Cacophonia, Genus – synonym of Lutraria, Genus
Cacozelia, Genus – synonym of Bittium, Genus
Cacozeliana, Genus – synonym of Bittium, Genus
Cadlinidae, Familia – synonym of Chromodorididae, Familia
Calcaraea, Genus – synonym of Cochlodesma, Genus
Caliphyllidae, Familia – synonym of Polybranchiidae, Familia
Callista, Genus – synonym of Venus, Genus
Calopodium, Genus – synonym of Pandora, Genus
Calpurnia, Genus – synonym of Simnia, Genus
Campaspe, Genus – synonym of Dendronotus, Genus
Candellista, Genus – synonym of Tritonia, Genus
Candiella, Genus – synonym of Tritonia, Genus
Canetoma, Genus – synonym of Oenopota, Genus
Canthopsis, Genus – synonym of Alderia, Genus
Capellinia, Genus – synonym of Eubranchus, Genus
Capiluna, Genus – synonym of Diodora, Genus
Capisterium, Genus – synonym of Donax, Genus
Capsa, Genus – synonym of Tellina, Genus
Capulis, Genus – synonym of Capulus, Genus
Capullus, Genus – synonym of Capulus, Genus
Caragolus, Genus – synonym of Osilinus, Genus
Cardiarius, Genus – synonym of Cerastoderma, Genus
Carryodoris, Genus – synonym of Geitodoris, Genus
Cemoria, Genus – synonym of Puncturella, Genus
Cenodagreutes, Genus – synonym of Raphitoma, Genus
Cerana, Genus – synonym of Dosinia, Genus
Cerastes, Genus – synonym of Cerastoderma, Genus
Cerastobyssum, Genus – synonym of Parvicardium, Genus
Ceratisolen, Genus – synonym of Pharus, Genus
Cerithidium, Genus – synonym of Bittium, Genus
Cerithiolinum, Genus – synonym of Cerithiella, Genus
Cerithiolum, Genus – synonym of Bittium, Genus
Cestoma, Genus – synonym of Oenopota, Genus
Chaenopaea, Genus – synonym of Panomya, Genus
Chalidis, Genus – synonym of Limapontia, Genus
Chalmon, Genus – synonym of Trophon, Genus
Chasteria, Genus – synonym of Cerithiella, Genus
Cheiloteuthis, Genus – synonym of Gonatus, Genus
Chelenassa, Genus – synonym of Nassarius, Genus
Chenopus, Genus – synonym of Aporrhais, Genus
Chironia, Genus – synonym of Kellia, Genus
Chlamydina, Genus – synonym of Chlamys, Genus
Choristes, Genus – synonym of Amauropsis, Genus
Chrysodomus, Genus – synonym of Neptunea, Genus
Cibota, Genus – synonym of Arca, Genus
Cinctodonta, Genus – synonym of Thracia, Genus
Cinetodonta, Genus – synonym of Thracia, Genus
Cingilla, Genus – synonym of Cingula, Genus
Cingula, Genus – synonym of Crisilla, Genus
Cingulina, Genus – synonym of Obtusella, Genus
Circomphalus, Genus – synonym of Venus, Genus
Circompholos, Genus – synonym of Dosinia, Genus
Circulidae, Familia – synonym of Adeorbidae, Familia
Cirillia, Genus – synonym of Raphitoma, Genus
Clamys, Genus – synonym of Chlamys, Genus
Clathrus, Genus – synonym of Epitonium, Genus
Clausina, Genus – synonym of Thyasira, Genus
Clausina, Genus – synonym of Venus, Genus
Cleanthus, Genus – synonym of Berthella, Genus
Cloelia, Genus – synonym of Hero, Genus
Clotho, Genus – synonym of Hiatella, Genus
Coccinella, Genus – synonym of Trivia, Genus
Coleophysis, Genus – synonym of Retusa, Genus
Colliculus, Genus – synonym of Gibbula, Genus
Collisellacmea, Genus – synonym of Acmaea, Genus
Conacmaea, Genus – synonym of Tectura, Genus
Conalvinia, Genus – synonym of Alvania, Genus
Conulus, Genus – synonym of Calliostoma, Genus
Coramya, Genus – synonym of Hiatella, Genus
Cordieria, Genus – synonym of Raphitoma, Genus
Coriareus, Genus – synonym of Montacuta, Genus
Coronalvania, Genus – synonym of Alvania, Genus
Coryphellina, Genus – synonym of Coryphella, Genus
Costatopatella, Genus – synonym of Patella, Genus
Costelloleda, Genus – synonym of Nuculana, Genus
Craspedochilus, Genus – synonym of Lepidochitona, Genus
Crassina, Genus – synonym of Astarte, Genus
Cratena, Genus – synonym of Cuthona, Genus
Crisillosetia, Genus – synonym of Crisilla, Genus
Crypta, Genus – synonym of Crepidula, Genus
Cryptocella, Genus – synonym of Lamellaria, Genus
Cryptodon, Genus – synonym of Thyasira, Genus
Crypton, Genus – synonym of Thyasira, Genus
Crystallophrisson, Genus – synonym of Chaetoderma, Genus
Crystalloteuthis, Genus – synonym of Galiteuthis, Genus
Cufea, Genus – synonym of Polycera, Genus
Cultrensis, Genus – synonym of Phaxas, Genus
Cuneus, Genus – synonym of Donax, Genus
Curtitoma, Genus – synonym of Oenopota, Genus
Cuspeulima, Genus – synonym of Eulima, Genus
Custiphorus, Genus – synonym of Calliopaea, Genus
Cuthonella, Genus – synonym of Cuthona, Genus
Cuthonidae, Familia – synonym of Tergipedidae, Familia
Cyanoplax, Genus – synonym of Lepidochitona, Genus
Cycladina, Genus – synonym of Lasaea, Genus
Cyclodostomia, Genus – synonym of Odostomia, Genus
Cyclonassinae, Familia – synonym of Nassariidae, Familia
Cyclonoidea, Genus – synonym of Aclis, Genus
Cyclopsidae, Familia – synonym of Nassariidae, Familia
Cyclostoma, Genus – synonym of Epitonium, Genus
Cycria, Genus – synonym of Ommastrephes, Genus
Cydippe, Genus – synonym of Arcopagia, Genus
Cylindriturbonilla, Genus – synonym of Turbonilla, Genus
Cylleninae, Familia – synonym of Nassariidae, Familia
Cymbulostrea, Genus – synonym of Ostrea, Genus
Cyphoxis, Genus – synonym of Arca, Genus
Cyrachaea, Genus – synonym of Myrtea, Genus
Cyrtocythara, Genus – synonym of Mangelia, Genus
Cyrtoides, Genus – synonym of Raphitoma, Genus
Cyrtosolen, Genus – synonym of Solecurtus, Genus
Cyrtoturbonilla, Genus – synonym of Turbonilla, Genus
Cystia, Genus – synonym of Limatula, Genus
Cytharella, Genus – synonym of Mangelia, Genus