Gouldiopa consternans (P.G. Oliver & M. Zuschin,2001)
Dosinia contracta (R.A. Philippi, 1844)
Dosinia contusa (L.A. Reeve, 1850)
Leukoma coquandi (FOSSIL) (L.H. Hupé, 1854 †)
Costellipitar cor (S.C.T. Hanley, 1844)
Protapes cor (G.B. II Sowerby, 1853)
Tivela cora A. Römer, 1864
Lamelliconcha cora (FOSSIL) (J. Brown & H.A. Pilsbry,1911 †)
Periglypta corbis (J.B.P.A. Lamarck, 1818)
Pitar corbulina (FOSSIL) (J.B.P.A. Lamarck,1806 †)
Pelecyora corculum (A. Römer, 1870)
Marcia cordata (P. Forsskål in C. Niebuhr,1775)
Pitarenus cordatus (J.S. Schwengel, 1951)
Katelysia corioensis (FOSSIL) R. Tate, 1887 †
Pitar coroanus (FOSSIL) F. Hodson, 1927 †
Dosinia corrugata (L.A. Reeve, 1850)
Venerupis corrugata (J.F. Gmelin, 1791)
Venerupis corrugata saxatilis (L.B. Fleuriau de Bellevue,1802)
Venerupis corrugata senegalensis (J.F. Gmelin, 1791)
Circe corrugata (L.W. Dillwyn, 1817)
Nagaoella corrugata (FOSSIL) (Nagao 1934) †
Tapes corrugatus (J.F. Gmelin, 1791)
Chione cortinaria (FOSSIL) B. Rogers & B. Rogers,1847 †
Chione costaricensis (FOSSIL) A.A. Olsson, 1922 †
Timoclea costellifera (A. Adams & L.A. Reeve,1850)
Dosinia cottoni (FOSSIL) J. Marwick, 1927 †
Pitar coxeni (E.A. Smith, 1884)
Chione craspedonia (FOSSIL) (W.H. Dall, 1903 †)
Dollfusia crassa (FOSSIL) A.E.M. Cossmann, 1886 †
Atamarcia crassa (FOSSIL) J. Marwick, 1927 †
Circe crassatellaeformis (FOSSIL) A.E.M. Cossmann, 1906 †
Atamarcia crassatelliformis (FOSSIL) (J. Marwick, 1927 †)
Leukoma crassicosta (G.P. Deshayes, 1835)
Timoclea crassisquamata (B. Prashad, 1932)
Paphia crassisulca (J.B.P.A. Lamarck, 1818)