ancyloceras couloni Ooster, 1860 † - syn of: Protacrioceras oosteri Sarkar, 1955 † - (ANCYLOCERATIDAE) (FOSSIL)
- couloni, Benoistia couloni (Chédeville, 1901 †) - (BRACHYTREMATIDAE) (FOSSIL)
- couloni, Exogyra couloni J.L.M. Defrance, 1821 † - (GRYPHAEIDAE) (FOSSIL)
- couloni, Helix couloni R.J. Shuttleworth, 1852 - syn of: Polygyra couloni (R.J. Shuttleworth, 1852) - (HELICIDAE)
- couloni, Polygyra couloni (R.J. Shuttleworth, 1852) - (POLYGYRIDAE)
- couloni, Pterocardia couloni Rollier, 1912 † - (PTEROCARDIIDAE) (FOSSIL)
- Couloniceras, Genus Couloniceras Busnardo, Enay & Pitre, 1966 † (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- coulsoni, Margarites coulsoni H.K. Jordan, 1895 † - (MARGARITIDAE) (FOSSIL)
- coultasi, Pseudocyclotus coultasi W.J. Clench, 1959 - (ASSIMINEIDAE)
- coulthardi, Inoceramus coulthardi McLearn, 1926 † - (INOCERAMIDAE) (FOSSIL)
- coulthardi, Rissoina coulthardi W.H. Webster, 1908 - syn of: Nozeba emarginata (F.W. Hutton, 1885) - (RISSOINIDAE)
- couperi, Venustas couperi P. Vella, 1954 - syn of: Calliostoma blacki (A.W.B. Powell, 1950) - (CALLIOSTOMATIDAE)
- couperi, Maurea couperi P. Vella, 1954 - syn of: Calliostoma blacki (A.W.B. Powell, 1950) - (CALLIOSTOMATIDAE)
- couperiana, Utterbackiana couperiana (I. Lea, 1840) - (UNIONIDAE)
- coupha, Melanopsis coupha J.R. Bourguignat, 1884 - (MELANOPSIDAE)
- coupha, Anodonta coupha G. Servain, 1887 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- courbeti, Cyclophorus courbeti C.M.F. Ancey, 1888 - (CYCLOPHORIDAE)
- courcelli, Lamellaria courcelli A. de Rochebrune & J.F. Mabille, 1891 - syn of: Lamellaria patagonica E.A. Smith, 1881 - (VELUTINIDAE)
- courquini, Oxychilus courquini J.R. Bourguignat, 1870 - (OXYCHILIDAE)
- courquiniana, Clausilia courquiniana J.R. Bourguignat, 1876 - syn of: Clausilia bidentata moniziana R.T. Lowe, 1852 - (CLAUSILIIDAE)
- courryense, Brodieia courryense (de Brun, 1929 †) - (PHYMATOCERATIDAE) (FOSSIL)
- coursisi, Turritella coursisi I. Marche-Marchad, 1959 - (TURRITELLIDAE)
- courtelaryensis, Viviparus courtelaryensis (Rollier, 1892 †) - (VIVIPARIDAE) (FOSSIL)
- courtessolei, Carcassonnella courtessolei (E.L. Yochelson, 1982 †) - (CARCASSONNELLIDAE) (FOSSIL)
- courtessolei, Gamadiscus courtessolei E.L. Yochelson, 1982 † - syn of: Carcassonnella courtessolei (E.L. Yochelson, 1982 †) - (SINUITIDAE) (FOSSIL)
- courteti, Sphaerium courteti J. Germain, 1904 - syn of: Sphaerium hartmanni C.F. Jickeli, 1874 - (SPHAERIIDAE)
- courteti marginatum, Sphaerium courteti marginatum J. Germain, 1907 - syn of: Sphaerium hartmanni C.F. Jickeli, 1874 - (SPHAERIIDAE)
- courteti unicolor, Sphaerium courteti unicolor J. Germain, 1907 - syn of: Sphaerium hartmanni C.F. Jickeli, 1874 - (SPHAERIIDAE)
- courtillerianum, Bittium courtillerianum (Millet, 1865) † - (CERITHIIDAE) (FOSSIL)
- Courtilloticeras, Genus Courtilloticeras Guex & al., 2005 † (THETIDITIDAE) (FOSSIL)
- courtownense, Allumettoceras courtownense J. Evans, 1994 † - (TRIPTEROCERATIDAE) (FOSSIL)
- cousini, Pomacea cousini (F.P. Jousseaume, 1877) - (AMPULLARIIDAE)
- cousini, Scutalus cousini (F.P. Jousseaume, 1887) - (BULIMULIDAE)
- cousini, Rhabdotus cousini F.P. Jousseaume, 1887 - syn of: Scutalus cousini (F.P. Jousseaume, 1887) - (BULIMULIDAE)
- cousini, Columbinia cousini (F.P. Jousseaume, 1900) - (CLAUSILIIDAE)
- cousini, Galba cousini (F.P. Jousseaume, 1887) - (LYMNAEIDAE)
- cousini, Lymnaea cousini F.P. Jousseaume, 1887 - syn of: Galba cousini (F.P. Jousseaume, 1887) - (LYMNAEIDAE)
- cousini, Biomphalaria cousini W.L. Paraense, 1966 - (PLANORBIDAE)
- cousini, Solaropsis gibboni cousini F.P. Jousseaume, 1887 - (PLEURODONTIDAE)
- cousini, Arhecharax cousini (F.P. Jousseaume, 1887) - (PROSERPINELLIDAE)
- cousini, Rhodea cousini F.P. Jousseaume, 1900 - (SUBULINIDAE)
- coutagnei, Thalassobia coutagnei (J.R. Bourguignat in G. Coutagne, 1881) - (COCHLIOPIDAE)
- coutagnei, Belgrandia coutagnei É.A.A. Locard, 1892 - (HYDROBIIDAE)
- coutagnei, Candidula coutagnei J.R. Bourguignat in É.A.A. Locard, 1882 - syn of: Candidula gigaxii (L. Pfeiffer, 1850) - (HYGROMIIDAE)
- coutagnei, Lymnaea coutagnei É.A.A. Locard, 1893 - syn of: Lymnaea stagnalis (C. Linnaeus, 1758) - (LYMNAEIDAE)
- coutagniana, Microcolpia coutagniana J.R. Bourguignat, 1884 - (MELANOPSIDAE)
- coutalensis, Paladilhia coutalensis H. Girardi, 2015 - (MOITESSIERIIDAE)
- couteaudi, Photinula couteaudi J.F. Mabille & A. de Rochebrune, 1885 - syn of: Photinula coerulescens (P.P. King & W.J. Broderip, 1832) - (CALLIOSTOMATIDAE)
- couteaudi, Natica couteaudi A. de Rochebrune & J.F. Mabille, 1885 - (NATICIDAE)
- couteaudi, Turritella couteaudi J.F. Mabille & A. de Rochebrune, 1889 - (TURRITELLIDAE)
- Couthouyella, Genus Couthouyella P. Bartsch, 1909 (EPITONIIDAE)
- couthouyi, Acanthochiton couthouyi A. de Rochebrune, 1889 - syn of: Hemiarthrum setulosum P.P. Carpenter in W.H. Dall, 1876 - (ACANTHOCHITONIDAE)
- couthouyi, Admete couthouyi Jay, 1839 - syn of: Admete viridula (O. Fabricius, 1780) - (CANCELLARIIDAE)
- couthouyi, Admete couthouyi J.C. Jay, 1838 - syn of: Admete viridula (O. Fabricius, 1780) - (CANCELLARIIDAE)
- couthouyi, Cavolinia couthouyi W.H. Dall, 1908 - syn of: Diacavolinia limbata (A.V.M.D. D'Orbigny, 1836) - (CAVOLINIIDAE)
- couthouyi, Trophon couthouyi H. Strebel, 1904 - syn of: Xymenopsis muriciformis (P.P. King, 1832) - (MURICIDAE)
- couthouyi, Thracia couthouyi W. Stimpson, 1851 - syn of: Thracia myopsis H.P.C. Møller, 1842 - (THRACIIDAE)
- Couthouyia, Genus Couthouyia Adams, 1860 † (PLANAXIDAE) (FOSSIL)
- Couthouyia, syn of: Genus Macromphalus S.V. Wood, 1842 (VANIKORIDAE)
- coutieri, Epitonium coutieri (F.P. Jousseaume, 1912) - (EPITONIIDAE)
- coutinhoana, Glossus coutinhoana White, 1887 † - (GLOSSIDAE) (FOSSIL)
- coutini, Cerion coutini M.I. Sánchez Roig, 1951 - (CERIONIDAE)
- coutini, Caracolus marginella coutini W.J. Clench & C.G. Aguayo, 1951 - (PLEURODONTIDAE)
- couttsi, Nozeba couttsi C.R. Laws, 1950 † - (IRAVADIIDAE) (FOSSIL)
- couttsi, Spisula couttsi J. Marwick, 1948 † - (MACTRIDAE) (FOSSIL)
- couturesi, Plekocheilus couturesi C.M.F. Ancey, 1900 - (AMPHIBULIMIDAE)
- couturieri, Plectotropis couturieri (A.R.J.B. Bavay & P. Dautzenberg, 1908) - (BRADYBAENIDAE)
- couturieri, Mauritia couturieri A.J.B.M. Vayssière, 1905 - syn of: Mauritia eglantina (P.L. Duclos, 1833) - (CYPRAEIDAE)
- couturieri, Epitonium couturieri (M.E.A. de Boury, 1912) - (EPITONIIDAE)
- couturieri, Theba couturieri J.R. Bourguignat - syn of: Theba pisana (O.F. Müller, 1774) - (HELICIDAE)
- couturieri, Babelomurex couturieri (F.P. Jousseaume, 1898) - (MURICIDAE)
- couturieri, Clanculus couturieri B.C.M. Payraudeau, 1826 - syn of: Clanculus corallinus (J.F. Gmelin, 1791) - (TROCHIDAE)
- couturii, Clanculus couturii B.C.M. Payraudeau, 1826 - syn of: Clanculus corallinus (J.F. Gmelin, 1791) - (TROCHIDAE)
- couvaensis, Lithoconus couvaensis E.H. Vokes, 1938 † - (CONIDAE) (FOSSIL)
- couvaensis, Tellina couvaensis E.H. Vokes, 1938 † - (TELLINIDAE) (FOSSIL)
- couvana, Cancellaria couvana E.H. Vokes, 1938 † - syn of: Euclia montserratensis C.J. Maury, 1925 † - (CANCELLARIIDAE) (FOSSIL)
- couvana, Gastrochaena couvana E.H. Vokes, 1938 † - (GASTROCHAENIDAE) (FOSSIL)
- couvana, Oliva couvana C.J. Maury, 1925 † - (OLIVIDAE) (FOSSIL)
- couvensis, Subcancilla couvensis (C.J. Maury, 1925 †) - (MITRIDAE) (FOSSIL)
- couveti, Lamelliphorus couveti (Pictet & Renevier, 1854 †) - (LAMELLIPHORIDAE) (FOSSIL)
- couveti, Trochus couveti Pictet & Renevier, 1854 † - syn of: Lamelliphorus couveti (Pictet & Renevier, 1854 †) - (TROCHIDAE) (FOSSIL)
- couviana, Marginella couviana C.J. Maury, 1925 † - syn of: Persicula propeobesa W.C. Mansfield, 1925 † - (MARGINELLIDAE) (FOSSIL)
- couviana stenygra, Marginella couviana stenygra W.P. Woodring, 1970 - syn of: Persicula propeobesa stenygra W.P. Woodring, 1970 - (MARGINELLIDAE)
- couvrili, Acrosterigma couvrili E. Fischer-Piette, 1977 - syn of: Acrosterigma impolitum (G.B. II Sowerby, 1841) - (CARDIIDAE)
- covacevichi, Otukaia covacevichi C. Nielsen & al., 2004 † - (CALLIOSTOMATIDAE) (FOSSIL)
- covacevichi, Limatula covacevichi D. Frassinetti, 1997 † - (LIMIDAE) (FOSSIL)
- covacevichi, Trachyteuthis covacevichi A. Fuchs, 2008 † - (TRACHYTEUTHIDIDAE) (FOSSIL)
- covadongae, Pyrenaearia cantabrica covadongae A. Ortiz De Zárate, 1956 - (HYGROMIIDAE)
- covani, Ampelita covani (E.A. Smith, 1879) - (ACAVIDAE)
- covani, Rhytida covani (E.A. Smith, 1879) - (RHYTIDIDAE)
- covatshevici, Ancyloceras covatshevici Dimitrova, 1967 † - (ANCYLOCERATIDAE) (FOSSIL)
- covepointensis, Turrifulgur covepointensis E.J. Petuch, 2004 † - (BUSYCONIDAE) (FOSSIL)
- covepointensis, Chesapecten covepointensis Ward, 1992 † - (PECTINIDAE) (FOSSIL)
- covepointensis, Mariacolpus covepointensis E.J. Petuch, 2004 † - (TURRITELLIDAE) (FOSSIL)
- covingtonense, Orthonybyoceras covingtonense Foerste & Teichert, 1930 † - syn of: Orthonybyoceras dyeri (Miller, 1875 †) - (PROTEOCERATIDAE) (FOSSIL)
- covra, Nucula covra W. Bergmans, 1978 - (NUCULIDAE)
- covuncoensis, Levytrigonia covuncoensis (A. Lambert, 1944 †) - (IOTRIGONIIDAE) (FOSSIL)
- covunquensis, Holcoptychites covunquensis Windhausen, 1931 † - syn of: Holcoptychites recopei J.H.F. Douvillé, 1910 † - (NEOCOMITIDAE) (FOSSIL)
- covurluensis, Melanopsis covurluensis Cobalcescu, 1883 † - (MELANOPSIDAE) (FOSSIL)
- cowani, Cocculina cowani J.H. McLean, 1987 - (COCCULINIDAE)
- cowani, Cuspidaria cowani F.R. Bernard, 1967 - (CUSPIDARIIDAE)
- cowani, Tripoplax cowani K.B. Clark, 2008 - (ISCHNOCHITONIDAE)
- cowapi, Leptomicroceras cowapi M. Edmunds & al., 2016 † - (EODEROCERATIDAE) (FOSSIL)
- Cowboyiceras, Genus Cowboyiceras Guex & al., 2005 † (DINARITIDAE) (FOSSIL)
- cowdalense, Girtyoceras cowdalense Moore, 1946 † - (GIRTYOCERATIDAE) (FOSSIL)
- cowei, Horologica cowei B.A. Marshall, 1978 - (CERITHIOPSIDAE)
- cowei, Conominolia cowei A.G. Beu, 1969 † - (TROCHIDAE) (FOSSIL)
- coweorum, Bathytoma coweorum A.G. Beu, 1970 † - (BORSONIIDAE) (FOSSIL)
- cowichanensis, Cycloceltites cowichanensis Tozer, 1994 † - (CYCLOCELTITIDAE) (FOSSIL)
- cowickeensis, Exechocirsus cowickeensis N.F. Sohl, 1964 † - (CERITHIIDAE) (FOSSIL)
- cowickeensis, Tympanotonos cowickeensis H.C.F. Schumacher, 1817 † - (POTAMIDIDAE) (FOSSIL)
- cowiei, Kleokyphus cowiei A.F. Sartori, O. Gargominy & Fontaine, 2014 - (ENDODONTIDAE)
- cowlesi, Turbonilla cowlesi A.M. Strong & L.G. Hertlein, 1939 - (PYRAMIDELLIDAE)
- cowlingense, Cravenoceras cowlingense Librovitch, 1938 † - syn of: Cravenoceras petrenkoi Librovitch, 1938 † - (CRAVENOCERATIDAE) (FOSSIL)
- cowlitzensis, Conus cowlitzensis Weaver, 1912 † - (CONIDAE) (FOSSIL)
- cowlitzensis, Ficopsis cowlitzensis (C.S. Weaver, 1943 †) - (FICIDAE) (FOSSIL)
- cowlitzensis, Modiolus cowlitzensis (C.S. Weaver & K.V.W. Palmer, 1922 †) - (MYTILIDAE) (FOSSIL)
- cowlitzensis, Nerita cowlitzensis R.E. Dickerson, 1915 † - syn of: Theliostyla triangulata W.M. Gabb, 1869 † - (NERITIDAE) (FOSSIL)
- cowlitzensis, Nuculana cowlitzensis C.S. Weaver & K.V.W. Palmer, 1922 † - (NUCULANIDAE) (FOSSIL)
- Cowlitzia, Genus Cowlitzia Hanna, 1927 † (RIMELLIDAE) (FOSSIL)
- cowlitziana, Nucleolaria cowlitziana Groves, 1994 † - (CYPRAEIDAE) (FOSSIL)
- cowliztensis, Eocantharus cowliztensis B.L. Clark, 1938 † - (BUCCINIDAE) (FOSSIL)
- Cowperesia, Genus Cowperesia Mendes , 1952 † (MEGADESMIDAE) (FOSSIL)
- cowperi, Parvamussium cowperi (Waring, 1917 †) - (PROPEAMUSSIIDAE) (FOSSIL)
- cowperi yubarensis, Parvamussium cowperi yubarensis Yabe & T. Nagao, 1928 † - (PROPEAMUSSIIDAE) (FOSSIL)
- Cowtoniceras, Genus Cowtoniceras † (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- Cowwarrella, syn of: Subgenus Platyceras (Visitator) Perner, 1911 † (PLATYCERATIDAE) (FOSSIL)
- coxa, Crassinella coxa A.A. Olsson, 1964 - (CRASSATELLIDAE)
- coxanus, Aviculopecten coxanus F.B. Meek & A.H. Worthen, 1860 † - (AVICULOPECTINIDAE) (FOSSIL)
- coxei, Ostrea coxei Author unknown † - (OSTREIDAE) (FOSSIL)
- coxeirana, Cochlogena coxeirana S. Moricand, 1836 - syn of: Leiostracus coxeiranus (S. Moricand, 1836) - (HELICIDAE)
- coxeiranus, Leiostracus coxeiranus (S. Moricand, 1836) - (SIMPULOPSIDAE)
- coxeiranus disona, Leiostracus coxeiranus disona (S. Moricand, 1836) - (SIMPULOPSIDAE)
- coxeiranus nigrescens, Leiostracus coxeiranus nigrescens (S. Moricand, 1836) - (SIMPULOPSIDAE)
- coxeiranus purpurascens, Leiostracus coxeiranus purpurascens (S. Moricand, 1836) - (SIMPULOPSIDAE)
- coxeiranus trizona, Leiostracus coxeiranus trizona (S. Moricand, 1836) - (SIMPULOPSIDAE)
- coxeiranus unicolor, Leiostracus coxeiranus unicolor (S. Moricand, 1836) - (SIMPULOPSIDAE)
- coxeiranus vittatoezonata, Leiostracus coxeiranus vittatoezonata (S. Moricand, 1836) - (SIMPULOPSIDAE)
- coxenae, Hadra coxenae J.W. Brazier, 1875 - syn of: Spurlingia dunkiensis (E. Forbes, 1851) - (CAMAENIDAE)
- coxeni, Gloreugenia coxeni (J.C. Cox, 1871) - (CAMAENIDAE)
- coxeni, Conus coxeni J.W. Brazier, 1875 - syn of: Austroconus cyanostoma (A. Adams, 1855) - (CONIDAE)
- coxeni, Eclogavena coxeni (J.C. Cox, 1873) - (CYPRAEIDAE)
- coxeni, Cypraea coxeni J.C. Cox, 1873 - syn of: Eclogavena coxeni (J.C. Cox, 1873) - (CYPRAEIDAE)
- coxeni, Palaeohelicina coxeni (J.W. Brazier, 1876) - (HELICINIDAE)
- coxeni, Pupina coxeni J.W. Brazier, 1876 - (PUPINIDAE)
- coxeni, Myxastyla coxeni (H.G. Richards, 1938) - (SPIRAXIDAE)
- coxeni, Pitar coxeni (E.A. Smith, 1884) - (VENERIDAE)
- coxeni hesperina, Eclogavena coxeni hesperina (F.A. Schilder & R.H. Summers, 1963) - (CYPRAEIDAE)
- Coxesia, Genus Coxesia Mendes, 1952 † (MYTILIDA (UNASSIGNED)) (FOSSIL)
- coxi, Acanthochitona coxi (H.A. Pilsbry, 1894) - (ACANTHOCHITONIDAE)
- coxi, Acanthochites coxi H.A. Pilsbry, 1894 - syn of: Acanthochitona coxi (H.A. Pilsbry, 1894) - (ACANTHOCHITONIDAE)
- coxi, Globularia coxi Stefanini, 1939 † - (AMPULLINIDAE) (FOSSIL)
- coxi, Arca coxi A. Dey, 1961 † - (ARCIDAE) (FOSSIL)
- coxi, Astarte coxi Jaboli, 1959 † - (ASTARTIDAE) (FOSSIL)
- coxi, Aturia coxi Miller, 1947 † - (ATURIIDAE) (FOSSIL)
- coxi, Caecum coxi L. de Folin, 1869 - syn of: Meioceras nitidum (W. Stimpson, 1851) - (CAECIDAE)
- coxi, Thersites coxi J.C.H. Crosse, 1866 - (CAMAENIDAE)
- coxi, Tritonoharpa coxi (J.W. Brazier, 1872) - (CANCELLARIIDAE)
- coxi, Sinodiopsis coxi Eames 1957 † - (CARDIIDA (UNASSIGNED)) (FOSSIL)
- coxi, Maoricardium coxi (J. Hector, 1886 †) - (CARDIIDAE) (FOSSIL)
- coxi, Pteromya coxi S. Freneix & Cubaynes, 1984 † - (CERATOMYIDAE) (FOSSIL)
- coxi, Colina coxi Abbass, 1967 † - (CERITHIIDAE) (FOSSIL)
- coxi, Chiton coxi (H.A. Pilsbry, 1894) - (CHITONIDAE)
- coxi, Rhyssoplax coxi H.A. Pilsbry, 1894 - syn of: Chiton coxi (H.A. Pilsbry, 1894) - (CHITONIDAE)
- coxi, Notocorbula coxi † - (CORBULIDAE) (FOSSIL)
- coxi, Corbula smithiana coxi (H.A. Pilsbry, 1897) - (CORBULIDAE)
- coxi, Erronea errones coxi J.W. Brazier, 1872 - (CYPRAEIDAE)
- coxi, Corbicula coxi H.A. Pilsbry, 1897 - (CYRENIDAE)
- coxi, Palaina coxi A. Adams, 1868 - (DIPLOMMATINIDAE)
- coxi, Drillia coxi G.F. Angas, 1867 - syn of: Vexitomina coxi (G.F. Angas, 1867) - (DRILLIIDAE)
- coxi, Hypermastus coxi (H.A. Pilsbry, 1899) - (EULIMIDAE)
- coxi, Peristernia coxi A. Dey, 1961 † - (FASCIOLARIIDAE) (FOSSIL)
- coxi, Oniscidia coxi C.T. Trechmann, 1935 † - (HARPIDAE) (FOSSIL)
- coxi, Vexitomina coxi (G.F. Angas, 1867) - (HORAICLAVIDAE)
- coxi, Stegochiton coxi Hoare & Smith, 1984 † - (LEPTOCHITONIDAE) (FOSSIL)
- coxi, Agathotoma coxi (W.G. Fargo, 1953) - (MANGELIIDAE)
- coxi, Mesoginella coxi (J. Marwick, 1928 †) - (MARGINELLIDAE) (FOSSIL)
- coxi, Mathilda coxi Abbass, 1962 † - (MATHILDIDAE) (FOSSIL)
- coxi, Mitra coxi (N.H. Ludbrook, 1958 †) - (MITRIDAE) (FOSSIL)
- coxi, Natica coxi Mukerjee, 1939 † - (NATICIDAE) (FOSSIL)
- coxi, Partula coxi W.D. Hartman, 1885 - (PARTULIDAE)
- coxi, Indoweyla coxi Fursich & Heinze in Jaitly & al. 1995 † - (PECTINIDAE) (FOSSIL)
- coxi, Lentipecten corneus coxi M. Glibert & Poel, 1965 † - (PECTINIDAE) (FOSSIL)
- coxi, Humphreyia coxi J.W. Brazier, 1872 - syn of: Humphreyia strangei (C.B. Adams, 1854) - (PENICILLIDAE)
- coxi, Oretia coxi J. Marwick, 1953 † - (PERGAMIDIIDAE) (FOSSIL)
- coxi, Inquisitor coxi G.F. Angas, 1867 - syn of: Vexitomina coxi (G.F. Angas, 1867) - (PSEUDOMELATOMIDAE)
- coxi, Odostomia coxi P. Bartsch, 1955 † - (PYRAMIDELLIDAE) (FOSSIL)
- coxi, Triton coxi J.W. Brazier, 1872 - syn of: Tritonoharpa coxi (J.W. Brazier, 1872) - (RANELLIDAE)
- coxi, Terebra coxi A. Dey, 1961 † - (TEREBRIDAE) (FOSSIL)
- coxi, Kupenga coxi (Fleming, 1985) † - (TRIGONIIDAE) (FOSSIL)
- coxi, Notogibbula coxi G.F. Angas, 1867 - syn of: Notogibbula bicarinata (A. Adams, 1854) - (TROCHIDAE)
- coxi, Trochonema coxi Wilson, 1938 † - (TROCHONEMATIDAE) (FOSSIL)
- coxi, Pseudaulicina coxi D. Merle & J.M. Pacaud, 2014 † - (VOLUTIDAE) (FOSSIL)
- Coxia, Genus Coxia C.M.F. Ancey, 1887 (TROCHOMORPHIDAE)
- coxiana, Papuina coxiana G.F. Angas, 1867 - (CAMAENIDAE)
- coxianus, Conus coxianus G.B. III Sowerby, 1895 - syn of: Leptoconus locumtenens (J.F. Blumenbach, 1791) - (CONIDAE)
- Coxiconcha, syn of: Genus Coxiconchia Babin, 1966 † (COXICONCHIIDAE) (FOSSIL)
- Coxiconchia, Genus Coxiconchia Babin, 1966 † (COXICONCHIIDAE) (FOSSIL)
- COXICONCHIIDAE Babin, 1977 † - Family (BIVALVIA-HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-BABINKOIDEA [Superfamily]) (FOSSIL)
- Coxiela, syn of: Genus Coxiella E.A. Smith, 1894 (POMATIOPSIDAE)
- coxiella, Gervillancea coxiella Skwarko, 1967 † - (BAKEVELLIIDAE) (FOSSIL)
- Coxiella, Genus Coxiella E.A. Smith, 1894 (POMATIOPSIDAE)
- Coxielladda, syn of: Genus Coxiella E.A. Smith, 1894 (POMATIOPSIDAE)
- coxii, Carditopsis coxii (F.E. Eames & G.L. Wilkins, 1957) - (CONDYLOCARDIIDAE)
- Coxitrigonia, Genus Coxitrigonia Cooper, 2016 † (TRIGONIIDAE) (FOSSIL)
- coxonus, Aviculopecten coxonus F.B. Meek, 1872 † - syn of: Euchondria neglecta (H.B. Geinitz, 1866 †) - (AVICULOPECTINIDAE) (FOSSIL)
- coyensis, Actinonaias coyensis (H.A. Pilsbry, 1910) - (UNIONIDAE)
- coyi, Intelcystiscus coyi J. Espinosa & J.A. Ortea, 2002 - (CYSTISCIDAE)
- Coyote, Subgenus Helminthoglypta (Coyote) D.M. Reeder & B. Roth, 1988 (HELMINTHOGLYPTIDAE)
- coyotense, Bradyia coyotense (Bucher, 1992 †) - (ACROCHORDICERATIDAE) (FOSSIL)
- coyotensis, Turbonilla coyotensis F.C. Baker, G.D. Hanna & A.M. Strong, 1928 - (PYRAMIDELLIDAE)
- coysmani, Eulimella coysmani A. Peñas, E. Rolán & F. Swinnen, 2014 - (PYRAMIDELLIDAE)
- cozumelense, Choanopoma cozumelense H.G. Richards, 1937 - syn of: Choanopomops andrewsae (C.M.F. Ancey, 1886) - (POMATIIDAE)
- cozumelensis, Mesembrinus cozumelensis (H.G. Richards, 1936) - (BULIMULIDAE)
- craccoi, Cochlis craccoi E. Robba, Pedriali & E. Quaggiotto, 2016 † - (NATICIDAE) (FOSSIL)
- cracens, Socienna cracens B.A. Marshall, 1979 - (CERITHIOPSIDAE)
- cracens, Conus cracens R.C. Hoerle, 1976 † - syn of: Conus sauridens T.A. Conrad, 1833 † - (CONIDAE) (FOSSIL)
- cracens, Mesoginella cracens (R.K. Dell, 1956) - (MARGINELLIDAE)
- cracens, Siratus cracens R. Houart, 2014 - (MURICIDAE)
- cracens, Leptopecten cracens Olsson 1964 † - (PECTINIDAE) (FOSSIL)
- cracens, Homoceratoides cracens W.J. Gordon, 1964 † - (RAMOSITIDAE) (FOSSIL)
- cracens regia, Socienna cracens regia (B.A. Marshall, 1979) - (CERITHIOPSIDAE)
- cracens regia, Synthopsis cracens regia B.A. Marshall, 1979 - syn of: Socienna cracens regia (B.A. Marshall, 1979) - (CERITHIOPSIDAE)
- cracenta, Cymbiola cracenta (D.F. McMichael, 1963) - (VOLUTIDAE)
- cracentis, Bostryx cracentis A.S.H. Breure, 1978 - (BULIMULIDAE)
- cracentis, Favartia cracentis (R. Houart, 1996) - (MURICIDAE)
- cracherodi, Haliotis cracherodi W.E. Leach, 1814 - (HALIOTIDAE)
- cracherodi, Haliotis cracherodi W.E. Leach, 1814 - syn of: Haliotis cracherodi W.E. Leach, 1814 - (HALIOTIDAE)
- cracherodi, Murex cracherodi G.B. III Sowerby, 1879 - syn of: Vokesimurex rubidus (F.C. Baker, 1897) - (MURICIDAE)
- cracherodi californiensis, Haliotis cracherodi californiensis W.J. Swainson, 1822 - (HALIOTIDAE)
- cracherodi rosea, Haliotis cracherodi rosea C.R. Orcutt, 1900 - (HALIOTIDAE)
- crachrodii, Circe crachrodii J.E. Gray, 1838 - syn of: Circenita callipyga (I. von Born, 1778) - (VENERIDAE)
- cracilenta, Terebra cracilenta C.C. Li, 1930 - syn of: Pristiterebra tuberculosa (R.B. Hinds, 1844) - (TEREBRIDAE)
- cradalli, Physa cradalli F.C. Baker, 1906 - syn of: Haitia mexicana (R.A. Philippi, 1841) - (PHYSIDAE)
- craddocki, Apoptopegma craddocki Webers & al., 1992 † - (RIBEIRIIDAE) (FOSSIL)
- Craftonoceras, Genus Craftonoceras F.B. Meek & A.H. Worthen † (TARPHYCERIDA (UNASSIGNED)) (FOSSIL)
- cragini, Calliostoma cragini Stanton, 1947 † - (CALLIOSTOMATIDAE) (FOSSIL)
- cragini, Apiotrigonia cragini (Stoyanow 1949) † - (MEGATRIGONIIDAE) (FOSSIL)
- cragini, Euspira cragini Stanton, 1947 † - (NATICIDAE) (FOSSIL)
- cragini, Triodopsis cragini R.E. Call, 1886 - (POLYGYRIDAE)
- cragini, Trigonia cragini Stoyanow, 1949 † - (TRIGONIIDAE) (FOSSIL)
- Craginia, Genus Craginia Stephenson, 1952 † (TURRITELLIDAE) (FOSSIL)
- Craginites, Genus Craginites Young, 1957 † (BRANCOCERATIDAE) (FOSSIL)
- craigensis, Cyrtolites craigensis Reed, 1921 † - (CYRTOLITIDAE) (FOSSIL)
- craigensis, Limatula craigensis C.A. Fleming, 1955 † - (LIMIDAE) (FOSSIL)
- craigensis, Tetranota craigensis Reed, 1921 † - (PLECTONOTIDAE) (FOSSIL)
- craigensis, Tetranota carrickensis craigensis Reed, 1921 † - (PLECTONOTIDAE) (FOSSIL)
- craigi, Holopea craigi Rohr & al. 2008 † - (HOLOPEIDAE) (FOSSIL)
- craigsmithi, Cocculina craigsmithi J.H. McLean, 1992 - (COCCULINIDAE)
- craiovensis, Viviparus craiovensis (J.R. Tournouër, 1880 †) - (VIVIPARIDAE) (FOSSIL)
- crakei, Duplicaria crakei (R.D. Burch, 1965) - (TEREBRIDAE)
- Cralopa, Genus Cralopa T. Iredale, 1941 (CHAROPIDAE)
- cramatensis, Turritella cramatensis Martin, 1905 † - (TURRITELLIDAE) (FOSSIL)
- cramei, Parainoceramya cramei (Clausen & Wignall, 1990 †) - (INOCERAMIDAE) (FOSSIL)
- cramensis, Dimitocamax cramensis Doyle, 1990 † - (DIMITOBELIDAE) (FOSSIL)
- cramptoni, Abyssomelania cramptoni A. Kaim & al., 2014 † - (MELANODRYMIIDAE) (FOSSIL)
- cramptoni, Samoana cramptoni H.A. Pilsbry & C.M. Cooke, 1934 - (PARTULIDAE)
- cramptoni, Partula cramptoni W.J. Clench, 1941 - (PARTULIDAE)
- cranaos, Bathytoma cranaos N. Puillandre, A.V. Sysoev & al., 2010 - (BORSONIIDAE)
- Cranatula, syn of: Genus Crenatula J.B.P.A. Lamarck, 1803 (PTERIIDAE)
- cranchi, Trochus cranchi W.E. Leach, 1852 - syn of: Calliostoma zizyphinum (C. Linnaeus, 1758) - (TROCHIDAE)
- Cranchia, Genus Cranchia W.E. Leach, 1817 (CRANCHIIDAE)
- cranchiana, Raphitoma cranchiana J.E. Gray, 1852 - syn of: Raphitoma linearis (G. Montagu, 1803) - (RAPHITOMIDAE)
- cranchianus, Callochiton cranchianus W.E. Leach, 1852 - syn of: Callochiton septemvalvis (G. Montagu, 1803) - (CALLOCHITONIDAE)
- cranchianus, Chiton cranchianus W.E. Leach, 1852 - syn of: Callochiton septemvalvis (G. Montagu, 1803) - (CHITONIDAE)
- cranchii, Bulla cranchii J. Fleming, 1828 - syn of: Roxania utriculus (G.B. Brocchi, 1814) - (BULLIDAE)
- cranchii, Bellaspira cranchii T. Brown, 1827 - syn of: Propebela rufa (G. Montagu, 1803) - (DRILLIIDAE)
- cranchii, Fusus cranchii T. Brown, 1827 - syn of: Propebela rufa (G. Montagu, 1803) - (FASCIOLARIIDAE)
- cranchii, Ocythoe cranchii W.E. Leach, 1817 - syn of: Argonauta hians J. Lightfoot, 1786 - (OCYTHOIDAE)
- cranchii, Roxania cranchii J. Fleming, 1828 - syn of: Roxania utriculus (G.B. Brocchi, 1814) - (SCAPHANDRIDAE)
- CRANCHIIDAE Prosch, 1849 - Family (CEPHALOPODA-COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order])
- crandalli, Cunearca crandalli C.J. Maury, 1924 † - (ARCIDAE) (FOSSIL)
- crandalli, Kaliella crandalli K.C. Emberton, 2010 - (CHRONIDAE)
- crandalli, Elimia potosiensis crandalli H.A. Pilsbry, 1890 - (PLEUROCERIDAE)
- crandalli, Tylostoma crandalli C.J. Maury, 1924 † - (TYLOSTOMATIDAE) (FOSSIL)
- craneana, Calliclava craneana (L.G. Hertlein & A.M. Strong, 1951) - (DRILLIIDAE)
- craneana, Semele craneana L.G. Hertlein & A.M. Strong, 1949 - (SEMELIDAE)
- cranioides, Hipponix cranioides P.P. Carpenter, 1864 - syn of: Hipponix cranoides P.P. Carpenter, 1864 - (HIPPONICIDAE)
- Craniopsis, syn of: Genus Cranopsis A. Adams, 1860 (FISSURELLIDAE)
- cranmerorum, Mirapecten cranmerorum (T.R. Waller, 1986) - (PECTINIDAE)
- Cranocephalites, Subgenus Arctocephalites (Cranocephalites) Imlay, 1962 † (CADOCERATIDAE) (FOSSIL)
- Cranoceras, Genus Cranoceras Hyatt, 1884 † (NAUTILIDA (UNASSIGNED)) (FOSSIL)
- cranoideformis, Clymenia cranoideformis Kolotukhina † - (CLYMENIIDAE) (FOSSIL)
- cranoides, Clymenia cranoides (C.N. Lange, 1929 †) - (CLYMENIIDAE) (FOSSIL)
- cranoides, Orthoclymenia cranoides C.N. Lange, 1929 † - syn of: Clymenia cranoides (C.N. Lange, 1929 †) - (CLYMENIIDAE) (FOSSIL)
- cranoides, Hipponix cranoides P.P. Carpenter, 1864 - (HIPPONICIDAE)
- Cranopsis, Genus Cranopsis A. Adams, 1860 (FISSURELLIDAE)
- crapulus, Unio crapulus I. Lea, 1861 - syn of: Pleurobema fibuloides (I. Lea, 1859) - (UNIONIDAE)
- crashleyi, Scapharca crashleyi C.J. Maury, 1924 † - (ARCIDAE) (FOSSIL)
- crashleyi, Glycymeris crashleyi C.J. Maury, 1924 † - (GLYCYMERIDIDAE) (FOSSIL)
- crasova, Jurilda crasova J. Gründel, 1973 † - syn of: Jurilda concava (Walther, 1951 †) - (MATHILDIDAE) (FOSSIL)
- Craspedaria, Subgenus Geomitra (Craspedaria) R.T. Lowe, 1852 (HYGROMIIDAE)
- Craspedites, Genus Craspedites Pavlov, 1892 † (POLYPTYCHITIDAE) (FOSSIL)
- CRASPEDITIDAE - syn of Family: POLYPTYCHITIDAE (FOSSIL)
- craspeditiformis, Khetoceras craspeditiformis Rogov, 2014 † - (POLYPTYCHITIDAE) (FOSSIL)
- craspedocheila, Euhadra craspedocheila (A. Adams, 1868) - (BRADYBAENIDAE)
- Craspedochilus, syn of: Genus Lepidochitona J.E. Gray, 1821 (LEPIDOCHITONIDAE)
- Craspedochiton, Genus Craspedochiton R.J. Shuttleworth, 1853 (ACANTHOCHITONIDAE)
- Craspedodiscus, Genus Craspedodiscus C.G. Ehrenberg, 1844 † (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- Craspedodonta, syn of: Genus Cristaria H.C.F. Schumacher, 1817 (UNIONIDAE)
- craspedonia, Chione craspedonia (W.H. Dall, 1903 †) - (VENERIDAE) (FOSSIL)
- Craspedoplax, Genus Craspedoplax T. Iredale & A.F.B. Hull, 1925 (ACANTHOCHITONIDAE)
- Craspedopoma, Genus Craspedopoma L. Pfeiffer, 1847 (CRASPEDOPOMATIDAE)
- CRASPEDOPOMATIDAE Kobelt & Möllendorff, 1898 - Family (GASTROPODA-CAENOGASTROPODA [Subclass]-ARCHITAENIOGLOSSA [Order]-CYCLOPHOROIDEA [Superfamily])
- Craspedostoma, Genus Craspedostoma Lindström, 1884 † (CRASPEDOSTOMATIDAE) (FOSSIL)
- CRASPEDOSTOMATIDAE Wenz, 1938 † - Family (GASTROPODA-NERITIMORPHA [Subclass]) (FOSSIL)
- craspedota, Spisula craspedota Gardner, 1947 † - (MACTRIDAE) (FOSSIL)
- Craspedotriton, syn of: Genus Phyllocoma C.M. Tapparone-Canefri, 1881 (MURICIDAE)
- Craspedotropis, Genus Craspedotropis W.T. Blanford, 1864 (CYCLOPHORIDAE)
- craspedotum, Columbarium craspedotum (R. Tate, 1888 †) - (TURBINELLIDAE) (FOSSIL)
- craspedotus, Serratifusus craspedotus (R. Tate, 1888 †) - (BUCCINIDAE) (FOSSIL)
- Craspedotus, syn of: Genus Danilia Š. Brusina, 1865 (CHILODONTIDAE)
- craspedotus, Fusus craspedotus R. Tate, 1888 † - syn of: Serratifusus craspedotus (R. Tate, 1888 †) - (FASCIOLARIIDAE) (FOSSIL)
- crassa, Partulina crassa (W. Newcomb, 1853) - (ACHATINELLIDAE)
- crassa, Aldanella crassa Rozanov & al., 1969 † - syn of: Aldanella attleborensis (Shaler & Foerste, 1888 †) - (ALDANELLIDAE) (FOSSIL)
- crassa, Mytilarca crassa Isberg, 1934 † - (AMBONYCHIIDAE) (FOSSIL)
- crassa, Alexandromenia crassa N.H. Odhner, 1921 - (AMPHIMENIIDAE)
- crassa, Asolene crassa (W.J. Swainson, 1823) - (AMPULLARIIDAE)
- crassa, Ancilla crassa G.B. II Sowerby, 1859 - syn of: Ancilla eburnea (G.P. Deshayes, 1830) - (ANCILLARIIDAE)
- crassa, Aporrhais crassa É.A.A. Locard, 1890 - syn of: Aporrhais serresianus (A. Michaud, 1828) - (APORRHAIDAE)
- crassa, Astarte crassa W. Leche, 1878 - (ASTARTIDAE)
- crassa, Dimeroclymenia crassa (Pajchlowa, 1972 †) - (BILOCLYMENIIDAE) (FOSSIL)
- crassa, Megalomphala crassa (E.F.R.K. Koken, 1896 †) - (BUCANIIDAE) (FOSSIL)
- crassa, Bucania crassa Ulrich & Scofield, 1897 † - (BUCANIIDAE) (FOSSIL)
- crassa, Buccinopsis crassa B. Wade, 1917 † - (BUCCINIDAE) (FOSSIL)
- crassa, Bursa crassa L.W. Dillwyn, 1817 - syn of: Marsupina bufo (J.G. Bruguière, 1792) - (BURSIDAE)
- crassa, Calyptraea crassa R. Tate, 1893 † - (CALYPTRAEIDAE) (FOSSIL)
- crassa, Cardita crassa J.B.P.A. Lamarck, 1819 † - (CARDITIDAE) (FOSSIL)
- crassa, Cardites crassa G.B. Sowerby, 1839 - syn of: Cardites grayi (W.H. Dall, 1903) - (CARDITIDAE)
- crassa, Semicassis crassa T.A. de M. Monterosato, 1878 - syn of: Semicassis granulata undulata (J.F. Gmelin, 1791) - (CASSIDAE)
- crassa, Diacria erythra crassa S. Van Der Spoel, 1971 - (CAVOLINIIDAE)
- crassa, Strophiops crassa C.J. Maynard & W.F. Clapp, 1920 - syn of: Cerion eleutherae H.A. Pilsbry & E.G. Vanatta, 1896 - (CERIONIDAE)
- crassa, Prolixodens crassa B.A. Marshall, 1978 - (CERITHIOPSIDAE)
- crassa, Socienna crassa (C.F. Laseron, 1951) - (CERITHIOPSIDAE)
- crassa, Turrella crassa C.F. Laseron, 1954 - (CLATHURELLIDAE)
- crassa, Montenegrina perstriata crassa Z. Eröss & M. Szekeres, 1999 - (CLAUSILIIDAE)
- crassa, Littoridina crassa Etheridge, 1879 † - (COCHLIOPIDAE) (FOSSIL)
- crassa, Coelostylina crassa (Münster, 1841 †) - (COELOSTYLINIDAE) (FOSSIL)
- crassa, Serracorbula crassa (R.B. Hinds, 1843 †) - (CORBULIDAE) (FOSSIL)
- crassa, Corbula crassa L.A. Reeve, 1843 - (CORBULIDAE)
- crassa, Nodicostellaria crassa (L.R.L. Simone, 1995) - (COSTELLARIIDAE)
- crassa, Cuspidaria crassa T.A. de M. Monterosato, 1880 - syn of: Cuspidaria cuspidata (A.G. Olivi, 1792) - (CUSPIDARIIDAE)
- crassa, Modiolarca crassa A. de Rochebrune & J.F. Mabille, 1889 - syn of: Gaimardia trapesina (J.B.P.A. Lamarck, 1819) - (CYAMIIDAE)
- crassa, Lyncina carneola crassa (J.F. Gmelin, 1791) - (CYPRAEIDAE)
- crassa, Corbicula crassa G.P. Deshayes, 1825 † - (CYRENIDAE) (FOSSIL)
- crassa, Cyrtoclymenia crassa Petter, 1960 † - syn of: Protactoclymenia enkebergensis crassa Petter, 1960 † - (CYRTOCLYMENIIDAE) (FOSSIL)
- crassa, Protactoclymenia enkebergensis crassa Petter, 1960 † - (CYRTOCLYMENIIDAE) (FOSSIL)
- crassa, Vanuxemia crassa Ulrich, 1894 † - (CYRTODONTIDAE) (FOSSIL)
- crassa, Warburgia crassa Isberg, 1934 † - (CYRTODONTIDAE) (FOSSIL)
- crassa, Gibberula crassa T. McCleery, 2009 - (CYSTISCIDAE)
- crassa, Anguispira crassa B. Walker, 1928 - (DISCIDAE)
- crassa, Neodrillia crassa P.J. Fallon, 2016 - (DRILLIIDAE)
- crassa, Clavus crassa E.A. Smith, 1888 - syn of: Clavus aglaia (W.H. Dall, 1918) - (DRILLIIDAE)
- crassa, Edmondia crassa Girty, 1911 † - (EDMONDIIDAE) (FOSSIL)
- crassa, Eopteria crassa Thoral, 1935 † - (EOPTERIIDAE) (FOSSIL)
- crassa, Euciroa crassa K.H.J. Thiele & S.G.A. Jaeckel, 1931 - (EUCIROIDAE)
- crassa, Fissurella crassa J.B.P.A. Lamarck, 1822 - (FISSURELLIDAE)
- crassa, Emarginula crassa J. de C. Sowerby, 1813 - (FISSURELLIDAE)
- crassa, Gattendorfia crassa A. Schmidt, 1924 † - (GATTENDORFIIDAE) (FOSSIL)
- crassa, Gonioclymenia crassa (Wedekind, 1914 †) - (GONIOCLYMENIIDAE) (FOSSIL)
- crassa, Nanogyra crassa (Smith, 1819 †) - (GRYPHAEIDAE) (FOSSIL)
- crassa, Harpa amouretta crassa (C.F.F. von Krauss, 1848) - (HARPIDAE)
- crassa, Helix crassa E.M. Da Costa, 1778 - syn of: Anisus crassus (E.M. Da Costa, 1778) - (HELICIDAE)
- crassa, Emoda crassa D'Orbigny, 1841 - syn of: Emoda pulcherrima crassa (A.V.M.D. D'Orbigny, 1841) - (HELICINIDAE)
- crassa, Emoda pulcherrima crassa (A.V.M.D. D'Orbigny, 1841) - (HELICINIDAE)
- crassa, Peringia crassa (G.P. Deshayes, 1862 †) - (HYDROBIIDAE) (FOSSIL)
- crassa, Tolmachovia crassa (Thoral, 1935 †) - (ISCHYRINIIDAE) (FOSSIL)
- crassa, Kosmoclymenia crassa Ruan, 1981 † - syn of: Kosmoclymenia lamellosa (Wedekind, 1914 †) - (KOSMOCLYMENIIDAE) (FOSSIL)
- crassa, Aligena crassa (Kautsky 1940) † - (LASAEIDAE) (FOSSIL)
- crassa, Limea crassa (E. Forbes, 1844) - (LIMIDAE)
- crassa, Bembicium crassa R.W. Dunker, 1861 - syn of: Bembicium nanum (J.B.P.A. Lamarck, 1822) - (LITTORINIDAE)
- crassa, Omospira trentonensis crassa Wilson, 1951 † - (LOXONEMATIDAE) (FOSSIL)
- crassa, Lymnaea crassa Razumovskii, 1789 - syn of: Stagnicola palustris (O.F. Müller, 1774) - (LYMNAEIDAE)
- crassa, Maclurites crassa Ulrich & Scofield, 1897 † - (MACLURITIDAE) (FOSSIL)
- crassa, Mactromya crassa A.E.R. Agassiz, 1845 † - (MACTROMYIDAE) (FOSSIL)
- crassa, Granulina crassa C. Smriglio, F. Gubbioli & P. Mariottini, 2000 - (MARGINELLIDAE)
- crassa, Marginella crassa P.F. Röding, 1798 - syn of: Prunum marginatum (I. von Born, 1778) - (MARGINELLIDAE)
- crassa, Nebularia crassa W.J. Swainson, 1822 - syn of: Nebularia aurantia (J.F. Gmelin, 1791) - (MITRIDAE)
- crassa, Montacuta crassa M. Yokoyama, 1927 - syn of: Eolepton crassum (M. Yokoyama, 1927) - (MONTACUTIDAE)
- crassa, Comptella crassa A.G. Beu, 1967 † - (MURICIDAE) (FOSSIL)
- crassa, Purpura crassa H.M.D. de Blainville, 1832 - syn of: Vasula melones (P.L. Duclos, 1832) - (MURICIDAE)
- crassa, Gervillia crassa Buckman † - (MYALINIDAE) (FOSSIL)
- crassa, Myadora crassa (S. Stutchbury, 1830) - (MYOCHAMIDAE)
- crassa, Nassa crassa R.A. Philippi, 1849 - syn of: Nassarius semisulcatus (J.B. Hombron & C.H. Jacquinot, 1848) - (NASSARIIDAE)
- crassa, Demoulia crassa A. Adams, 1853 - syn of: Demoulia obtusata (J.H.F. Link, 1807) - (NASSARIIDAE)
- crassa, Natica crassa P. Nyst, 1843 † - (NATICIDAE) (FOSSIL)
- crassa, Natica crassa M.M. Schepman, 1909 - syn of: Natica arachnoidea (J.F. Gmelin, 1791) - (NATICIDAE)
- crassa, Poteria crassa (C.B. Adams) - (NEOCYCLOTIDAE)
- crassa, Nerita crassa A.A. Gould, 1852 - (NERITIDAE)
- crassa, Trinacria crassa (G.P. Deshayes, 1858 †) - (NOETIIDAE) (FOSSIL)
- crassa, Ledella crassa J. Knudsen, 1970 - (NUCULANIDAE)
- crassa, Nuculana crassa (R.B. Hinds, 1843) - (NUCULANIDAE)
- crassa, Nucula crassa R.B. Hinds, 1843 - syn of: Nuculana crassa (R.B. Hinds, 1843) - (NUCULIDAE)
- crassa, Durga crassa Boehm, 1884 † - (PACHYRISMATIDAE) (FOSSIL)
- crassa, Palaeomutela crassa Amalitsky, 1892 † - (PALAEOMUTELIDAE) (FOSSIL)
- crassa, Hinnites crassa T.A. Conrad, 1857 - syn of: Crassadoma gigantea (J.E. Gray, 1825) - (PECTINIDAE)
- crassa, Hinnites crassa T.A. Conrad, 1857 - syn of: Crassadoma gigantea (J.E. Gray, 1825) - (PECTINIDAE)
- crassa, Pelagiella crassa D. Geyer, 1986 † - (PELAGIELLIDAE) (FOSSIL)
- crassa, Subgrossouvria crassa (Gérard & Contaut 1936 †) - (PERISPHINCTIDAE) (FOSSIL)
- crassa, Tricolia crassa Š. Brusina, 1864 - syn of: Tricolia pullus (C. Linnaeus, 1758) - (PHASIANELLIDAE)
- crassa, Platyclymenia crassa Schindewolf, 1923 † - syn of: Pleuroclymenia costata (C.N. Lange, 1929 †) - (PLATYCLYMENIIDAE) (FOSSIL)
- crassa, Lithasia crassa S.S. Haldeman, 1842 - (PLEUROCERIDAE)
- crassa, Chondrothyra crassa C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- crassa, Tapinotomaria crassa Batten, 1958 † - (PORTLOCKIELLIDAE) (FOSSIL)
- crassa, Gari crassa L.H. Hupé in C. Gay, 1854 - syn of: Gari solida (J.E. Gray, 1828) - (PSAMMOBIIDAE)
- crassa, Pseudoliva crassa (J.F. Gmelin, 1791) - (PSEUDOLIVIDAE)
- crassa, Stephanozyga crassa (J. Wanner, 1922 †) - (PSEUDOZYGOPLEURIDAE) (FOSSIL)
- crassa, Turbonilla crassa S. Nomura, 1936 - (PYRAMIDELLIDAE)
- crassa, Odostomia crassa J.G. Jeffreys, 1884 - syn of: Syrnola wenzi F. Nordsieck, 1972 - (PYRAMIDELLIDAE)
- crassa, Odostomia crassa W. Thompson, 1845 - syn of: Brachystomia eulimoides (S.C.T. Hanley, 1844) - (PYRAMIDELLIDAE)
- crassa, Charonia crassa J.P.S. Grateloup, 1833 † - syn of: Charonia lampas ventricosa (J.P.S. Grateloup, 1833 †) - (RANELLIDAE) (FOSSIL)
- crassa, Lagena crassa H.C.F. Schumacher, 1817 - syn of: Latirolagena smaragdulus (C. Linnaeus, 1758) - (RANELLIDAE)
- crassa, Manzonia crassa (F. Kanmacher, 1798) - (RISSOIDAE)
- crassa, Rissoina crassa (G.F. Angas, 1871) - (RISSOINIDAE)
- crassa, Rissolina crassa G.F. Angas, 1871 - syn of: Rissoina crassa (G.F. Angas, 1871) - (RISSOINIDAE)
- crassa, Finella crassa (C.F. Laseron, 1956) - (SCALIOLIDAE)
- crassa, Sonninia crassa Buckman † - (SONNINIIDAE) (FOSSIL)
- crassa, Sowerbya crassa A.V.M.D. D'Orbigny † - (SOWERBYIDAE) (FOSSIL)
- crassa, Eupera crassa (G. Mandahl-Barth, 1954) - (SPHAERIIDAE)
- crassa, Byssanodonta crassa G. Mandahl-Barth, 1954 - syn of: Eupera crassa (G. Mandahl-Barth, 1954) - (SPHAERIIDAE)
- crassa, Sphincterochila candidissima crassa (P.M. Pallary, 1926) - (SPHINCTEROCHILIDAE)
- crassa, Spiniloma crassa (W.H. Hudleston, 1888 †) - (SPINILOMATIDAE) (FOSSIL)
- crassa, Streptostyla crassa H. Strebel, 1877 - (SPIRAXIDAE)
- crassa, Succinea canella crassa C.M.F. Ancey, 1889 - (SUCCINEIDAE)
- crassa, Arcopagia crassa (T. Pennant, 1777) - (TELLINIDAE)
- crassa, Melania crassa Münster, 1841 † - syn of: Coelostylina crassa (Münster, 1841 †) - (THIARIDAE) (FOSSIL)
- crassa, Thracia crassa E. Becher, 1886 - syn of: Thracia septentrionalis J.G. Jeffreys, 1872 - (THRACIIDAE)
- crassa, Stomatella crassa R.P. Montrouzier in S.M. Souverbie & R.P. Montrouzier, 1870 - (TROCHIDAE)
- crassa, Boutillieria crassa (A.A. Baudon, 1855 †) - (TURBINIDAE) (FOSSIL)
- crassa, Pleurotoma crassa E.A. Smith, 1888 - syn of: Clavus aglaia (W.H. Dall, 1918) - (TURRIDAE)
- crassa, Palmerella mortoni crassa Garvie, 2013 † - (TURRITELLIDAE) (FOSSIL)
- crassa, Undastriatostyliolina crassa Farsan, 1983 † - (UNDASTRIATOSTYLIOLINIDAE) (FOSSIL)
- crassa, Lamprotula crassa (W. Wood, 1815) - (UNIONIDAE)
- crassa, Anodonta crassa J. Zelebor, 1851 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- crassa, Pleurostemma intusmalleata crassa C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- crassa, Dollfusia crassa A.E.M. Cossmann, 1886 † - (VENERIDAE) (FOSSIL)
- crassa, Atamarcia crassa J. Marwick, 1927 † - (VENERIDAE) (FOSSIL)
- crassa, Venus crassa J.R.C. Quoy & J.P. Gaimard, 1835 - syn of: Tawera spissa (G.P. Deshayes, 1835) - (VENERIDAE)
- crassa, Periglypta crassa J.E. Gray, 1825 - syn of: Meretrix casta (J.F. Gmelin, 1791) - (VENERIDAE)
- crassa, Mekongia crassa (W.H. Benson, 1836) - (VIVIPARIDAE)
- crassa, Paludina crassa A. Villa & J. Villa, 1841 - syn of: Viviparus ater G.J. De Cristofori & G. Jan, 1832 - (VIVIPARIDAE)
- crassa, Viviparus crassa Hilbert, 1905 - syn of: Viviparus viviparus (C. Linnaeus, 1758) - (VIVIPARIDAE)
- crassa, Alcithoe fissurata crassa P. Bail & A. Limpus, 2005 - (VOLUTIDAE)
- crassa, Yochelcionella crassa Esakova & H. Zhegallo, 1996 † - (YOCHELCIONELLIDAE) (FOSSIL)
- crassa, Zygopleura crassa J. Wanner, 1922 † - syn of: Stephanozyga crassa (J. Wanner, 1922 †) - (ZYGOPLEURIDAE) (FOSSIL)
- crassa atlantica, Manzonia crassa atlantica F. Nordsieck, 1972 - (RISSOIDAE)
- crassa bituberculata, Marsupina crassa bituberculata M.M. Schepman, 1887 - syn of: Marsupina bufo (J.G. Bruguière, 1792) - (BURSIDAE)
- crassa carribbaea, Bursa crassa carribbaea M. Smith, 1948 - syn of: Marsupina bufo (J.G. Bruguière, 1792) - (BURSIDAE)
- crassa carribbaea, Marsupina crassa carribbaea M. Smith, 1948 - syn of: Marsupina bufo (J.G. Bruguière, 1792) - (BURSIDAE)
- crassa complanata, Emarginula crassa complanata F.W. Harmer † - (FISSURELLIDAE) (FOSSIL)
- crassa exigua, Manzonia crassa exigua (F. Kanmacher, 1798) - (RISSOIDAE)
- crassa illepida, Nuculana crassa illepida T. Iredale, 1929 - syn of: Nuculana crassa (R.B. Hinds, 1843) - (NUCULANIDAE)
- crassa mediterranea, Manzonia crassa mediterranea F. Nordsieck, 1972 - (RISSOIDAE)
- crassa minuta, Manzonia crassa minuta F. Nordsieck, 1972 - (RISSOIDAE)
- crassa monticola, Ampullaria crassa monticola J.H. Vernhout, 1914 - syn of: Asolene crassa (W.J. Swainson, 1823) - (AMPULLARIIDAE)
- crassa nubila, Asolene crassa nubila (L.A. Reeve, 1856) - (AMPULLARIIDAE)
- crassa nux, Liomesus crassa nux W.H. Dall, 1877 - syn of: Pseudoliomesus nux (W.H. Dall, 1877) - (BUCCINIDAE)
- crassa oblonga, Ampullaria crassa oblonga G. Nevill, 1884 - syn of: Asolene crassa (W.J. Swainson, 1823) - (AMPULLARIIDAE)
- crassa proavus, Bursa crassa proavus H.A. Pilsbry, 1922 - syn of: Marsupina bufo (J.G. Bruguière, 1792) - (BURSIDAE)
- crassa reducta, Arcopagia crassa reducta G.F. Dollfus & P. Dautzenberg, 1886 † - (TELLINIDAE) (FOSSIL)
- crassa vindobonensis, Cardita crassa vindobonensis F. Sacco, 1899 † - syn of: Cardita vindobonensis F. Sacco, 1899 † - (CARDITIDAE) (FOSSIL)
- crassacauda, Hemifusus crassacauda R.A. Philippi, 1849 - syn of: Hemifusus crassicauda (R.A. Philippi, 1849) - (MELONGENIDAE)
- Crassacula, syn of: Genus Crassasulca E.H. Vokes, 1988 (CRASSATELLIDAE)
- Crassacuna, Genus Crassacuna P.U. Middelfart, 2002 (CONDYLOCARDIIDAE)
- Crassadoma, Genus Crassadoma F.R. Bernard, 1986 (PECTINIDAE)
- crassaformis, Turmalites crassaformis Hajlasz, 1976 † - (TURMALITIDAE) (FOSSIL)
- crassalabra, Strophiops crassalabra C.J. Maynard & W.F. Clapp, 1921 - (CERIONIDAE)
- crassamarga, Strophiops crassamarga C.J. Maynard & W.F. Clapp, 1924 - (CERIONIDAE)
- crassaplica, Caestocorbula crassaplica Vincent, 1910 † - (CORBULIDAE) (FOSSIL)
- crassaplica, Caesticorbula crassaplica W.M. Gabb, 1860 † - syn of: Caestocorbula crassiplica (W.M. Gabb, 1860 †) - (CORBULIDAE) (FOSSIL)
- crassaspera, Clathromangelia crassaspera J. Grant & H.R. Gale, 1931 - syn of: Clathromangelia fuscoligata (W.H. Dall, 1871) - (CLATHURELLIDAE)
- Crassasulca, Genus Crassasulca E.H. Vokes, 1988 (CRASSATELLIDAE)
- crassata, Chondrina crassata P. Fagot, 1888 - syn of: Chondrina tenuimarginata C. des Moulins, 1835 - (CHONDRINIDAE)
- Crassatella, Genus Crassatella J.B.P.A. Lamarck, 1799 (CRASSATELLIDAE)
- crassatella, Spisula crassatella J.B.P.A. Lamarck, 1818 - syn of: Spisula solida (C. Linnaeus, 1758) - (MACTRIDAE)
- crassatella, Natica crassatella É.A.A. Locard, 1886 - syn of: Euspira intricata (E. Donovan, 1804) - (NATICIDAE)
- crassatella, Polinices crassatella É.A.A. Locard, 1886 - syn of: Euspira intricata (E. Donovan, 1804) - (NATICIDAE)
- crassatellaeformis, Alococoncha crassatellaeformis (R. Tate, 1896 †) - (CTENODONTIDAE) (FOSSIL)
- crassatellaeformis, Isoarca crassatellaeformis R. Tate, 1896 † - syn of: Alococoncha crassatellaeformis (R. Tate, 1896 †) - (ISOARCIDAE) (FOSSIL)
- crassatellaeformis, Psammobia crassatellaeformis A.E.M. Cossmann, 1883 † - (PSAMMOBIIDAE) (FOSSIL)
- crassatellaeformis, Circe crassatellaeformis A.E.M. Cossmann, 1906 † - (VENERIDAE) (FOSSIL)
- CRASSATELLIDAE Férussac, 1822 - Family (BIVALVIA-HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-CARDITIDA [Order]-CRASSATELLOIDEA [Superfamily])
- crassatelliformis, Atamarcia crassatelliformis (J. Marwick, 1927 †) - (VENERIDAE) (FOSSIL)
- Crassatellina, Genus Crassatellina Meek, 1871 † (ASTARTIDAE) (FOSSIL)
- Crassatellites, syn of: Genus Crassatella J.B.P.A. Lamarck, 1799 (CRASSATELLIDAE)
- crassatelloides, Saccella crassatelloides A.A. Olsson, 1964 † - (NUCULANIDAE) (FOSSIL)
- crassatelloides, Nuculana crassatelloides Lautenschlager, 1957 † - (NUCULANIDAE) (FOSSIL)
- CRASSATELLOPSIDAE Ulrich, 1884 † - Family (BIVALVIA-HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-ACTINODONTIDA [Order]-ORIOCRASSATELLOIDEA [Superfamily]) (FOSSIL)
- Crassatellopsis, Genus Crassatellopsis Beushausen, 1895 † (CRASSATELLOPSIDAE) (FOSSIL)
- crassatellus, Unio crassatellus J.R. Bourguignat in É.A.A. Locard, 1882 - syn of: Unio arcuatus N.R. Bouchard-Chantereaux, 1838 - (UNIONIDAE)
- crassatina, Ampullinopsis crassatina (J.B.P.A. Lamarck, 1804 †) - (AMPULLINIDAE) (FOSSIL)
- Crassatina, Genus Crassatina W. Kobelt, 1881 (CRASSATELLIDAE)
- crassatina, Cucullaea crassatina J.B.P.A. Lamarck, 1801 † - (CUCULLAEIDAE) (FOSSIL)
- crassatina, Natica crassatina J.B.P.A. Lamarck, 1804 † - syn of: Ampullinopsis crassatina (J.B.P.A. Lamarck, 1804 †) - (NATICIDAE) (FOSSIL)
- crassatis, Ectogrammysia crassatis Hoare & al., 1989 † - (GRAMMYSIIDAE) (FOSSIL)
- Crassauris, Genus Crassauris Garvie, 2013 † (MANGELIIDAE) (FOSSIL)
- crassecochlia, Turcutheca crassecochlia (A.V. Sysoev, 1962 †) - (CIRCOTHECIDAE) (FOSSIL)
- crassecostatum, Mantelliceras crassecostatum M. Collignon, 1964 † - syn of: Mantelliceras picteti A. Hyatt, 1903 † - (ACANTHOCERATIDAE) (FOSSIL)
- crassecostatum, Cerithium vulgatum crassecostatum F. Sacco, 1895 † - (CERITHIIDAE) (FOSSIL)
- crasselirata, Clathurella crasselirata R.P.J. Hervier, 1897 - syn of: Pseudodaphnella crasselirata (R.P.J. Hervier, 1897) - (CLATHURELLIDAE)
- crasselirata, Pseudodaphnella crasselirata (R.P.J. Hervier, 1897) - (RAPHITOMIDAE)
- crassella, Hinemoa crassella J.J. Van Aartsen & J.X. Corgan, 1996 - (PYRAMIDELLIDAE)
- crassenodosa, Purpuroidea crassenodosa E.A.L. Kittl, 1894 † - (PURPUROIDEIDAE) (FOSSIL)
- crasseocochlia, Turcutheca crasseocochlia (Syssoiev, 1962 †) - (CIRCOTHECIDAE) (FOSSIL)
- crasseradiata, Patella crasseradiata E.A.L. Kittl, 1894 † - (PATELLIDAE) (FOSSIL)
- crassescens, Dactylioceras crassescens C.T. Simpson, 1855 † - (DACTYLIOCERATIDAE) (FOSSIL)
- crassestriatus, Arcestes crassestriatus Mojsisovics, 1873 † - syn of: Cladiscites crassestriatus (Mojsisovics, 1873 †) - (ARCESTIDAE) (FOSSIL)
- crassestriatus, Cladiscites crassestriatus (Mojsisovics, 1873 †) - (CLADISCITIDAE) (FOSSIL)
- crassetuberculatum, Nonyaniceras crassetuberculatum Klinger & J. Kennedy, 1977 † - (ANCYLOCERATIDAE) (FOSSIL)
- crassetuberculatum, Labeceras crassetuberculatum Klinger, 1976 † - (LABECERATIDAE) (FOSSIL)
- crassetuberculatum magnum, Labeceras crassetuberculatum magnum Aguirre-Urreta & Riccardi, 1988 † - (LABECERATIDAE) (FOSSIL)
- crassiamus, Unio crassiamus H.B. Preston, 1912 - syn of: Pseudunio auricularius (L. Spengler, 1793) - (UNIONIDAE)
- Crassiana, syn of: Genus Crassunio Modell, 1964 (UNIONIDAE)
- Crassiatractites, Genus Crassiatractites Mariotti & Pignatti, 1992 † (AULACOCERIDA (UNASSIGNED)) (FOSSIL)
- crassiaxialis, Borsonia crassiaxialis P.A. Maxwell, 1992 † - (BORSONIIDAE) (FOSSIL)
- crassiaxis, Helicarion crassiaxis J.T. Kuroda, 1969 - (HELICARIONIDAE)
- crassibasis, Liotina crassibasis (E.A. Smith, 1880) - (LIOTIIDAE)
- Crassibougia, Genus Crassibougia P. Stahlschmidt & K. Fraussen, 2012 (FASCIOLARIIDAE)
- crassibuca, Idiopoma crassibuca P.B. Sarasin & K.F. Sarasin, 1898 - syn of: Idiopoma crassibucca (P.B. Sarasin & K.F. Sarasin, 1898) - (VIVIPARIDAE)
- crassibucca, Idiopoma crassibucca (P.B. Sarasin & K.F. Sarasin, 1898) - (VIVIPARIDAE)
- crassibullata, Sonninia crassibullata Buckman † - (SONNINIIDAE) (FOSSIL)
- crassibundum, Dactylioceras crassibundum (Simpson) † - (DACTYLIOCERATIDAE) (FOSSIL)
- crassicallosa, Odostomia crassicallosa S. Nomura, 1937 - (PYRAMIDELLIDAE)
- crassicallosa, Taia crassicallosa T.N. Annandale & Surya Rao, 1925 - (VIVIPARIDAE)
- Crassicantharus, Genus Crassicantharus W.F. Ponder, 1972 (BUCCINIDAE)
- Crassicardia, syn of: Genus Cyclocardia T.A. Conrad, 1867 (CARDITIDAE)
- Crassicardia, syn of: Genus Cyclocardia T.A. Conrad, 1867 (CARDITIDAE)
- crassicardia, Pinctada crassicardia R. Tate, 1886 † - (PTERIIDAE) (FOSSIL)
- crassicardo, Cuna crassicardo C.R. Laws, 1936 † - (CONDYLOCARDIIDAE) (FOSSIL)
- crassicardo, Lyropecten crassicardo (T.A. Conrad, 1856 †) - (PECTINIDAE) (FOSSIL)
- crassicardo, Casertiana crassicardo L.V. Krivosheina, 1976 - syn of: Pisidium casertanum (Poli, 1791) - (SPHAERIIDAE)
- crassicardo, Scissileda crassicardo R.N. Kilburn, 1994 - (YOLDIIDAE)
- crassicarinata, Eatonina crassicarinata (A.W.B. Powell, 1937) - (CINGULOPSIDAE)
- crassicarinata, Eatoniella crassicarinata A.W.B. Powell, 1937 - syn of: Eatonina crassicarinata (A.W.B. Powell, 1937) - (EATONIELLIDAE)
- crassicarinata, Videna crassicarinata H.C. Fulton, 1907 - (TROCHOMORPHIDAE)
- crassicauda, Hemifusus crassicauda (R.A. Philippi, 1849) - (MELONGENIDAE)
- crassicaudatus, Hemifusus crassicaudatus R.A. Philippi, 1849 - syn of: Hemifusus crassicauda (R.A. Philippi, 1849) - (MELONGENIDAE)
- crassiceps, Tmaegoceras crassiceps Pompeckj, 1901 † - (ARIETITIDAE) (FOSSIL)
- crassiceps, Hebeulima crassiceps C.F. Laseron, 1955 - (EULIMIDAE)
- Crassiceras, Genus Crassiceras Franceschi, 1921 † (PHYMATOCERATIDAE) (FOSSIL)
- crassicincta, Seila crassicincta (M. Yokoyama, 1926 †) - (CERITHIOPSIDAE) (FOSSIL)
- crassicingulata, Pseudoetrema crassicingulata (M.M. Schepman, 1913) - (CLATHURELLIDAE)
- crassicinta, Seila crassicinta M. Yokoyama, 1926 † - syn of: Seila crassicincta (M. Yokoyama, 1926 †) - (CERITHIOPSIDAE) (FOSSIL)
- Crassiclava, Genus Crassiclava J.H. McLean, 1971 (PSEUDOMELATOMIDAE)
- Crassicoeloceras, Genus Crassicoeloceras Buckman, 1926 † (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- crassicolle, Opisthostoma crassicolle J.J. Vermeulen, 1994 - (DIPLOMMATINIDAE)
- crassicollosa, Odostomia crassicollosa S. Nomura, 1937 - (PYRAMIDELLIDAE)
- Crassiconcha, Genus Crassiconcha Frebold, 1932 † (MODIOMORPHIDAE) (FOSSIL)
- crassiconus, Pseudestea crassiconus (A.W.B. Powell, 1933) - (ANABATHRIDAE)
- crassicorda, Payraudeautia crassicorda E. Robba, Pedriali & E. Quaggiotto, 2016 † - (NATICIDAE) (FOSSIL)
- crassicordata, Estea crassicordata A.W.B. Powell, 1937 - syn of: Tridentifera crassicordata (A.W.B. Powell, 1937) - (ANABATHRIDAE)
- crassicordata, Tridentifera crassicordata (A.W.B. Powell, 1937) - (RASTODENTIDAE)
- crassicordata, Onoba crassicordata H.W. Worsfold, G.J. Avern & W.F. Ponder, 1993 - (RISSOIDAE)
- crassicordatum, Crassicymatium crassicordatum A.G. Beu, 2010 † - (RANELLIDAE) (FOSSIL)
- crassicornis, Doto crassicornis G.O. Sars, 1870 - (DOTIDAE)
- crassicornis, Hermissenda crassicornis (J.F. von Eschscholtz, 1831) - (FACELINIDAE)
- crassicornu, Ceratites crassicornu Smith, 1914 † - syn of: Brackites vogdesi (Smith, 1904 †) - (CERATITIDAE) (FOSSIL)
- crassicosta, Anadara crassicosta A. Heilprin, 1887 † - (ARCIDAE) (FOSSIL)
- crassicosta, Argonauta crassicosta H.M.D. de Blainville, 1826 - syn of: Argonauta hians J. Lightfoot, 1786 - (ARGONAUTIDAE)
- crassicosta, Costigervillia crassicosta (Morris & Lycett) † - (BAKEVELLIIDAE) (FOSSIL)
- crassicosta, Cardita crassicosta (J.B.P.A. Lamarck, 1819) - (CARDITIDAE)
- crassicosta, Mytilicardia crassicosta J.B.P.A. Lamarck, 1819 - syn of: Cardita crassicosta (J.B.P.A. Lamarck, 1819) - (CARDITIDAE)
- crassicosta, Turricula crassicosta F.E. Edwards, 1857 † - (CLAVATULIDAE) (FOSSIL)
- crassicosta, Clymenia crassicosta Wedekind, 1908 † - syn of: Rectoclymenia crassicosta (Wedekind, 1908 †) - (CLYMENIIDAE) (FOSSIL)
- crassicosta, Condylocardia crassicosta F. Bernard, 1897 - (CONDYLOCARDIIDAE)
- crassicosta, Crassimarginata crassicosta Jhaveri, 1969 † - (CRASSIMARGINATIDAE) (FOSSIL)
- crassicosta, Opalia crassicosta J.E. Gray, 1847 - syn of: Opalia hotessieriana (A.V.M.D. D'Orbigny, 1842) - (EPITONIIDAE)
- crassicosta, Cretigena crassicosta R.A. Bank, Gittenberger & E. Neubert, 2013 - (HYGROMIIDAE)
- crassicosta, Narina crassicosta A.A. Schileyko, 1978 - (HYGROMIIDAE)
- crassicosta, Melanopsis anceps crassicosta Gaudry & P. Fischer in Gaudry, 1867 † - (MELANOPSIDAE) (FOSSIL)
- crassicosta, Muricopsis crassicosta (É.A. Benoist, 1873 †) - (MURICIDAE) (FOSSIL)
- crassicosta, Patella crassicosta Tate & Moore † - (PATELLIDAE) (FOSSIL)
- crassicosta, Phymatoceras crassicosta Merla 1932 † - (PHYMATOCERATIDAE) (FOSSIL)
- crassicosta, Odostomia crassicosta W.L. May, 1915 - (PYRAMIDELLIDAE)
- crassicosta, Rectoclymenia crassicosta (Wedekind, 1908 †) - (RECTOCLYMENIIDAE) (FOSSIL)
- crassicosta, Pusillina crassicosta (A.W.B. Powell, 1955) - (RISSOIDAE)
- crassicosta, Haurakia crassicosta (A.W.B. Powell, 1955) - syn of: Pusillina crassicosta (A.W.B. Powell, 1955) - (RISSOIDAE)
- crassicosta, Semisulcospira crassicosta H.X. Liu, Wang & Y.H. Duan, 1994 - (SEMISULCOSPIRIDAE)
- crassicosta, Spondylus crassicosta J.B.P.A. Lamarck, 1819 † - (SPONDYLIDAE) (FOSSIL)
- crassicosta, Acremodonta crassicosta (A.W.B. Powell, 1937) - (TROCHACLIDIDAE)
- crassicosta, Thoristella crassicosta A.W.B. Powell, 1937 - syn of: Acremodonta crassicosta (A.W.B. Powell, 1937) - (TROCHIDAE)
- crassicosta, Leukoma crassicosta (G.P. Deshayes, 1835) - (VENERIDAE)
- crassicosta, Venus crassicosta G.P. Deshayes, 1835 - syn of: Leukoma crassicosta (G.P. Deshayes, 1835) - (VENERIDAE)
- crassicosta aquitanicus, Spondylus crassicosta aquitanicus A.E.M. Cossmann & M.A. Peyrot, 1921 † - (SPONDYLIDAE) (FOSSIL)
- crassicostae, Metoicoceras crassicostae L.W. Stephenson, 1953 † - (ACANTHOCERATIDAE) (FOSSIL)
- crassicostata, Anahamulina crassicostata (Karakasch, 1907 †) - (ANAHAMULINIDAE) (FOSSIL)
- crassicostata, Alaria crassicostata W.H. Hudleston, 1888 † - (APORRHAIDAE) (FOSSIL)
- crassicostata, Anadara crassicostata (H. Adams, 1873) - (ARCIDAE)
- crassicostata, Buccinopsis crassicostata W.M. Gabb, 1876 † - (BUCCINIDAE) (FOSSIL)
- crassicostata, Siphonalia paradoxica crassicostata Martin, 1926 - (BUCCINIDAE)
- crassicostata, Australocosmica crassicostata F. Criscione & F. Köhler, 2013 - (CAMAENIDAE)
- crassicostata, Trachia crassicostata (W.H. Benson) - (CAMAENIDAE)
- crassicostata, Trichotropis crassicostata J.C. Melvill, 1912 - (CAPULIDAE)
- crassicostata, Cardiola crassicostata J.W. Hall & R.P. Whitfield † - (CARDIOLIDAE) (FOSSIL)
- crassicostata, Cardita crassicostata L.A. Reeve, 1843 - syn of: Cardita crassicosta (J.B.P.A. Lamarck, 1819) - (CARDITIDAE)
- crassicostata, Venericardia crassicostata G.B. I Sowerby, 1825 - syn of: Cardites crassicostatus (G.B. I Sowerby, 1825) - (CARDITIDAE)
- crassicostata, Cerion crassicostata H.A. Pilsbry, 1896 - (CERIONIDAE)
- crassicostata, Lienardia crassicostata (W.H. Pease, 1860) - (CLATHURELLIDAE)
- crassicostata, Siciliaria crassicostata (L. Pfeiffer, 1856) - (CLAUSILIIDAE)
- crassicostata, Parabalea decimvolvis crassicostata W.K. Weyrauch, 1958 - (CLAUSILIIDAE)
- crassicostata, Argalista crassicostata (R. Murdoch, 1905) - (COLLONIIDAE)
- crassicostata, Exelissa crassicostata Cataldo, 2017 † - (CRYPTAULACIDAE) (FOSSIL)
- crassicostata, Opalia crassicostata C.B. Adams, 1845 - syn of: Opalia hotessieriana (A.V.M.D. D'Orbigny, 1842) - (EPITONIIDAE)
- crassicostata, Epitonium crassicostata G.B. Sowerby, 1844 - syn of: Opalia hotessieriana (A.V.M.D. D'Orbigny, 1842) - (EPITONIIDAE)
- crassicostata, Opalia crassicostata J.E. Gray, 1847 - syn of: Opalia hotessieriana (A.V.M.D. D'Orbigny, 1842) - (EPITONIIDAE)
- crassicostata, Emarginula crassicostata G.B. II Sowerby, 1863 - (FISSURELLIDAE)
- crassicostata, Hamulina crassicostata Karakasch, 1907 † - syn of: Anahamulina crassicostata (Karakasch, 1907 †) - (HAMULINIDAE) (FOSSIL)
- crassicostata, Limopsis costulata crassicostata Sokolov † - (LIMOPSIDAE) (FOSSIL)
- crassicostata, Sphaeriola crassicostata (A.V.M.D. D'Orbigny, 1850 †) - (LUCINIDAE) (FOSSIL)
- crassicostata, Pyrgocythara crassicostata (C.B. Adams, 1850) - (MANGELIIDAE)
- crassicostata, Nebularia crassicostata G.B. II Sowerby, 1874 - (MITRIDAE)
- crassicostata, Vitularia crassicostata (G.P. Deshayes, 1835 †) - (MURICIDAE) (FOSSIL)
- crassicostata, Leopoldia crassicostata (Inlay, 1938 †) - (NEOCOMITIDAE) (FOSSIL)
- crassicostata, Ledella crassicostata (P.A. Maxwell, 1988 †) - (NUCULANIDAE) (FOSSIL)
- crassicostata, Nucula crassicostata E.A. Smith, 1872 - (NUCULIDAE)
- crassicostata, Alaskozygopleura crassicostata Blodgett, 1992 † - (PALAEOZYGOPLEURIDAE) (FOSSIL)
- crassicostata, Mimachlamys crassicostata (G.B. II Sowerby, 1842) - (PECTINIDAE)
- crassicostata, Ampullosansonia crassicostata T. Kase, 1999 - (PICKWORTHIIDAE)
- crassicostata, Exilia crassicostata H.H. Suter, 1917 † - (PTYCHATRACTIDAE) (FOSSIL)
- crassicostata, Tropaeas crassicostata (G.B. III Sowerby, 1901) - (PYRAMIDELLIDAE)
- crassicostata, Babella crassicostata E. Saurin, 1958 - (PYRAMIDELLIDAE)
- crassicostata, Rissoa crassicostata C.B. Adams, 1845 - syn of: Opalia hotessieriana (A.V.M.D. D'Orbigny, 1842) - (RISSOIDAE)
- crassicostata, Alvania crassicostata A. Risso, 1826 - syn of: Alvania discors (T. Allan, 1818) - (RISSOIDAE)
- crassicostata, Brookula crassicostata (H. Strebel, 1908) - (SEGUENZIOIDEA (UNASSIGNED))
- crassicostata, Brookula crassicostata H. Strebel, 1908 - syn of: Brookula crassicostata (H. Strebel, 1908) - (SEGUENZIOIDEA (unassigned))
- crassicostata, Siphonaria crassicostata G.P. Deshayes, 1861 † - (SIPHONARIIDAE) (FOSSIL)
- crassicostata, Liotella crassicostata (H. Strebel, 1908) - (SKENEIDAE)
- crassicostata, Sonninia crassicostata Buckman † - (SONNINIIDAE) (FOSSIL)
- crassicostata, Euterebra tristis crassicostata (H.H. Suter, 1909) - (TEREBRIDAE)
- crassicostata, Anomalocardia crassicostata H. Adams, 1873 - syn of: Anadara crassicostata (H. Adams, 1873) - (VENERIDAE)
- crassicostata, Leukoma crassicostata G.P. Deshayes, 1835 - syn of: Leukoma crassicosta (G.P. Deshayes, 1835) - (VENERIDAE)
- crassicostata, Mitraelyria mitraeformis crassicostata (T.A. Darragh, 1988 †) - (VOLUTIDAE) (FOSSIL)
- crassicostatum, Neokentroceras crassicostatum Howarth, 1965 † - (BRANCOCERATIDAE) (FOSSIL)
- crassicostatum, Pseudocadoceras crassicostatum Imlay, 1953 † - (CADOCERATIDAE) (FOSSIL)
- crassicostatum, Calliostoma crassicostatum M.M. Schepman, 1908 - (CALLIOSTOMATIDAE)
- crassicostatum, Bittium crassicostatum (Etheridge & Bell, 1898) † - (CERITHIIDAE) (FOSSIL)
- crassicostatum, Tenuicerithium crassicostatum (G.P. Deshayes, 1864 †) - (CERITHIIDAE) (FOSSIL)
- crassicostatum, Porpoceras crassicostatum Guex, 1972 † - (DACTYLIOCERATIDAE) (FOSSIL)
- crassicostatum, Echioceras crassicostatum Trueman & Williams † - (ECHIOCERATIDAE) (FOSSIL)
- crassicostatum, Epitonium crassicostatum E. Gittenberger & A. Gittenberger, 2005 - (EPITONIIDAE)
- crassicostatum, Cirsotrema crassicostatum (G.P. Deshayes, 1839 †) - (EPITONIIDAE) (FOSSIL)
- crassicostatum, Baidites crassicostatum (Welter, 1922 †) - (FLEMINGITIDAE) (FOSSIL)
- crassicostatum, Glottoceras crassicostatum Sommermeier, 1910 † - (KNEMICERATIDAE) (FOSSIL)
- crassicostatum, Labeceras crassicostatum M. Collignon, 1962 † - (LABECERATIDAE) (FOSSIL)
- crassicostatum, Cyclostrema crassicostatum H. Strebel, 1908 - syn of: Brookula crassicostata (H. Strebel, 1908) - (LIOTIIDAE)
- crassicostatum, Liuchengoceras crassicostatum J.K. Zhao & al., 1978 † - (LIUCHENGOCERATIDAE) (FOSSIL)
- crassicostatum, Furloceras crassicostatum (Merla, 1932 †) - (PHYMATOCERATIDAE) (FOSSIL)
- crassicostatus, Prosipho crassicostatus (J.C. Melvill & R. Standen, 1907) - (BUCCINIDAE)
- crassicostatus, Callistochiton crassicostatus H.A. Pilsbry, 1893 - (CALLISTOPLACIDAE)
- crassicostatus, Cardites crassicostatus (G.B. I Sowerby, 1825) - (CARDITIDAE)
- crassicostatus, Columbites crassicostatus Guex & al., 2005 † - (COLUMBITIDAE) (FOSSIL)
- crassicostatus, Paradanubites crassicostatus Bucher, 1989 † - (DANUBITIDAE) (FOSSIL)
- crassicostatus, Colombiceras crassicostatus (A.V.M.D. D'Orbigny, 1840 †) - (DESHAYESITIDAE) (FOSSIL)
- crassicostatus, Streptochetus crassicostatus (G.P. Deshayes, 1835 †) - (FASCIOLARIIDAE) (FOSSIL)
- crassicostatus, Hippurites crassicostatus J.H.F. Douvillé, 1893 † - syn of: Hippurites canalicatus Roquand, 1841 † - (HIPPURITIDAE) (FOSSIL)
- crassicostatus, Decorites crassicostatus Ruzhentsev & Bogoslovskaya, 1975 † - (HOMOCERATIDAE) (FOSSIL)
- crassicostatus, Decliveites crassicostatus Aguirre-Urreta & Rawson, 2010 † - (NEOCOMITIDAE) (FOSSIL)
- crassicostatus, Virgatites crassicostatus Mitta, 1987 † - (PERISPHINCTIDAE) (FOSSIL)
- crassicostatus, Pugnellus crassicostatus Noetling, 1895 † - (PUGNELLIDAE) (FOSSIL)
- crassicostatus, Sassia crassicostatus R. Tate, 1888 † - (RANELLIDAE) (FOSSIL)
- crassicostatus, Sibirites crassicostatus H. Guo, 1982 † - (SIBIRITIDAE) (FOSSIL)
- crassicostatus, Stehnocephalites crassicostatus Riccardi & Westermann, 1991 † - (SPHAEROCERATIDAE) (FOSSIL)
- crassicostatus, Parabigotites crassicostatus Imlay, 1961 † - (STEPHANOCERATIDAE) (FOSSIL)
- crassicostum, Caecum crassicostum W.M. Gabb, 1881 - syn of: Caecum floridanum W. Stimpson, 1851 - (CAECIDAE)
- crassicrenulatus, Anasirenites crassicrenulatus Lukeneder & Lukeneder, 2014 † - (TRACHYCERATIDAE) (FOSSIL)
- Crassicymatium, Genus Crassicymatium Beu, 2010 † (RANELLIDAE) (FOSSIL)
- crassidens, Astarte crassidens W.J. Broderip & G.B. I Sowerby, 1829 - syn of: Cyclocardia crassidens (W.J. Broderip & G.B. I Sowerby, 1829) - (ASTARTIDAE)
- crassidens, Prosodacna crassidens C. Rousseau † - (BIVALVIA INCERTAE SEDIS) (FOSSIL)
- crassidens, Cyclocardia crassidens (W.J. Broderip & G.B. I Sowerby, 1829) - (CARDITIDAE)
- crassidens, Stolidoma crassidens G.P. Deshayes, 1863 † - (ELLOBIIDAE) (FOSSIL)
- crassidens, Traliopsis crassidens (Melleville, 1843 †) - (ELLOBIIDAE) (FOSSIL)
- crassidens, Lasaea undulata crassidens G.P. Deshayes, 1858 † - (LASAEIDAE) (FOSSIL)
- crassidens, Lucina crassidens Wood, 1879 † - (LUCINIDAE) (FOSSIL)
- crassidens, Nucula crassidens M. Nicklés, 1955 - (NUCULIDAE)
- crassidens, Clidiophora crassidens (Conad 1838) † - (PANDORIDAE) (FOSSIL)
- crassidens, Clidiophora crassidens (T.A. Conrad, 1838 †) - (PANDORIDAE) (FOSSIL)
- crassidens, Distorsio crassidens (T.A. Conrad, 1848 †) - (PERSONIDAE) (FOSSIL)
- crassidens, Gulella crassidens (L. Pfeiffer, 1859) - (STREPTAXIDAE)
- crassidens, Ennea crassidens L. Pfeiffer, 1859 - syn of: Gulella crassidens (L. Pfeiffer, 1859) - (STREPTAXIDAE)
- crassidens, Barytellina crassidens J. Marwick, 1924 † - (TELLINIDAE) (FOSSIL)
- crassidens, Elliptio crassidens J.B.P.A. Lamarck, 1819 - (UNIONIDAE)
- crassidens incrassata, Elliptio crassidens incrassata I. Lea, 1843 - syn of: Elliptio crassidens J.B.P.A. Lamarck, 1819 - (UNIONIDAE)
- crassidens jonesi, Gulella crassidens jonesi A.C. van Bruggen, 1969 - (STREPTAXIDAE)
- crassidentata, Achatinella crassidentata L. Pfeiffer - syn of: Achatinella fulgens W. Newcomb, 1853 - (ACHATINELLIDAE)
- crassidentata, Cunanax crassidentata (B.C. Cotton, 1930) - (CONDYLOCARDIIDAE)
- crassidentata, Condylocardia crassidentata (B.C. Cotton, 1930) - syn of: Cunanax crassidentata (B.C. Cotton, 1930) - (CONDYLOCARDIIDAE)
- crassidentata, Crenatula crassidentata F.P. Jousseaume in É. Lamy, 1929 - syn of: Crenatula picta (J.F. Gmelin, 1791) - (PTERIIDAE)
- crassidorsata, Pseudovaldedorsella crassidorsata (Karakash, 1907 †) - (HOLCODISCIDAE) (FOSSIL)
- crassifactum, Dactylioceras crassifactum C.T. Simpson, 1855 † - (DACTYLIOCERATIDAE) (FOSSIL)
- crassiformis, Arthritica crassiformis A.W.B. Powell, 1933 - (LASAEIDAE)
- crassiformis, Paphies crassiformis (P. Marshall & R. Murdoch, 1920 †) - (MESODESMATIDAE) (FOSSIL)
- crassiformis, Sonninia crassiformis Buckman † - (SONNINIIDAE) (FOSSIL)
- crassigranosa, Nassa crassigranosa R. Tate, 1888 † - (MURICIDAE) (FOSSIL)
- crassigranosa, Gibbula crassigranosa (Tenison Woods, 1877 †) - (TROCHIDAE) (FOSSIL)
- crassigranosus, Nassarius crassigranosus (R. Tate, 1888 †) - (NASSARIIDAE) (FOSSIL)
- crassigranulata, Paramelania damoni crassigranulata (E.A. Smith, 1881) - (PALUDOMIDAE)
- crassigranulata, Triphora crassigranulata (J.P.J. Ravn, 1933 †) - (TRIPHORIDAE) (FOSSIL)
- crassilabellum, Vernelia crassilabellum Xi, 1980 † - (NATICOPSIDAE) (FOSSIL)
- crassilabiatus, Ocenebra crassilabiatus Hilber, 1879 † - (MURICIDAE) (FOSSIL)
- crassilabra, Isabellaria thessalonica crassilabra E. Neubert, 1993 - (CLAUSILIIDAE)
- crassilabra, Sioliella crassilabra (T.A. Conrad, 1871 †) - (COCHLIOPIDAE) (FOSSIL)
- crassilabra, Acanthina crassilabra J.B.P.A. Lamarck, 1816 - syn of: Acanthina unicornis (J.G. Bruguière, 1789) - (MURICIDAE)
- crassilabra, Plochelaea crassilabra W.M. Gabb, 1872 † - (NEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- crassilabra, Gregoia crassilabra Fehse, 2017 - (TRIVIIDAE)
- crassilabrata, Elachisina crassilabrata B.M. Landau, F. Da Silva & S.M. Heitz, 2016 † - (ELACHISINIDAE) (FOSSIL)
- Crassilabriana, syn of: Subgenus Cochlostoma (Obscurella) S. Clessin, 1889 (COCHLOSTOMATIDAE)
- crassilabris, Leucotaenius crassilabris (J.E. Gray, 1834) - (ACAVIDAE)
- crassilabris, Agardhia crassilabris A.V. Grossu & A. Negrea, 1968 - (ARGNIDAE)
- crassilabris, Cerion crassilabris G.B. Sowerby, 1875 - (CERIONIDAE)
- crassilabris, Grandinenia crassilabris H. Nordsieck, 2016 - (CLAUSILIIDAE)
- crassilabris, Montenegrina janinensis crassilabris W.A. Fauer, 1993 - (CLAUSILIIDAE)
- crassilabris, Semirugata bilabiata crassilabris (E.A. Rossmässler, 1836) - (CLAUSILIIDAE)
- crassilabris, Alopia livida crassilabris A.V. Grossu - (CLAUSILIIDAE)
- crassilabris, Obscurella crassilabris P. Fagot - syn of: Cochlostoma obscurum (J.P.R. Draparnaud, 1801) - (COCHLOSTOMATIDAE)
- crassilabris, Anachis crassilabris L.A. Reeve, 1859 - syn of: Parvanachis obesa (C.B. Adams, 1845) - (COLUMBELLIDAE)
- crassilabris, Arinia cylindrica crassilabris J.J. Vermeulen, 1996 - (DIPLOMMATINIDAE)
- crassilabris, Atys crassilabris (K.H.J. Thiele, 1925) - (HAMINOEIDAE)
- crassilabris, Ogasawarana crassilabris (R.A. Philippi, 1847) - (HELICINIDAE)
- crassilabris, Peringia crassilabris (G.P. Deshayes, 1862 †) - (HYDROBIIDAE) (FOSSIL)
- crassilabris, Leiostyla crassilabris B. Hausdorf, 1990 - (LAURIIDAE)
- crassilabris, Somatogyrus crassilabris B. Walker, 1915 - (LITHOGLYPHIDAE)
- crassilabris, Partula crassilabris W.H. Pease, 1866 - (PARTULIDAE)
- crassilabris, Planorbis crassilabris C.L.F. von Sandberger, 1875 † - (PLANORBIDAE) (FOSSIL)
- crassilabris, Planorbula crassilabris (B. Walker) - (PLANORBIDAE)
- crassilabris, Menetus cooperi crassilabris H.B. Baker, 1945 - (PLANORBIDAE)
- crassilabris, Holandriana crassilabris (J.R. Bourguignat, 1884) - (PLEUROCERIDAE)
- crassilabris, Melanella crassilabris J.R. Bourguignat, 1884 - syn of: Holandriana crassilabris (J.R. Bourguignat, 1884) - (PLEUROCERIDAE)
- crassilabris, Annularita majuscula crassilabris (C. de la Torre & P. Bartsch, 1941) - (POMATIIDAE)
- crassilabris, Bellardiella crassilabris O.F. von Möllendorff, 1899 - (PUPINIDAE)
- crassilabris, Notharinia crassilabris J.J. Vermeulen, L.C. Phung & Q.T. Truong, 2007 - (PUPINIDAE)
- crassilabris, Peringiella crassilabris R. Marquet, 1997 † - (RISSOIDAE) (FOSSIL)
- crassilabris, Rissoina crassilabris W.M. Gabb, 1873 † - (RISSOINIDAE) (FOSSIL)
- crassilabris, Malea crassilabris A. Valenciennes, 1832 - syn of: Malea ringens (W.J. Swainson, 1822) - (TONNIDAE)
- crassilabris, Anticlimax crassilabris (C.G. Aguayo & P.J. Borro, 1946) - (TORNIDAE)
- crassilabris, Poecilocoptis crassilabris (R. Arango, 1882) - (UROCOPTIDAE)
- crassilabris sallei, Cerion crassilabris sallei H.A. Pilsbry & E.G. Vanatta, 1896 - (CERIONIDAE)
- crassilabrum, Achatinella crassilabrum W. Newcomb - syn of: Amastra crassilabrum (W. Newcomb, 1854) - (ACHATINELLIDAE)
- crassilabrum, Amastra crassilabrum (W. Newcomb, 1854) - (AMASTRIDAE)
- crassilabrum, Callistocharis crassilabrum A. Garrett, 1872 - syn of: Placostylus gracilis (W.J. Broderip, 1840) - (BOTHRIEMBRYONTIDAE)
- crassilabrum, Bulimus crassilabrum A. Garrett, 1872 - syn of: Placostylus gracilis (W.J. Broderip, 1840) - (BULIMULIDAE)
- crassilabrum, Cerion crassilabrum G.B. Sowerby, 1875 - syn of: Cerion crassilabris G.B. Sowerby, 1875 - (CERIONIDAE)
- crassilabrum, Cerithium crassilabrum C.F.F. von Krauss, 1848 - (CERITHIIDAE)
- crassilabrum, Herpetopoma crassilabrum (G.B. III Sowerby, 1905) - (CHILODONTIDAE)
- crassilabrum, Granaria crassilabrum J.R. Bourguignat, 1864 - syn of: Abida braunii E.A. Rossmässler, 1842 - (CHONDRINIDAE)
- crassilabrum, Etrema crassilabrum (L.A. Reeve, 1843) - (CLATHURELLIDAE)
- crassilabrum, Chorrobius crassilabrum R. Hershler, H.P. Liu & J.J. Landye, 2011 - (COCHLIOPIDAE)
- crassilabrum, Cochlostoma crassilabrum (D. Dupuy, 1851) - (COCHLOSTOMATIDAE)
- crassilabrum, Strombina crassilabrum W.P. Woodring, 1928 † - (COLUMBELLIDAE) (FOSSIL)
- crassilabrum, Sincola crassilabrum (R.J.L. Guppy, 1874 †) - (COLUMBELLIDAE) (FOSSIL)
- crassilabrum, Cyamiocardium crassilabrum R.K. Dell, 1964 - (CYAMIIDAE)
- crassilabrum, Entomope crassilabrum S. Kiel, 2006 † - (ELACHISINIDAE) (FOSSIL)
- crassilabrum, Opalia crassilabrum (G.B. II Sowerby, 1844) - (EPITONIIDAE)
- crassilabrum, Mangelia crassilabrum L.A. Reeve, 1846 - syn of: Eucithara novaehollandiae (L.A. Reeve, 1846) - (MANGELIIDAE)
- crassilabrum, Prunum crassilabrum G.B. I Sowerby, 1846 - syn of: Prunum labrosum (J.H. Redfield, 1870) - (MARGINELLIDAE)
- crassilabrum, Cryptospira crassilabrum J.B.G.M. Bory De Saint-Vincent, 1827 - syn of: Cryptospira strigata (L.W. Dillwyn, 1817) - (MARGINELLIDAE)
- Crassilabrum, Genus Crassilabrum F.P. Jousseaume, 1880 (MURICIDAE)
- crassilabrum, Crassilabrum crassilabrum (Sowerby, 1834) - (MURICIDAE)
- crassilabrum, Purpura crassilabrum (G.B. I Sowerby, 1834) - syn of: Crassilabrum crassilabrum (Sowerby, 1834) - (MURICIDAE)
- crassilabrum, Monoceros crassilabrum J.B.P.A. Lamarck, 1816 - syn of: Acanthina unicornis (J.G. Bruguière, 1789) - (MURICIDAE)
- crassilabrum, Nerita crassilabrum E.A. Smith, 1885 - syn of: Theliostyla sanguinolenta marmorata L.A. Reeve, 1855 - (NERITIDAE)
- crassilabrum, Africanogyrus crassilabrum (P.M.A. Morelet, 1860) - (PLANORBIDAE)
- crassilabrum, Cerithidea crassilabrum A. Adams, 1855 - syn of: Cerithidea scalariformis (T. Say, 1825) - (POTAMIDIDAE)
- crassilabrum, Rimella crassilabrum G.P. Deshayes, 1835 † - (RIMELLIDAE) (FOSSIL)
- crassilabrum, Powellisetia crassilabrum (A.W.B. Powell, 1940) - (RISSOIDAE)
- crassilabrum, Rissoina crassilabrum (A. Garrett, 1857) - (RISSOINIDAE)
- crassilabrum, Rostellaria crassilabrum G.P. Deshayes, 1835 † - syn of: Rimella labrosa (G.B. I Sowerby, 1824 †) - (ROSTELLARIIDAE) (FOSSIL)
- crassilabrum, Scoliostoma crassilabrum C.L.F. von Sandberger & C.L.F. von Sandberger, 1854 † - (SCOLIOSTOMATIDAE) (FOSSIL)
- crassilabrum, Notosetia crassilabrum A.W.B. Powell, 1940 - syn of: Powellisetia crassilabrum (A.W.B. Powell, 1940) - (SEGUENZIOIDEA (unassigned))
- crassilabrum, Canarium crassilabrum H.E. Anton, 1838 - syn of: Canarium erythrinum L.W. Dillwyn, 1817 - (STROMBIDAE)
- crassilabrum, Pleurotoma crassilabrum L.A. Reeve, 1843 - syn of: Etrema crassilabrum (L.A. Reeve, 1843) - (TURRIDAE)
- crassilabrum, Leptoscapha crassilabrum R. Tate, 1889 † - (VOLUTIDAE) (FOSSIL)
- crassilabrum album, Acanthina crassilabrum album G.B. I Sowerby, 1835 - syn of: Acanthina unicornis (J.G. Bruguière, 1789) - (MURICIDAE)
- crassilabrum beta, Etrema crassilabrum beta C. Hedley, 1922 - (CLATHURELLIDAE)
- crassilabrum minutissimelirata, Etrema crassilabrum minutissimelirata J.L. Bouge & P. Dautzenberg, 1914 - syn of: Etrema minutissimelirata (J.L. Bouge & P. Dautzenberg, 1914) - (CLATHURELLIDAE)
- crassilabrum omninolirata, Etrema crassilabrum omninolirata (R.P.J. Hervier, 1896) - (CLATHURELLIDAE)
- crassilamellata, Thaumatoptyx crassilamellata J.T. Kuroda, 1941 - (CLAUSILIIDAE)
- Crassilina, Genus Crassilina Lyashenko, 1955 † (CRASSILINIDAE) (FOSSIL)
- crassilinea, Eopleurotoma crassilinea (F.E. Edwards, 1861 †) - (TURRIDAE) (FOSSIL)
- CRASSILINIDAE Lyashenko, 1955 † - Family (TENTACULITA-DACRYOCONARIDA [Subclass]-NOWAKIIDA [Order]) (FOSSIL)
- crassilirata, Clathurella crassilirata E.A. Smith, 1904 - (CLATHURELLIDAE)
- crassilirata, Collonista crassilirata (H.B. Preston, 1909) - (COLLONIIDAE)
- crassilirata, Cardiolucina crassilirata (R. Tate, 1887) - (LUCINIDAE)
- crassilirata, Mitromorpha crassilirata J.C. Verco, 1909 - (MITROMORPHIDAE)
- crassilirata, Gymnobela crassilirata A.V. Sysoev, 1990 - (RAPHITOMIDAE)
- crassilirata, Daphnella crassilirata H.H. Suter, 1908 - syn of: Minortrophon crassiliratus (H.H. Suter, 1908) - (RAPHITOMIDAE)
- crassiliratum, Globisinum crassiliratum Finlay, 1926 † - (NATICIDAE) (FOSSIL)
- crassiliratus, Minortrophon crassiliratus (H.H. Suter, 1908) - (MURICIDAE)
- crassiliratus, Ocenebra crassiliratus R. Tate, 1888 † - (MURICIDAE) (FOSSIL)
- crassiliratus, Terefundus crassiliratus H.H. Suter, 1908 - syn of: Minortrophon crassiliratus (H.H. Suter, 1908) - (MURICIDAE)
- Crassimarginata, Genus Crassimarginata Jhaveri, 1969 † (CRASSIMARGINATIDAE) (FOSSIL)
- CRASSIMARGINATIDAE Frýda, Blodgett & Lenz, 2002 † - Family (GASTROPODA-ORTHOGASTROPODA [Subclass]-MURCHISONIINA [Order]-LOXONEMATOIDEA [Superfamily]) (FOSSIL)
- crassimarginatus, Subvestinautilus crassimarginatus (Foord, 1900 †) - (KONINCKIOCERATIDAE) (FOSSIL)
- Crassimurex, Genus Crassimurex D. Merle, 1990 † (MURICIDAE) (FOSSIL)
- Crassimytilus, syn of: Genus Mytilus C. Linnaeus, 1758 (MYTILIDAE)
- Crassina, syn of: Genus Astarte J. de C. Sowerby, 1816 (ASTARTIDAE)
- crassina, Cominella crassina R. Tate, 1888 † - (BUCCINIDAE) (FOSSIL)
- crassina, Etrema crassina (G.F. Angas, 1880) - (CLATHURELLIDAE)
- crassina, Clathurella crassina G.F. Angas, 1880 - syn of: Etrema crassina (G.F. Angas, 1880) - (CLATHURELLIDAE)
- crassinatus, Prosocoelus crassinatus Solle, 1936 † - (PROSOCOELIDAE) (FOSSIL)
- Crassinella, Genus Crassinella R.J.L. Guppy, 1874 (CRASSATELLIDAE)
- crassinoda, Porcellia crassinoda White & R.P. Whitfield, 1862 † - (PORCELLIIDAE) (FOSSIL)
- crassinoda, Pleurofusia crassinoda (C. des Moulins, 1842 †) - (TURRIDAE) (FOSSIL)
- crassinoda, Pleurotoma crassinoda C. des Moulins, 1842 † - syn of: Pleurofusia crassinoda (C. des Moulins, 1842 †) - (TURRIDAE) (FOSSIL)
- crassinodosa, Cominella crassinodosa J. Marwick, 1931 † - (BUCCINIDAE) (FOSSIL)
- crassinodosum, Glottoceras crassinodosum Sommermeier, 1910 † - (KNEMICERATIDAE) (FOSSIL)
- crassinuda, Sonninia crassinuda Buckman † - (SONNINIIDAE) (FOSSIL)
- crassiolatum, Cyclostrema crassiolatum H. Strebel, 1908 - (LIOTIIDAE)
- crassior, Sellanarcestes crassior Walliser, 1965 † - (ANARCESTIDAE) (FOSSIL)
- crassior, Chauvetia crassior (N.H. Odhner, 1932) - (BUCCINIDAE)
- crassior, Lacuna crassior (G. Montagu, 1803) - (LITTORINIDAE)
- crassior, Ruedemannia crassior (J. Perner, 1903 †) - (LOPHOSPIRIDAE) (FOSSIL)
- crassior, Decorochilina crassior (J. Perner, 1903 †) - (SOLENISCIDAE) (FOSSIL)
- crassior, Macrochilina crassior J. Perner, 1903 † - syn of: Decorochilina crassior (J. Perner, 1903 †) - (SOLENISCIDAE) (FOSSIL)
- crassior, Turbo crassior G. Montagu, 1803 - syn of: Lacuna crassior (G. Montagu, 1803) - (TURBINIDAE)
- crassior, Schwartziella crassior (P. Dautzenberg, 1912) - (ZEBINIDAE)
- crassior glacialis, Lacuna crassior glacialis H.P.C. Møller, 1842 - syn of: Lacuna crassior (G. Montagu, 1803) - (LITTORINIDAE)
- crassiornatum, Yabeiceras crassiornatum J. Kennedy & Wright, 1983 † - (COLLIGNONICERATIDAE) (FOSSIL)
- crassiparva, Cotonopsis crassiparva P.O. Jung, 1989 - (COLUMBELLIDAE)
- crassiparva, Nuculana crassiparva † - (NUCULANIDAE) (FOSSIL)
- Crassiplanulites, Genus Crassiplanulites Buckman, 1921 † (PERISPHINCTIDAE) (FOSSIL)
- crassiplica, Acteocina crassiplica (T.A. Conrad, 1848 †) - (ACTEOCINIDAE) (FOSSIL)
- crassiplica, Caestocorbula crassiplica (W.M. Gabb, 1860 †) - (CORBULIDAE) (FOSSIL)
- crassiplica, Corbula crassiplica W.M. Gabb, 1860 † - (CORBULIDAE) (FOSSIL)
- crassiplica, Lutraria crassiplica J.B.P.A. Lamarck, 1818 - syn of: Clementia papyracea (J.F. Gmelin, 1791) - (MACTRIDAE)
- crassiplica involuta, Acteocina crassiplica involuta McNeil, 1984 † - (ACTEOCINIDAE) (FOSSIL)
- crassiplicata, Splendrillia crassiplicata (J.T. Kuroda, T. Habe & K. Oyama, 1971) - (DRILLIIDAE)
- crassiplicata, Kilianella crassiplicata (Stanton, 1895 †) - (NEOCOMITIDAE) (FOSSIL)
- crassiplicata, Monilispira crassiplicata J.T. Kuroda, T. Habe & K. Oyama, 1971 - syn of: Splendrillia crassiplicata (J.T. Kuroda, T. Habe & K. Oyama, 1971) - (PSEUDOMELATOMIDAE)
- crassiplicata, Odostomia crassiplicata S. Nomura, 1936 - (PYRAMIDELLIDAE)
- crassiplicata, Tellina crassiplicata W.H. Dall, P. Bartsch & H.A. Rehder, 1938 - (TELLINIDAE)
- crassiplicata, Glyptotoma crassiplicata W.M. Gabb, 1860 † - (TURRIDAE) (FOSSIL)
- crassiplicatus, Fusinus crassiplicatus T. Kira, 1959 - (FASCIOLARIIDAE)
- crassipupa, Plectostoma crassipupa (W.S.S. Van Benthem-Jutting, 1952) - (DIPLOMMATINIDAE)
- crassiquama, Spondylus crassiquama J.B.P.A. Lamarck, 1819 - syn of: Spondylus crassisquama J.B.P.A. Lamarck, 1819 - (SPONDYLIDAE)
- crassiradiatum, Scutus crassiradiatum A.E.M. Cossmann, 1903 † - (FISSURELLIDAE) (FOSSIL)
- crassiradiatus, Argopecten crassiradiatus Clark, 1915 † - (PECTINIDAE) (FOSSIL)
- crassireticula, Terebra crassireticula L.R.L. Simone, 1999 - (TEREBRIDAE)
- crassiruga, Proplanulites crassiruga (Buckman) † - (PERISPHINCTIDAE) (FOSSIL)
- Crassiscala, Subgenus Opalia (Crassiscala) De Boury, 1887 † (EPITONIIDAE) (FOSSIL)
- crassiscula, Paphia crassiscula J.B.P.A. Lamarck, 1818 - syn of: Paphia crassisulca (J.B.P.A. Lamarck, 1818) - (VENERIDAE)
- crassisculpta, Crassacuna crassisculpta P.U. Middelfart, 2002 - (CONDYLOCARDIIDAE)
- crassisculpta, Guerichina infundibulum crassisculpta Alberti, 2000 † - (PENEAUIIDAE) (FOSSIL)
- crassisculptus, Cantharus crassisculptus (A.H.E. Beyrich, 1856 ) - (BUCCINIDAE)
- crassisculptus, Fusinus crassisculptus (A.H.E. Beyrich, 1856 †) - (FASCIOLARIIDAE) (FOSSIL)
- crassisinuatus, Nautilus crassisinuatus Crick, 1898 † - syn of: Pseudaganides crassisinuatus (Crick, 1898 †) - (NAUTILIDAE) (FOSSIL)
- crassisinuatus, Pseudaganides crassisinuatus (Crick, 1898 †) - (PSEUDONAUTILIDAE) (FOSSIL)
- crassispina, Paracrioceras crassispina (A. von Koenen, 1902) - (ANCYLOCERATIDAE)
- crassispina, Crioceras crassispina A. von Koenen, 1902 - syn of: Paracrioceras crassispina (A. von Koenen, 1902) - (CRIOCERATITIDAE)
- crassispina, Murex crassispina J.B.P.A. Lamarck, 1822 - syn of: Murex scolopax L.W. Dillwyn, 1817 - (MURICIDAE)
- crassispinosus, Aviculopecten crassispinosus Chronic, 1949 † - syn of: Cassianoides crassispinosus (Chronic, 1949 †) - (AVICULOPECTINIDAE) (FOSSIL)
- crassispinosus, Cassianoides crassispinosus (Chronic, 1949 †) - (HETEROPECTINIDAE) (FOSSIL)
- crassispinus, Canopoconus crassispinus Yü, 1979 † - syn of: Xiadongoconus luminosus Yü, 1979 † - (MAIKHANELLIDAE) (FOSSIL)
- crassispira, Planaxis crassispira E.A. Smith, 1872 - (PLANAXIDAE)
- Crassispira, Genus Crassispira W.J. Swainson, 1840 (PSEUDOMELATOMIDAE)
- crassispiralis, Turehua crassispiralis A.G. Beu & P.A. Maxwell, 1987 † - (CANCELLARIIDAE) (FOSSIL)
- crassispiralis, Cryptomella crassispiralis J. Marwick, 1929 † - (CLATHURELLIDAE) (FOSSIL)
- crassispiralis, Nassarius tumidus crassispiralis Voorthuysen, 1944 † - (NASSARIIDAE) (FOSSIL)
- crassispiralis, Bellamya crassispiralis T.N. Annandale, 1921 - (VIVIPARIDAE)
- Crassispirella, syn of: Genus Crassispira W.J. Swainson, 1840 (PSEUDOMELATOMIDAE)
- crassisquama, Spondylus crassisquama J.B.P.A. Lamarck, 1819 - (SPONDYLIDAE)
- crassisquama basilicus, Spondylus crassisquama basilicus L.A. Reeve, 1856 - (SPONDYLIDAE)
- crassisquama unicolor, Spondylus crassisquama unicolor G.B. II Sowerby, 1847 - syn of: Spondylus unicolor G.B. II Sowerby, 1847 - (SPONDYLIDAE)
- crassisquamata, Timoclea crassisquamata (B. Prashad, 1932) - (VENERIDAE)
- crassisquamatus, Spondylus crassisquamatus J.B.P.A. Lamarck, 1819 - syn of: Spondylus crassisquama J.B.P.A. Lamarck, 1819 - (SPONDYLIDAE)
- crassissima, Scapharca crassissima O. Macsotay & B. Campos, 2001 - (ARCIDAE)
- crassissima, Cardinia crassissima (A.E.R. Agassiz, 1846 †) - (CARDINIIDAE) (FOSSIL)
- crassissima, Zittelia crassissima C.A. von Zittel, 1873 † - (COLOMBELLINIDAE) (FOSSIL)
- crassissima, Modiolus crassissima J.B.M. Dana, 1847 † - syn of: Merismopteria imbricata (J.B.M. Dana, 1847 †) - (MYTILIDAE) (FOSSIL)
- crassissima, Pleuroclymenia crassissima Schindewolf, 1955 † - syn of: Pleuroclymenia costata (C.N. Lange, 1929 †) - (PLATYCLYMENIIDAE) (FOSSIL)
- crassissima, Merelina crassissima A.W.B. Powell, 1937 - (RISSOIDAE)
- crassissimus, Limax crassissimus Jooss, 1902 † - (LIMACIDAE) (FOSSIL)
- crassissimus, Unio crassissimus S.C.T. Hanley, 1843 - syn of: Unio crassus L. Philipsson in A. Retzius, 1788 - (UNIONIDAE)
- crassistoma, Acicula crassistoma Stworzewicz & Soltys, 1996 † - (ACICULIDAE) (FOSSIL)
- crassistria, Ficus crassistria A. von Koenen, 1891 † - (FICIDAE) (FOSSIL)
- crassistriata, Cancellaria crassistriata Wood, 1879 † - (CANCELLARIIDAE) (FOSSIL)
- crassistriata, Ancylastrum crassistriata H.B. Preston, 1911 - (PLANORBIDAE)
- crassistriatum, Prionoceras crassistriatum (Gümbel, 1862 †) - (PRIONOCERATIDAE) (FOSSIL)
- crassistriatus, Delectopecten crassistriatus A.G. Beu & T.A. Darragh, 2001 - (PECTINIDAE)
- crassisulca, Paphia crassisulca (J.B.P.A. Lamarck, 1818) - (VENERIDAE)
- crassisulca, Paphia crassisulca K.L. Lamprell & T. Whitehead, 1992 - syn of: Paphia inflata (G.P. Deshayes, 1853) - (VENERIDAE)
- crassisulca, Venus crassisulca J.B.P.A. Lamarck, 1818 - syn of: Paphia crassisulca (J.B.P.A. Lamarck, 1818) - (VENERIDAE)
- crassitesta, Assiminea crassitesta O. Böttger, 1893 - (ASSIMINEIDAE)
- crassitesta, Parafossarulus crassitesta (C. Brömme, 1883 †) - (BITHYNIIDAE) (FOSSIL)
- crassitesta, Synprosphyma babeensis crassitesta H. Nordsieck, 2011 - (CLAUSILIIDAE)
- crassitesta, Iotrigonia crassitesta van Hoepen, 1929 † - (IOTRIGONIIDAE) (FOSSIL)
- crassitesta, Arthritica crassitesta C.R. Laws, 1950 † - (LASAEIDAE) (FOSSIL)
- crassitesta, Limacus crassitesta (A.E. Reuss, 1868 †) - (LIMACIDAE) (FOSSIL)
- crassitesta, Spisula crassitesta (Finlay, 1927 †) - (MACTRIDAE) (FOSSIL)
- crassitesta, Melanopsis crassitesta Blanckenhorn, 1897 † - (MELANOPSIDAE) (FOSSIL)
- crassitesta, Mytilus crassitesta C.E. Lischke, 1868 - syn of: Mytilus coruscus A.A. Gould, 1861 - (MYTILIDAE)
- crassitesta, Cristariopsis crassitesta I.M. Moskvicheva, 1973 - syn of: Sinanodonta woodiana (I. Lea, 1834) - (UNIONIDAE)
- Crassitesta, syn of: Genus Cristaria H.C.F. Schumacher, 1817 (UNIONIDAE)
- crassitesta, Chione crassitesta H.J. Finlay, 1924 - syn of: Austrovenus stutchburyi (W. Wood, 1828) - (VENERIDAE)
- crassitesta, Phenacolimax crassitesta (A. Andreae, 1902 †) - (VITRINIDAE) (FOSSIL)
- Crassithracia, syn of: Genus Thracia W.E. Leach in H.M.D. De Blainville, 1824 (THRACIIDAE)
- Crassitoniella, Genus Crassitoniella W.F. Ponder, 1965 (EATONIELLIDAE)
- crassituberosus, Potamides crassituberosus A.E.M. Cossmann & G. Pissarro, 1900 † - (POTAMIDIDAE) (FOSSIL)
- Crassitudochiton, Genus Crassitudochiton Hoare & Karasawa, 2008 † (CRASSITUDOCHITONIDAE) (FOSSIL)
- CRASSITUDOCHITONIDAE Hoare & Karasawa, 2008 † - Family (POLYPLACOPHORA-NEOLORICATA [Subclass]) (FOSSIL)
- crassiuscula, Megalomphala crassiuscula E.F.R.K. Koken, 1897 † - (BUCANIIDAE) (FOSSIL)
- crassiuscula, Calyptraea crassiuscula J.P.S. Grateloup, 1827 † - (CALYPTRAEIDAE) (FOSSIL)
- crassiuscula, Landouria winteriana crassiuscula G.A. Solem - (CAMAENIDAE)
- crassiuscula, Cardinia crassiuscula A.E.R. Agassiz, 1846 † - (CARDINIIDAE) (FOSSIL)
- crassiuscula, Cassidula nucleus crassiuscula A. Mousson, 1869 - (ELLOBIIDAE)
- crassiuscula, Eulima crassiuscula R.W. Dunker, 1887 - (EULIMIDAE)
- crassiuscula, Fluviopupa crassiuscula (G.R. von Frauenfeld, 1863) - (HYDROBIIDAE)
- crassiuscula, Actinella crassiuscula (T.D.A. Cockerell, 1921) - (HYGROMIIDAE)
- crassiuscula, Kellia crassiuscula E.A. Smith, 1890 - (KELLIIDAE)
- crassiuscula, Lithoglyphus crassiuscula G.R. von Frauenfeld, 1863 - syn of: Fluviopupa crassiuscula (G.R. von Frauenfeld, 1863) - (LITHOGLYPHIDAE)
- crassiuscula, Gonimyrtea crassiuscula M. Yokoyama, 1927 - (LUCINIDAE)
- crassiuscula, Nassaria crassiuscula (L.M.D. Bellardi, 1882 †) - (NASSARIIDAE) (FOSSIL)
- crassiuscula, Natica crassiuscula J.P.S. Grateloup, 1847 † - (NATICIDAE) (FOSSIL)
- crassiuscula, Wrightudora crassiuscula (C. de la Torre & P. Bartsch, 1941) - (POMATIIDAE)
- crassiuscula, Abra crassiuscula M. Yokoyama, 1927 - (SEMELIDAE)
- crassiuscula, Gongylostoma hilleiana crassiuscula C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- crassiuscula, Peruluta crassiuscula (Woods, 1922 †) - (VOLUTIDAE) (FOSSIL)
- crassiuscula vitensis, Auricula crassiuscula vitensis A. Mousson, 1869 - syn of: Cassidula nucleus vitensis (A. Mousson, 1869) - (ELLOBIIDAE)
- crassiusculosum, Dactylioceras crassiusculosum (C.T. Simpson, 1855 †) - (DACTYLIOCERATIDAE) (FOSSIL)
- crassiusculum, Cerion crassiusculum C. de la Torre in H.A. Pilsbry & E.G. Vanatta, 1899 - (CERIONIDAE)
- crassiusculum, Dactylioceras crassiusculum C.T. Simpson, 1855 † - (DACTYLIOCERATIDAE) (FOSSIL)
- crassiusculum smithi, Cerion crassiusculum smithi Blanes in H.A. Pilsbry, 1902 - (CERIONIDAE)
- crassivaricosa, Murex crassivaricosa L.A. Reeve, 1845 - syn of: Chicoreus brevifrons (J.B.P.A. Lamarck, 1822) - (MURICIDAE)
- crassivaricosa, Otitoma crassivaricosa Morassi, Nappo & Bonfitto, 2017 - (PSEUDOMELATOMIDAE)
- crassivenium, Gloripallium crassivenium (Yokoyama, 1929 †) - (PECTINIDAE) (FOSSIL)
- crassiventer, Granaria crassiventer Salvador, Höltke, Rasser & Kadolsky, 2013 † - (CHONDRINIDAE) (FOSSIL)
- crassiventris, Camaena mamilla crassiventris B. Rensch, 1933 - (CAMAENIDAE)
- crassiventris, Erycites crassiventris Merla, 1934 † - (HAMMATOCERATIDAE) (FOSSIL)
- Crassivenus, syn of: Genus Mercenaria H.C.F. Schumacher, 1817 (VENERIDAE)
- crassizigzag, Procerozigzag crassizigzag (Buckman) † - (PERISPHINCTIDAE) (FOSSIL)
- crassocingulata, Peyrotia magnasperula crassocingulata E.W. Vredenburg, 1928 † - (TURRITELLIDAE) (FOSSIL)
- crassodentatus, Mecynodon crassodentatus Karczewski, 1992 † - (MECYNODONTIDAE) (FOSSIL)
- Crassodoma, syn of: Genus Crassadoma F.R. Bernard, 1986 (PECTINIDAE)
- crassofalcatus horridus, Hyphoplites crassofalcatus horridus C.W. Wright & E.V. Wright, 1949 † - syn of: Hyphoplites curvatus arausionensis (Hébert & E.C. Munier-Chalmas, 1875 †) - (HOPLITIDAE) (FOSSIL)
- crassoides, Bellerophon crassoides Reed, 1925 † - (BELLEROPHONTIDAE) (FOSSIL)
- crassoides, Nodicoeloceras crassoides (C.T. Simpson, 1855 †) - (DACTYLIOCERATIDAE) (FOSSIL)
- crassoides, Maternoceras calculiformis crassoides (Matern, 1931 †) - (GEPHUROCERATIDAE) (FOSSIL)
- crassolare, Tremanotus crassolare (McChesney, 1861 †) - (BUCANIIDAE) (FOSSIL)
- Crassoleda, syn of: Genus Nuculana J.H.F. Link, 1807 (NUCULANIDAE)
- crassoperculata, Natica crassoperculata H.X. Liu, 1977 - (NATICIDAE)
- Crassopleura, Genus Crassopleura T.A. de M. Monterosato, 1884 (DRILLIIDAE)
- crassoradiata, Apiotrigonia crassoradiata T. Nakano, 1958 † - (MEGATRIGONIIDAE) (FOSSIL)
- crassornata, Pseudospatha crassornata Buckman, 1910 † - syn of: Bredyia subinsignis (Oppel, 1856 †) - (UNIONIDAE) (FOSSIL)
- Crassostrea, Genus Crassostrea F. Sacco, 1897 (OSTREIDAE)
- Crassotornoceras, Genus Crassotornoceras House & Price, 1985 † (TORNOCERATIDAE) (FOSSIL)
- Crassotrea, syn of: Genus Crassostrea F. Sacco, 1897 (OSTREIDAE)
- crassula, Auriculella crassula E.A. Smith, 1873 - (ACHATINELLIDAE)
- crassula, Chloritis crassula R.A. Philippi, 1844 - (CAMAENIDAE)
- crassula, Xerarionta levis crassula (W.H. Dall, 1900) - (CEPOLIDAE)
- crassula, Cochlicopa crassula P. Fagot, 1879 - syn of: Cochlicopa lubrica (O.F. Müller, 1774) - (COCHLICOPIDAE)
- crassula, Corbicula crassula L.M.D. Bellardi, 1854 - syn of: Corbicula fluminalis (O.F. Müller, 1774) - (CYRENIDAE)
- crassula, Umbilibalcis crassula P. Bouchet & A. Warén, 1986 - (EULIMIDAE)
- crassula, Hemiliostraca crassula (A. Adams, 1864) - (EULIMIDAE)
- crassula, Leiostraca crassula (J.G. Jeffreys, 1839) - (EULIMIDAE)
- crassula, Eulima crassula J.G. Jeffreys, 1839 - syn of: Leiostraca crassula (J.G. Jeffreys, 1839) - (EULIMIDAE)
- crassula, Limopsis crassula T. Habe, 1953 - (LIMOPSIDAE)
- Crassula, Genus Crassula J. Marwick, 1948 (MACTRIDAE)
- crassula, Mesodesma crassula L.A. Reeve, 1854 - syn of: Davila plana (S.C.T. Hanley, 1843) - (MESODESMATIDAE)
- crassula, Gari crassula (G.P. Deshayes, 1855) - (PSAMMOBIIDAE)
- crassula, Pyramidella crassula E. Forbes, 1843 - (PYRAMIDELLIDAE)
- crassula, Kermia crassula H.A. Rehder, 1980 - (RAPHITOMIDAE)
- crassula, Simulamerelina crassula (H.A. Rehder, 1980) - (RISSOIDAE)
- crassula, Manzonia crassula H.A. Rehder, 1980 - syn of: Simulamerelina crassula (H.A. Rehder, 1980) - (RISSOIDAE)
- crassula, Merelina crassula H.A. Rehder, 1980 - syn of: Simulamerelina crassula (H.A. Rehder, 1980) - (RISSOIDAE)
- crassula, Allopeas crassula (W.H. Benson, 1836) - (SUBULINIDAE)
- crassula, Macoma crassula (G.P. Deshayes, 1855) - (TELLINIDAE)
- crassula, Tellina crassula G.P. Deshayes, 1855 - syn of: Macoma crassula (G.P. Deshayes, 1855) - (TELLINIDAE)
- crassula, Terebra crassula G.P. Deshayes, 1859 - syn of: Hastula hastata (J.F. Gmelin, 1791) - (TEREBRIDAE)
- crassula, Hastula crassula G.P. Deshayes, 1859 - syn of: Hastula hastata (J.F. Gmelin, 1791) - (TEREBRIDAE)
- crassula, Mastonia crassula (E.C. Von Martens, 1880) - (TRIPHORIDAE)
- crassulnata, Ergalatax crassulnata (C. Hedley, 1915) - (MURICIDAE)
- Crassulobia, Subgenus Gari (Crassulobia) R.C. Willan, 1993 (PSAMMOBIIDAE)
- crassulosum, Dactylioceras crassulosum C.T. Simpson, 1855 † - (DACTYLIOCERATIDAE) (FOSSIL)
- crassulum, Campeloma crassulum C.S. Rafinesque, 1819 - (VIVIPARIDAE)
- crassulus, Microcondylus crassulus H. Drouët, 1879 - syn of: Microcondylaea compressa (K.T. Menke, 1830) - (UNIONIDAE)
- crassulus, Unio crassulus H. Drouët, 1888 - syn of: Unio arcuatus N.R. Bouchard-Chantereaux, 1838 - (UNIONIDAE)
- crassum, Microsulcatoceras crassum J. Kennedy & Cobban, 1990 † - (ACANTHOCERATIDAE) (FOSSIL)
- crassum, Aegasteroceras crassum Spath, 1925 † - (ARIETITIDAE) (FOSSIL)
- crassum, Salpingostoma crassum E.F.R.K. Koken & J. Perner, 1925 † - syn of: Salpingostoma megalostoma (d''Eichwald, 1840 †) - (BUCANIIDAE) (FOSSIL)
- crassum, Buccinum crassum J.F. Gmelin, 1791 - syn of: Pseudoliva crassa (J.F. Gmelin, 1791) - (BUCCINIDAE)
- crassum, Buccinum crassum R.A. Philippi, 1849 - syn of: Nassarius semisulcatus (J.B. Hombron & C.H. Jacquinot, 1848) - (BUCCINIDAE)
- crassum, Caecum crassum L. de Folin, 1870 - (CAECIDAE)
- crassum, Laevicardium crassum (J.F. Gmelin, 1791) - (CARDIIDAE)
- crassum, Cardium crassum J.F. Gmelin, 1791 - syn of: Laevicardium crassum (J.F. Gmelin, 1791) - (CARDIIDAE)
- crassum, Cardium crassum J.F. Gmelin, 1791 - syn of: Laevicardium crassum (J.F. Gmelin, 1791) - (CARDIIDAE)
- crassum, Cardium crassum K.E.I. von Eichwald, 1829 - syn of: Didacna baeri (O.A. Grimm, 1877) - (CARDIIDAE)
- crassum, Cheiloceras crassum Wedekind, 1918 † - (CHEILOCERATIDAE) (FOSSIL)
- crassum, Cravenoceras crassum Ruzhentsev & Bogoslovskaya, 1971 † - (CRAVENOCERATIDAE) (FOSSIL)
- crassum, Catacoeloceras crassum (A.T. Young & Bird, 1828 †) - (DACTYLIOCERATIDAE) (FOSSIL)
- crassum, Desmoceras crassum Van Hoepen, 1921 † - syn of: Desmophyllites diphylloides (E. Forbes, 1846 †) - (DESMOCERATIDAE) (FOSSIL)
- crassum, Opisthostoma crassum J.J. Vermeulen, 1994 - (DIPLOMMATINIDAE)
- crassum, Oxybeloceras crassum (R.P. Whitfield, 1877 †) - (DIPLOMOCERATIDAE) (FOSSIL)
- crassum, Cheloniceras crassum T.L. Casey, 1961 † - (DOUVILLEICERATIDAE) (FOSSIL)
- crassum, Carychium crassum Sacco, 1886 † - (ELLOBIIDAE) (FOSSIL)
- crassum, Fanninoceras crassum McLearn, 1932 † - (EODEROCERATIDAE) (FOSSIL)
- crassum, Epitonium crassum (G.B. II Sowerby, 1847) - (EPITONIIDAE)
- crassum, Acutimitoceras crassum (Ruan, 1981 †) - (GATTENDORFIIDAE) (FOSSIL)
- crassum, Sphaeromanticoceras crassum (Wedekind, 1913 †) - (GEPHUROCERATIDAE) (FOSSIL)
- crassum, Hildoceras crassum Mitzopoulos, 1930 † - (HILDOCERATIDAE) (FOSSIL)
- crassum, Mercaticeras crassum Guex, 1973 † - syn of: Hibolites hastatus (P.D. Montfort, 1808 †) - (HILDOCERATIDAE) (FOSSIL)
- crassum, Labeceras plasticum crassum Spath, 1925 † - (LABECERATIDAE) (FOSSIL)
- crassum, Beaniceras crassum Buckman, 1919 † - (LIPAROCERATIDAE) (FOSSIL)
- crassum, Maenioceras crassum Bensaid, 1974 † - syn of: Bensaidites crassus (Bensaid, 1974 †) - (MAENIOCERATIDAE) (FOSSIL)
- crassum, Farcimen bituberculatum crassum C. de la Torre & P. Bartsch, 1942 - (MEGALOMASTOMIDAE)
- crassum, Melagathiceras crassum (Tozer, 1961 †) - (MELAGATHICERATIDAE) (FOSSIL)
- crassum, Eolepton crassum (M. Yokoyama, 1927) - (MONTACUTIDAE)
- crassum, Pachyrisma crassum Dubbers, 1888 † - (PACHYRISMATIDAE) (FOSSIL)
- crassum, Phyllopachyceras crassum Druschtschitz, 1956 † - syn of: Phyllopachyceras baborense (Coquand, 1880 †) - (PHYLLOCERATIDAE) (FOSSIL)
- crassum, Platyceras crassum J.W. Hall, 1862 † - (PLATYCERATIDAE) (FOSSIL)
- crassum, Terebralia crassum J.B.P.A. Lamarck, 1822 - syn of: Terebralia palustris (C. Linnaeus, 1767) - (POTAMIDIDAE)
- crassum, Imitoceras crassum Ruan, 1981 † - syn of: Acutimitoceras crassum (Ruan, 1981 †) - (PRIONOCERATIDAE) (FOSSIL)
- crassum, Claviderma crassum D. Ivanov & A.H. Scheltema, 2008 - (PROCHAETODERMATIDAE)
- crassum, Probatoceras crassum P.A. Zhuravleva, 1978 † - (PSEUDORTHOCERATIDAE) (FOSSIL)
- crassum, Sphaerium crassum V. Sterki, 1901 - syn of: Sphaerium simile T. Say, 1817 - (SPHAERIIDAE)
- crassum, Strioterebrum crassum (R. Tate, 1886 †) - (TEREBRIDAE) (FOSSIL)
- crassum, Crassotornoceras crassum (Matern, 1931 †) - (TORNOCERATIDAE) (FOSSIL)
- crassum, Wichitoceras crassum Ulrich & al., 1942 † - (TROCHOLITIDAE) (FOSSIL)
- crassum, Vascoceras crassum Furon, 1935 † - (VASCOCERATIDAE) (FOSSIL)
- crassum, Paravascoceras crassum Chudeau, 1909 † - syn of: Paravascoceras cauvini (Chudeau, 1909 †) - (VASCOCERATIDAE) (FOSSIL)
- crassum, Hyphantosoma crassum B.K. Raines & M. Huber, 2012 - (VENERIDAE)
- crassum impar, Cheloniceras crassum impar T.L. Casey, 1961 † - (DOUVILLEICERATIDAE) (FOSSIL)
- crassum mediterraneum, Laevicardium crassum mediterraneum M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1892 - syn of: Laevicardium crassum (J.F. Gmelin, 1791) - (CARDIIDAE)
- Crassunio, Genus Crassunio Modell, 1964 (UNIONIDAE)
- crassus, Pascoeites crassus Spath, 1933 † - (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- crassus, Arctica crassus E.M. Da Costa, 1778 - syn of: Arctica islandica (C. Linnaeus, 1767) - (ARCTICIDAE)
- crassus, Brayardites crassus Brühwiler & al., 2010 † - (ARCTOCERATIDAE) (FOSSIL)
- crassus, Bellerophon crassus F.B. Meek & A.H. Worthen, 1860 † - (BELLEROPHONTIDAE) (FOSSIL)
- crassus, Placostylus fibratus crassus E.L. Layard in W. Kobelt, 1891 - (BOTHRIEMBRYONTIDAE)
- crassus, Penion crassus D. Frassinetti, 2000 † - (BUCCINIDAE) (FOSSIL)
- crassus, Phyllocladiscites crassus (J. Von Hauer, 1887 †) - (CLADISCITIDAE) (FOSSIL)
- crassus, Clypeoceras crassus Krafft, 1909 † - syn of: Proptychites alterammonoides (Krafft, 1909 †) - (CLYPEOCERATIDAE) (FOSSIL)
- crassus, Onobops crassus (F.G. Thompson, 1968) - (COCHLIOPIDAE)
- crassus, Conus crassus G.B. II Sowerby, 1858 - syn of: Tesselliconus eburneus (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- crassus, Cyclophorus crassus (L. Pfeiffer, 1861) - (CYCLOPHORIDAE)
- crassus, Episculites crassus Tozer, 1994 † - (EPISCULITIDAE) (FOSSIL)
- crassus, Warthia crassus E.L. Yochelson, 1960 † - (EUPHEMITIDAE) (FOSSIL)
- crassus, Latirus crassus (E. Sismonda, 1842 †) - (FASCIOLARIIDAE) (FOSSIL)
- crassus, Fusus crassus R.A. Philippi, 1887 † - syn of: Memorabiliglobus philippii C. Nielsen, 2003 † - (FASCIOLARIIDAE) (FOSSIL)
- crassus, Fusus crassus P.M. Pallary, 1901 - syn of: Fusinus cretellai G. Buzzurro & P. Russo, 2008 - (FASCIOLARIIDAE)
- crassus, Goniatites crassus Holzapfel, 1895 † - syn of: Agoniatites costulatus (d'Archiac & de Verneuil, 1842 †) - (GONIATITIDAE) (FOSSIL)
- crassus, Hildaites crassus Guex, 1973 † - (HILDOCERATIDAE) (FOSSIL)
- crassus, Homoctenus crassus Li, 1995 † - (HOMOCTENIDAE) (FOSSIL)
- crassus, Ischnochiton crassus P. Kaas, 1985 - (ISCHNOCHITONIDAE)
- crassus, Moffitites crassus Imlay, 1960 † - (KOSSMATICERATIDAE) (FOSSIL)
- crassus, Arthrophyllum crassus (F.A. Roemer, 1844 †) - (LAMELLORTHOCERATIDAE) (FOSSIL)
- crassus, Lecanites crassus Smith, 1914 † - syn of: Aplococeras vogdesi A. Hyatt & Smith, 1905 † - (LECANITIDAE) (FOSSIL)
- crassus, Bensaidites crassus (Bensaid, 1974 †) - (MAENIOCERATIDAE) (FOSSIL)
- crassus, Mangelia crassus T. Brown, 1827 - syn of: Mangelia costata (T. Pennant, 1777) - (MANGELIIDAE)
- crassus, Megalobulimus crassus (J.A. Albers, 1850) - (MEGALOBULIMIDAE)
- crassus, Pyrifusus crassus N.F. Sohl, 1964 † - (MELONGENIDAE) (FOSSIL)
- crassus, Milax crassus (Clessin, 1894) † - (MILACIDAE) (FOSSIL)
- crassus, Murex crassus L.W. Dillwyn, 1817 - syn of: Marsupina bufo (J.G. Bruguière, 1792) - (MURICIDAE)
- crassus, Murex crassus A. Adams, 1853 - syn of: Ocenebra inornata (C.A. Récluz, 1851) - (MURICIDAE)
- crassus, Septifer crassus R.W. Dunker, 1853 - syn of: Septifer virgatus (A.F.A.H. Wiegmann, 1837) - (MYTILIDAE)
- crassus, Mytilus crassus J.E. Tenison-Woods, 1877 - syn of: Limnoperna pulex (J.B.P.A. Lamarck, 1819) - (MYTILIDAE)
- crassus, Naiadites crassus Fleming † - (NAIADITIDAE) (FOSSIL)
- crassus, Phos crassus R.B. Hinds, 1843 - (NASSARIIDAE)
- crassus, Phrontis crassus R.A. Philippi, 1849 - syn of: Nassarius semisulcatus (J.B. Hombron & C.H. Jacquinot, 1848) - (NASSARIIDAE)
- crassus, Nassarius crassus R.A. Philippi, 1849 - syn of: Nassarius semisulcatus (J.B. Hombron & C.H. Jacquinot, 1848) - (NASSARIIDAE)
- crassus, Chesapecten crassus del Rio, 1992 † - syn of: Chesapecten patagonensis (A.V.M.D. D'Orbigny, 1842 †) - (PECTINIDAE) (FOSSIL)
- crassus, Dichotomoceras crassus Enay, 1966 † - (PERISPHINCTIDAE) (FOSSIL)
- crassus, Anisus crassus (E.M. Da Costa, 1778) - (PLANORBIDAE)
- crassus, Gyraulus crassus G. Mandahl-Barth, 1954 - (PLANORBIDAE)
- crassus, Planorbarius crassus (P.M.T. de Serres, 1844 †) - (PLANORBIDAE) (FOSSIL)
- crassus, Lithasiopsis crassus F.G. Thompson, 1959 - (PLEUROCERIDAE)
- crassus, Prodichotomites crassus (Kemper, 1978 †) - (POLYPTYCHITIDAE) (FOSSIL)
- crassus, Pyrgiscus crassus E. Saurin, 1959 - (PYRAMIDELLIDAE)
- crassus, Jeletzkytes crassus (Coryell & E.S. Salmon, 1934 †) - (SCAPHITIDAE) (FOSSIL)
- crassus, Iniskinites crassus Riccardi & Westermann, 1991 † - (SPHAEROCERATIDAE) (FOSSIL)
- crassus, Technophorus crassus (Thoral, 1935 †) - (TECHNOPHORIDAE) (FOSSIL)
- crassus, Trochus crassus R. Pulteney, 1799 - syn of: Phorcus lineatus (E.M. Da Costa, 1778) - (TROCHIDAE)
- crassus, Turbo crassus W. Wood, 1828 - (TURBINIDAE)
- crassus, Turbo crassus F. Kanmacher, 1798 - syn of: Manzonia crassa (F. Kanmacher, 1798) - (TURBINIDAE)
- crassus, Unio crassus L. Philipsson in A. Retzius, 1788 - (UNIONIDAE)
- crassus, Pseudodon crassus H. Drouët & M.A. Chaper, 1892 - (UNIONIDAE)
- crassus, Microcondylus crassus F. Haas, 1940 - syn of: Microcondylaea compressa (K.T. Menke, 1830) - (UNIONIDAE)
- crassus, Anodon crassus W.J. Swainson, 1823 - syn of: Anodontites patagonica J.B.P.A. Lamarck, 1819 - (UNIONIDAE)
- crassus, Coscaites crassus Guex & al., 2005 † - (USSURITIDAE) (FOSSIL)
- crassus, Eophyllites crassus Wang & He, 1976 † - (USSURITIDAE) (FOSSIL)
- crassus, Neoptychites crassus Solger, 1904 † - (VASCOCERATIDAE) (FOSSIL)
- crassus, Madeirovitrina crassus (K. Groh & J. Hemmen, 1996) - (VITRINIDAE)
- crassus batavus, Unio crassus batavus (W.G. Maton & T. Rackett, 1807) - (UNIONIDAE)
- crassus clarki, Phos crassus clarki (M. Smith, 1944) - (NASSARIIDAE)
- crassus giganteus, Unio crassus giganteus D.W. Barnes, 1823 - syn of: Magnonaias nervosa (C.S. Rafinesque, 1820) - (UNIONIDAE)
- crassus jonicus, Unio crassus jonicus H. Drouët, 1879 - (UNIONIDAE)
- crassus minor, Fusus crassus minor P.M. Pallary, 1920 - syn of: Fusinus cretellai G. Buzzurro & P. Russo, 2008 - (FASCIOLARIIDAE)
- crassus nanus, Unio crassus nanus (J.B.P.A. Lamarck, 1810) - (UNIONIDAE)
- crassus vindobonensis, Latirus crassus vindobonensis M. Csepreghy, 1956 † - (FASCIOLARIIDAE) (FOSSIL)
- crastina, Melanopsis crastina E. Vidal, 1874 † - (MELANOPSIDAE) (FOSSIL)
- crataegus, Abbottella crataegus Watters, 2016 - (POMATIIDAE)
- Cratena, Genus Cratena L.S.R. Bergh, 1864 (FACELINIDAE)
- Cratenopis, syn of: Genus Cuthona J. Alder & A. Hancock, 1855 (FIONIDAE)
- Cratenopsis, Genus Cratenopsis H.M. Lemche, 1936 † (FIONIDAE) (FOSSIL)
- crater, Zegalerus crater H.J. Finlay, 1926 † - syn of: Sigapatella terraenovae A.J. Peile, 1924 † - (CALYPTRAEIDAE) (FOSSIL)
- crater, Mandaloceras crater (C.H. Blake †) - (MANDALOCERATIDAE) (FOSSIL)
- Cratera, syn of: Genus Discus L.I. Fitzinger, 1833 (DISCIDAE)
- cratera, Cerodrillia cratera (W.H. Dall, 1927) - (DRILLIIDAE)
- cratera, Mangelia cratera W.H. Dall, 1927 - syn of: Cerodrillia cratera (W.H. Dall, 1927) - (MANGELIIDAE)
- cratera, Anticlimax hispaniolensis cratera H.A. Pilsbry & A.A. Olsson, 1950 - (TORNIDAE)
- Cratere, syn of: Genus Pyramidula L.I. Fitzinger, 1833 (PYRAMIDULIDAE)
- craterella, Valvata craterella H.D. Russell, 1938 † - (VALVATIDAE) (FOSSIL)
- cratericula, Cystiscus cratericula (R. Tate & W.L. May, 1900) - (CYSTISCIDAE)
- cratericulatus, Maxacteon cratericulatus (C. Hedley, 1906) - (ACTEONIDAE)
- cratericulus, Stephopoma cratericulus R. Tate, 1893 † - (VERMETIDAE) (FOSSIL)
- crateriforme, Nodicoeloceras crateriforme Monestier, 1931 † - (DACTYLIOCERATIDAE) (FOSSIL)
- crateriformis, Euomphalus crateriformis Koninck † - (EUOMPHALIDAE) (FOSSIL)
- crateriformis, Patella crateriformis E.A.L. Kittl, 1894 † - (PATELLIDAE) (FOSSIL)
- crateriformis, Lapeirousia crateriformis C. des Moulins † - (RADIOLITIDAE) (FOSSIL)
- crateris, Pristiloma crateris H.A. Pilsbry, 1946 - (PRISTILOMATIDAE)
- Crateroceras, Genus Crateroceras Foerste & Savage, 1927 † (ACLEISTOCERATIDAE) (FOSSIL)
- Craterodiscus, Genus Craterodiscus D.F. McMichael, 1959 (CAMAENIDAE)
- craticula, Helix craticula R.T. Lowe, 1852 - syn of: Leptaxis nivosa craticulata R.T. Lowe, 1852 - (HELICIDAE)
- Craticula, Subgenus Leiostyla (Craticula) R.T. Lowe, 1852 (LAURIIDAE)
- craticula, Liralucina craticula E.A. Glover & D.W. Taylor, 2007 - (LUCINIDAE)
- craticula, Alvania craticula (Briart & Cornet, 1887 †) - (RISSOIDAE) (FOSSIL)
- craticula, Arcopagia craticula Sowerby, 1850 † - (TELLINIDAE) (FOSSIL)
- craticulata, Anadara craticulata (P. Nyst, 1848) - (ARCIDAE)
- craticulata, Arca craticulata P. Nyst, 1848 - syn of: Anadara craticulata (P. Nyst, 1848) - (ARCIDAE)
- craticulata, Chauvetia craticulata (O.A.L. Mörch, 1860) - (BUCCINIDAE)
- craticulata, Semicassis craticulata (F.M. Euthyme, 1885) - (CASSIDAE)
- craticulata, Leptaxis nivosa craticulata R.T. Lowe, 1852 - (HYGROMIIDAE)
- craticulata, Lepidozona craticulata (A.A. Gould, 1859) - (ISCHNOCHITONIDAE)
- craticulata, Hadriania craticulata (G.B. Brocchi, 1814) - (MURICIDAE)
- craticulata, Cellana craticulata (H.H. Suter, 1905) - (NACELLIDAE)
- craticulata, Dunkeria craticulata A. Adams, 1861 - (PYRAMIDELLIDAE)
- craticulata, Chrysallida craticulata (A. Issel, 1869) - (PYRAMIDELLIDAE)
- craticulata, Turbonilla craticulata O.A.L. Mörch, 1859 - (PYRAMIDELLIDAE)
- craticulata, Kleinella craticulata S.A. Renier, 1804 - syn of: Euparthenia bulinea (R.T. Lowe, 1841) - (PYRAMIDELLIDAE)
- craticulata, Turbinella craticulata J.B.P.A. Lamarck, 1829 - syn of: Pollia wagneri (H.E. Anton, 1838) - (TURBINELLIDAE)
- craticulata, Turbinella craticulata A. da Costa, 1829 - syn of: Pollia dorbignyi (B.C.M. Payraudeau, 1826) - (TURBINELLIDAE)
- craticulata, Lyria craticulata Darragh, 2017 † - (VOLUTIDAE) (FOSSIL)
- craticulatum, Buccinum craticulatum O. Fabricius, 1780 - syn of: Scabrotrophon fabricii (H.P.C. Møller, 1842) - (BUCCINIDAE)
- craticulatum, Phalium craticulatum F.M. Euthyme, 1885 - syn of: Semicassis craticulata (F.M. Euthyme, 1885) - (CASSIDAE)
- craticulatum, Bittium craticulatum A.A. Gould, 1860 - syn of: Bittium glareosum A.A. Gould, 1861 - (CERITHIIDAE)
- craticulatum, Trophon craticulatum O. Fabricius, 1780 - syn of: Scabrotrophon fabricii (H.P.C. Møller, 1842) - (MURICIDAE)
- craticulatus, Maxacteon craticulatus C. Hedley, 1906 - syn of: Maxacteon cratericulatus (C. Hedley, 1906) - (ACTEONIDAE)
- craticulatus, Sizilites craticulatus (C. Gemmellaro, 1888 †) - (ADRIANITIDAE) (FOSSIL)
- craticulatus, Turrilatirus craticulatus (C. Linnaeus, 1758) - (FASCIOLARIIDAE)
- craticulatus, Fusus craticulatus G.B. Brocchi, 1814 - (FASCIOLARIIDAE)
- craticulatus, Lepidozona craticulatus A.A. Gould, 1859 - syn of: Lepidozona craticulata (A.A. Gould, 1859) - (ISCHNOCHITONIDAE)
- craticulatus, Murex craticulatus M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1882 - syn of: Hadriania craticulata (G.B. Brocchi, 1814) - (MURICIDAE)
- craticulatus, Boreotrophon craticulatus O. Fabricius, 1780 - syn of: Scabrotrophon fabricii (H.P.C. Møller, 1842) - (MURICIDAE)
- craticulatus, Murex craticulatus G.B. Brocchi, 1814 - syn of: Hadriania craticulata (G.B. Brocchi, 1814) - (MURICIDAE)
- craticulatus, Murex craticulatus C. Linnaeus, 1758 - syn of: Turrilatirus craticulatus (C. Linnaeus, 1758) - (MURICIDAE)
- craticulatus, Notocrater craticulatus (H.H. Suter, 1908) - (PSEUDOCOCCULINIDAE)
- craticulatus alba, Turrilatirus craticulatus alba (A. Scacchi, 1835) - (FASCIOLARIIDAE)
- craticulatus albus, Murex craticulatus albus A. Scacchi, 1835 - syn of: Hadriania craticulata (G.B. Brocchi, 1814) - (MURICIDAE)
- craticulatus bopira, Murex craticulatus bopira A. De Gregorio, 1885 - syn of: Hadriania craticulata (G.B. Brocchi, 1814) - (MURICIDAE)
- craticulatus bopirus, Murex craticulatus bopirus A. De Gregorio, 1885 - syn of: Hadriania craticulata (G.B. Brocchi, 1814) - (MURICIDAE)
- craticulatus cosga, Murex craticulatus cosga A. De Gregorio, 1885 - syn of: Hadriania craticulata (G.B. Brocchi, 1814) - (MURICIDAE)
- craticulatus cosgus, Murex craticulatus cosgus A. De Gregorio, 1885 - syn of: Hadriania craticulata (G.B. Brocchi, 1814) - (MURICIDAE)
- craticulatus ipima, Murex craticulatus ipima A. De Gregorio, 1885 - syn of: Hadriania craticulata (G.B. Brocchi, 1814) - (MURICIDAE)
- craticulatus ipimus, Murex craticulatus ipimus A. De Gregorio, 1885 - syn of: Hadriania craticulata (G.B. Brocchi, 1814) - (MURICIDAE)
- craticulatus oreteus, Murex craticulatus oreteus A. De Gregorio, 1885 - syn of: Hadriania craticulata (G.B. Brocchi, 1814) - (MURICIDAE)
- craticulatus pianosana, Fusus craticulatus pianosana R. Sturany, 1896 - syn of: Hirtomurex squamosus (Ant. Bivona-Bernardi, 1838) - (FASCIOLARIIDAE)
- craticulatus propetipa, Murex craticulatus propetipa A. De Gregorio, 1885 - syn of: Hadriania craticulata (G.B. Brocchi, 1814) - (MURICIDAE)
- craticulatus propetipus, Murex craticulatus propetipus A. De Gregorio, 1885 - syn of: Hadriania craticulata (G.B. Brocchi, 1814) - (MURICIDAE)
- craticulatus rocheta, Murex craticulatus rocheta A. De Gregorio, 1885 - syn of: Hadriania craticulata (G.B. Brocchi, 1814) - (MURICIDAE)
- craticulatus rochetus, Murex craticulatus rochetus A. De Gregorio, 1885 - syn of: Hadriania craticulata (G.B. Brocchi, 1814) - (MURICIDAE)
- craticulatus trisa, Murex craticulatus trisa A. De Gregorio, 1885 - syn of: Hadriania craticulata (G.B. Brocchi, 1814) - (MURICIDAE)
- craticulatus trisus, Murex craticulatus trisus A. De Gregorio, 1885 - syn of: Hadriania craticulata (G.B. Brocchi, 1814) - (MURICIDAE)
- craticuloides, Chesacardium craticuloides (T.A. Conrad, 1845 †) - (CARDIIDAE) (FOSSIL)
- craticuloides, Hadriania craticuloides E.H. Vokes, 1964 - syn of: Hadriania craticulata (G.B. Brocchi, 1814) - (MURICIDAE)
- craticulum, Hemicerithium craticulum R.C. Hoerle, 1972 † - (CERITHIIDAE) (FOSSIL)
- cratis, Etrema cratis R.N. Kilburn & H. Dekker, 2008 - (CLATHURELLIDAE)
- cratis, Fusinus cratis R.N. Kilburn, 1973 - (FASCIOLARIIDAE)
- Cratis, Genus Cratis C. Hedley, 1915 (PHILOBRYIDAE)
- cratista, Drillia cratista J.C. Melvill, 1927 - (DRILLIIDAE)
- cratitia, Montfortia cratitia (A. Adams, 1852) - (FISSURELLIDAE)
- cratitia, Neocancilla cratitia A. Adams, 1853 - syn of: Neocancilla hebes (L.A. Reeve, 1845) - (MITRIDAE)
- cratitioides, Subemarginula cratitioides M. Yokoyama, 1924 - syn of: Montfortula picta (R.W. Dunker, 1860) - (FISSURELLIDAE)
- cratitoides, Hemitoma cratitoides M. Yokoyama, 1926 - syn of: Montfortula picta (R.W. Dunker, 1860) - (FISSURELLIDAE)
- cratus, Callihoplites cratus (Seeley, 1865 †) - (HOPLITIDAE) (FOSSIL)
- crauroptera, Timbellus crauroptera (R. Houart, 1991) - (MURICIDAE)
- craveciae, Leptotrigonia craveciae (Saveliev, 1958 †) - (MYOPHORELLIDAE) (FOSSIL)
- cravenensis, Gemma cravenensis Gardner, 1943 † - (VENERIDAE) (FOSSIL)
- craveni, Lissachatina craveni (E.A. Smith, 1881) - (ACHATINIDAE)
- craveni arctespirata, Lissachatina craveni arctespirata (J.R. Bourguignat, 1889) - (ACHATINIDAE)
- Cravenites, Genus Cravenites † (GONIATITIDA (UNASSIGNED)) (FOSSIL)
- Cravenoceras, Genus Cravenoceras Bisat , 1928 † (CRAVENOCERATIDAE) (FOSSIL)
- CRAVENOCERATIDAE Ruzhencev, 1957 † - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-GONIATITIDA [Order]-NEOGLYPHIOCERATOIDEA [Superfamily]) (FOSSIL)
- Cravenoceratoides, Genus Cravenoceratoides Hudson , 1941 † (CRAVENOCERATIDAE) (FOSSIL)
- craverii, Pisanianura craverii (L.M.D. Bellardi, 1873 †) - (PISANIANURIDAE) (FOSSIL)
- craverii, Vitrea craverii C. Pollonera, 1885 - syn of: Vitrea subrimata (O.W.H. Reinhardt, 1871) - (PRISTILOMATIDAE)
- craverii, Leguminaia craverii C. Pollonera, 1899 - syn of: Microcondylaea compressa (K.T. Menke, 1830) - (UNIONIDAE)
- crawfordcatei, Bernaya crawfordcatei F.P. Jousseaume 1884 † - (CYPRAEIDAE) (FOSSIL)
- crawfordcatei, Margovula crawfordcatei F.Jr. Lorenz & D. Fehse, 2009 - (OVULIDAE)
- crawfordi, Archachatina simplex crawfordi P.M.A. Morelet, 1889 - (ACHATINIDAE)
- crawfordi, Pisinna crawfordi (E.A. Smith, 1901) - (ANABATHRIDAE)
- crawfordi, Penion crawfordi (F.W. Hutton, 1873 †) - (BUCCINIDAE) (FOSSIL)
- crawfordi, Kimberleytrachia crawfordi (G.A. Solem, 1979) - (CAMAENIDAE)
- crawfordi, Torresitrachia crawfordi G.A. Solem, 1979 - syn of: Kimberleytrachia crawfordi (G.A. Solem, 1979) - (CAMAENIDAE)
- crawfordi, Chiton crawfordi (E.R. Sykes, 1899) - (CHITONIDAE)
- crawfordi, Rhyssoplax crawfordi E.R. Sykes, 1899 - syn of: Chiton crawfordi (E.R. Sykes, 1899) - (CHITONIDAE)
- crawfordi, Limnothauma crawfordi F. Haas, 1955 - (COCHLIOPIDAE)
- crawfordi, Rostanga crawfordi (R.F. Burn, 1969) - (DISCODORIDIDAE)
- crawfordi, Murex crawfordi G.B. III Sowerby, 1892 - syn of: Vaughtia scrobiculata (R.W. Dunker in R.A. Philippi, 1846) - (MURICIDAE)
- crawfordi, Hima crawfordi G.B. Sowerby, 1892 - syn of: Nassarius kochianus (R.W. Dunker, 1846) - (NASSARIIDAE)
- crawfordi, Nassarius kochianus crawfordi G.B. III Sowerby, 1892 - (NASSARIIDAE)
- crawfordi, Mesopeplum crawfordi (F.W. Hutton, 1873 †) - (PECTINIDAE) (FOSSIL)
- crawfordi, Syrnola crawfordi A.W.B. Powell, 1927 - (PYRAMIDELLIDAE)
- crawfordi, Rissoa crawfordi E.A. Smith, 1901 - (RISSOIDAE)
- crawfordi, Macomopsis crawfordi (G.B. III Sowerby, 1892) - (TELLINIDAE)
- crawfordi ordinaria, Macomopsis crawfordi ordinaria (G.B. III Sowerby, 1904) - (TELLINIDAE)
- crawfordi??, Penion crawfordi?? (F.W. Hutton, 1873) - (BUCCINIDAE)
- Crawfordia, syn of: Genus Crawfordina W.H. Dall, 1919 (CANCELLARIIDAE)
- crawfordiana, Cancellaria crawfordiana W.H. Dall, 1891 - (CANCELLARIIDAE)
- crawfordiana, Euspira crawfordiana (W.H. Dall, 1908) - (NATICIDAE)
- crawfordianus, Euspira crawfordianus W.H. Dall, 1908 - syn of: Euspira crawfordiana (W.H. Dall, 1908) - (NATICIDAE)
- Crawfordina, Genus Crawfordina W.H. Dall, 1919 (CANCELLARIIDAE)
- crawfurdi, Batissa crawfurdi Noetling, 1895 † - (CYRENIDAE) (FOSSIL)
- crawshayi, Photinula crawshayi E.A. Smith, 1905 - (CALLIOSTOMATIDAE)
- crawshayi, Melanoides crawshayi E.A. Smith, 1893 - (THIARIDAE)
- crawshayi, Viviparus crawshayi E.A. Smith, 1893 - (VIVIPARIDAE)
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