Glyptozaria columnaria B.C. Cotton & N.H. Woods,1935
Turritella columnaris L.C. Kiener, 1844
Turritella communis A. Risso, 1826
Turritella comptus (FOSSIL) G.P. Deshayes, 1861 †
Mesalia concava (FOSSIL) Abbass, 1967 †
Turritella congelata A. Adams & L.A. Reeve,1849
Vermicularia conica (FOSSIL) J.B.P.A. Lamarck, 1804 †
Turritella conofaciata (FOSSIL) F. Sacco, 1895 †
Turritella conoidea (FOSSIL) Sowerby, 1814 †
Turritella conquistadorana (FOSSIL) G.D. Hanna & Israelsky,1925 †
Sigmesalia consobrina (FOSSIL) (G.P. Deshayes, 1861 †)
Turritella conspera Adams & L.A. Reeve, 1850
Turritella conspersa A. Adams & L.A. Reeve,1849
Colpospira conspicabilis (FOSSIL) (R. Tate, 1893 †)
Vermicularia contorta (FOSSIL) Blake †
Turritella contracta (FOSSIL) Sowerby, 1850 †
Turritella cookei W.C. Mansfield, 1930
Turritella cooperi Carpenter, 1864
Colpospira cordismei (Watson, 1881)
Turritella coreanica (T. Kotaka, 1951)
Turritella cornea J.B.P.A. Lamarck, 1822
Turritella coursisi I. Marche-Marchad, 1959
Turritella couteaudi J.F. Mabille& A. de Rochebrune, 1889
Mariacolpus covepointensis (FOSSIL) E.J. Petuch, 2004 †
Turritella cramatensis (FOSSIL) Martin, 1905 †
Turritella crenulata (FOSSIL) P. Nyst, 1844 †
Turritella crocea L.C. Kiener, 1843
Turritella cruzadoi (FOSSIL) DeVries, 2007 †
Eligmostoma culsensis (FOSSIL) A.E.M. Cossmann, 1888 †
Turritella cumberlandia (FOSSIL) T.A. Conrad, 1863 †
Turritella curamichatensis (FOSSIL) F. Hodson, 1926 †
Colpospira curialis C. Hedley, 1907
Turritella dalli (FOSSIL) Gardner, 1947 †
Turritella darwini (FOSSIL) R.A. Philippi, 1887 †
Turritella daviesi (FOSSIL) Cox, 1930 †