Diodora catilla L.A. Reeve, 1850
Diodora cayenensis J.B.P.A. Lamarck, 1822
Diodora cayenensis henekeni (FOSSIL) C.J. Maury, 1917 †
Cranopsis cearensis L.R.L. Simone & C.M. Cunha,2014
Montfortula chathamensis (H.J. Finlay, 1928)
Medusafissurella chemnitzii (Sowerby, 1835)
Fissurella chica (FOSSIL) C. Nielsen, 2003 †
Tugali chilensis McLean, 1970
Diodora chipolana (FOSSIL) (W.H. Dall, 1892 †)
Emarginula choristes W.H. Dall, 1925
Emarginula christiaensi P. Piani, 1985
Tugali cicatricosa Adams, 1851
Profundisepta circularis (W.H. Dall, 1881)
Diodora clathrata (L.A. Reeve, 1849)
Emarginula clathrataeformis (FOSSIL) K.E.I. von Eichwald,1830 †
Fissurella clenchi I. Pérez Farfante, 1943
Lucapinella clypeata (FOSSIL) (J.P.S. Grateloup,1828 †)
Lucapinella clypeata tapina (FOSSIL) (A. De Gregorio, 1884 †)
Entomella clypeata (FOSSIL) (J.B.P.A. Lamarck,1802 †)
Emarginula clypeus A. Adams, 1852
Fissurella coarctata P.P. King, 1832
Diodora codocedae J.H. McLean & B.G. Andrade,1982
Cranopsis columbaris L.R.L. Simone & C.M. Cunha,2014
Tugali colvillensis H.J. Finlay, 1926
Amblychilepas compressa K.H.J. Thiele, 1930
Agariste compressa (FOSSIL) (F.J. Cantraine, 1835 †)
Scutus compressum (FOSSIL) (G.P. Deshayes, 1861 †)
Macroschisma compressum A. Adams, 1851
Emarginula compta T. Habe, 1953
Cosmetalepas concatenatus (J.C.H. Crosse, 1864)
Emarginula concinna A. Adams, 1852
Fissurella concolor R.A. Philippi, 1867
Emarginula conformis (FOSSIL) A.E.M. Cossmann& A. Lambert, 1884 †
Puncturella conica (A.V.M.D. D'Orbigny,1841)
Emarginula connectens K.H.J. Thiele, 1915