Ca
- †Cabrievoceras
- †Cadoceras
- †Cadomites
- †Cadomoceras
- †Caenisites
- †Caenocyclus
- †Caenolyroceras
- †Cainoceras
- †Calaiceras
- †Californiceras
- †Callihoplites
- †Calliphylloceras
- †Calliptychoceras
- †Callizoniceras
- †Caloceras
- †Calycoceras
- †Campylites
- †Canadoceras
- †Canavarella
- †Canavaria
- †Canavarites
- †Cancelloceras
- †Cantabricanites
- †Cantabrigites
- †Cardiella
- †Cardioceras
- †Carinoceras
- †Carinoclymenia
- †Carinophylloceras
- †Carnites
- †Carstenia
- †Carthaginites
- †Catacoeloceras
- †Catasigaloceras
- †Catulloceras
- †Caucasites
- †Caumontisphinctes
- †Cavilentia
[edit]