Mourlonia broondensis (FOSSIL) Tolmachoff, 1930 †
Burdekinostoma burdekinensis (FOSSIL) Cook, 1997 †
Euryzone burdekininesis (FOSSIL) Cook, 1997 †
Baylea burtasorum (FOSSIL) (Golowkinsky, 1868 †)
Gosseletina callosa (FOSSIL) (de Koninck, 1843 †)
Euryzone calva (FOSSIL) J. Perner, 1907 †
Euzone calypso (FOSSIL) (Laube, 1868 †)
Ananias campbelli (FOSSIL) C.O. Waterhouse, 1963 †
Mourlonia cancellata (FOSSIL) Chronic, 1952 †
Peruvispira canningensis (FOSSIL) Taboada & al., 2015 †
Apachella capertoni (FOSSIL) (Beede, 1907 †)
Dictyotomaria capillaria (FOSSIL) (T.A. Conrad, 1842 †)
Mourlonia carinata (FOSSIL) (Sowerby, 1813 †)
Peruvispira carinata (FOSSIL) C.O. Waterhouse, 1987 †
Dictyotomaria carlbransoni (FOSSIL) W.J. Gordon& E.L. Yochelson, 1975 †
Stenozone carlsbadensis (FOSSIL) Batten, 1989 †
Villmaria catenulata (FOSSIL) (d'Archiac & de Verneuil,1842 †)
Ibergia centrifuga (FOSSIL) (A. Römer, 1843 †)
Champernownia champernowni (FOSSIL) (Whidborne, 1892 †)
Odontomaria cheeneetnukensis (FOSSIL) Frýda & al., 2006 †
Spinulrichospira cheeneetnukensis (FOSSIL) Blodgett & Rohr, 1989 †
Salterospira chesterensis (FOSSIL) (F.B. Meek& A.H. Worthen, 1860 †)
Glabrocingulum chesterensis (FOSSIL) (Thein & Nitecki, 1974 †)
Wellergyi chesterensis (FOSSIL) Thein & Nitecki, 1974 †
Baylea chimbulatiensis (FOSSIL) Mazaev, 2015 †
Spinulrichospira churkini (FOSSIL) Blodgett, 1992 †
Glyptotomaria ciliata (FOSSIL) (A.H. Clarke, 1904 †)
Ibergia circularis (FOSSIL) (B. Phillips, 1841 †)
Humboldtiella clarkei (FOSSIL) (Holzapfel, 1895 †)
Euryzone clausa (FOSSIL) (J.W. Hall, 1879 †)
Conotoma claustrata (FOSSIL) (Lindström, 1884 †)
Wisconsinella clelandi (FOSSIL) Blodgett, 1988 †
Neilsonia coatesi (FOSSIL) Peel, 2016 †
Baylea coheni (FOSSIL) E.L. Yochelson, 1962 †
Shwedagonia collabra (FOSSIL) Batten, 1972 †