Cerion cinereavaria C.J. Maynard, 1913
Cerion circumscriptum C.G. Aguayo & M.L. Jaume,1951
Cerion circumscriptum tenuicallum C.G. Aguayo& M.I. Sánchez Roig, 1953
Cerion cisnerosi W.J. Clench & C.G. Aguayo,1951
Cerion clappi (C.J. Maynard, 1894)
Strophiops clara C.J. Maynard, 1924
Cerion clathrata (G. Humphrey, 1797)
Cerion clenchi S.J. Gould & D.S. Woodruff,1986
Cerion coaretata H.H. Beck, 1837
Cerion cobarrubia C.G. Aguayo & M.L. Jaume,1951
Cerion columbinus M.I. Sánchez Roig, 1951
Cerion columna H.A. Pilsbry & E.G. Vanatta,1895
Strophiops concina C.J. Maynard, 1924
Cerion conus H.H. Beck, 1837
Strophiops copia (C.J. Maynard, 1889)
Cerion costata H.H. Beck, 1837
Cerion costulata H.H. Beck, 1837
Cerion coutini M.I. Sánchez Roig, 1951
Strophiops crassalabra C.J. Maynard & W.F. Clapp,1921
Strophiops crassamarga C.J. Maynard & W.F. Clapp,1924
Cerion crassicostata H.A. Pilsbry, 1896
Cerion crassilabris G.B. Sowerby, 1875
Cerion crassilabris sallei H.A. Pilsbry & E.G. Vanatta,1896
Cerion crassiusculum C. de la Torre in H.A. Pilsbry& E.G. Vanatta, 1899
Strophiops crescentia C.J. Maynard & W.F. Clapp,1921
Cerion cumingiana L. Pfeiffer, 1852
Cerion cyclostomum (H.C. Küster, 1841)
Strophiops cylindriata C.J. Maynard & W.F. Clapp,1920
Strophiops cylindrica C.J. Maynard, 1896
Strophiops dallii (C.J. Maynard, 1889)
Cerion deani M. Smith, 1943
Cerion decumanus (A.E.J. Férussac, 1821)
Cerion degeneri W.J. Clench, 1948
Strophiops degenis C.J. Maynard & W.F. Clapp,1920
Strophiops delicata C.J. Maynard, 1913