Cymbiola complexa nielseni D.F. McMichael, 1963
Parvivoluta concinna (FOSSIL) B. Wade, 1926 †
Fulgoraria concinna (W.J. Broderip, 1836)
Fulgoraria concinna corrugata (W.J. Broderip, 1836)
Fulgoraria concinna rosea (W.J. Broderip, 1836)
Alcithoe concisa (FOSSIL) J. Marwick, 1931 †
Spinomelon confusa (FOSSIL) (J. Marwick, 1926 †)
Volutospina conicoturrita (FOSSIL) R.B. Newton, 1922 †
Volutoconus coniformis (J.C. Cox, 1871)
Lapparia conradi (FOSSIL) K.V.W. Palmer, 1953 †
Scaphella contoyensis W.K. Emerson & W.E. Old,1979
Eovoluta coquillensis (FOSSIL) (F.E. Turner, 1938 †)
Minicymbiola corderoi (A. Carcelles, 1953)
Provocator corderoi A. Carcelles, 1947
Lyria cordis F.M. Bayer, 1971
Scaphella coronaspira (FOSSIL) E.J. Petuch, 1988 †
Liopeplum coronatum (FOSSIL) N.F. Sohl, 1964 †
Lyria coroni (FOSSIL) (L.J. Morlet, 1888 †)
Notopeplum cossignanii G.T. Poppe, 1999
Miomelon cossmanni (FOSSIL) H.F.A. von Ihering,1907 †
Lyriopsis cossmanni (FOSSIL) (E.W. Vredenburg, 1923 †)
Eopsephaea costaria (FOSSIL) (J.B.P.A. Lamarck,1802 †)
Scaphella costaricana (FOSSIL) A.A. Olsson, 1922 †
Paramoria costellifera (FOSSIL) (R. Tate, 1889 †)
Pseudaulicina coxi (FOSSIL) D. Merle & J.M. Pacaud,2014 †
Cymbiola cracenta (D.F. McMichael, 1963)
Leptoscapha crassilabrum (FOSSIL) R. Tate, 1889 †
Peruluta crassiuscula (FOSSIL) (Woods, 1922 †)
Lyria craticulata (FOSSIL) Darragh, 2017 †
Athleta crenulifera (FOSSIL) J.F. Bayan, 1870 †
Liopeplum cretaceum (FOSSIL) (T.A. Conrad, 1858 †)
Alcithoe cribrosa (FOSSIL) (R. Tate, 1889 †)
Ctenilyria ctenista (FOSSIL) W.P. Woodring, 1964 †
Voluta cubaguaensis (FOSSIL) Gibson-Smith, 1973 †
Cymbium cucumis P.F. Röding, 1798