Glyphostoma candida (R.B. Hinds, 1843)
Nannodiella candidula (L.A. Reeve, 1846)
Glyphostoma canfieldi (W.H. Dall, 1871)
Clathurella capaniola (W.H. Dall, 1919)
Etrema capillata C. Hedley, 1922
Glyphostoma cara (K.H.J. Thiele, 1925)
Lienardia cardinalis (L.A. Reeve, 1845)
Etremopsis carinapex (FOSSIL) Powell, 1942 †
Etrema carinata L. Bozzetti, 2009
Euclathurella carissima (H.A. Pilsbry & H.N. Lowe,1932)
Glyphostoma carmen (G.B. II Sowerby, 1882)
Glyphostoma caronensis (FOSSIL) W.C. Mansfield, 1925 †
Crockerella castianira (W.H. Dall, 1919)
Etrema catapasta C. Hedley, 1922
Glyphostoma chipolanum (FOSSIL) J. Gardner, 1937 †
Clathurella clathra (R.P. Lesson, 1842)
Glyphostoma claudoni (P. Dautzenberg, 1900)
Etremopsis clifdenica (FOSSIL) A.W.B. Powell, 1942 †
Paraclathurella clothonis C. Hedley, 1922
Lienardia coccinea (H.E. Anton, 1838)
Scobinella coelata (FOSSIL) T.A. Conrad, 1848 †
Clathromangelia coffea J.T. Kuroda, T. Habe& K. Oyama, 1971
Lienardia comideleuca (J.C. Melvill & R. Standen,1903)
Etremopsis compta (FOSSIL) A.W.B. Powell, 1942 †
Lienardia compta (L.A. Reeve, 1845)
Lienardia compta emmae J.C. Melvill & R. Standen,1895
Domenginella conoides (FOSSIL) (D.C. Solander †)
Crockerella conradiana (W.M. Gabb, 1869)
Crockerella constricta (W.M. Gabb, 1865)
Etrema constricta C.F. Laseron, 1954
Etrema contempta (E.A. Smith, 1888)
Clathurella contortula G. Nevill & H. Nevill,1875
Clathurella convexa J.G. Jeffreys, 1882
Glyphostoma coronaseminale E.F. Garcia, 2015
Acamptogenotia coronata (FOSSIL) (J.B.P.A. Lamarck,1803 †)