Mesembrinus columbiensis (L. Pfeiffer, 1855)
Bostryx columellaris L.A. Reeve, 1849
Naesiotus columellaris W.K. Weyrauch, 1967
Ornatimormus combinai W.K. Weyrauch, 1958
Drymaeus comis H.B. Preston, 1907
Bostryx compactus H.C. Fulton, 1901
Rabdotus confinus L.A. Reeve, 1850
Drymaeus confluens L. Pfeiffer, 1855
Mesembrinus conicus S.I. Da Costa, 1907
Bostryx conspersus (G.B. I Sowerby, 1833)
Naesiotus constrictus (L.A. Reeve, 1848)
Drymaeus conus H.A. Pilsbry, 1902
Drymaeus convexus (L. Pfeiffer, 1855)
Neopetraeus cora (A.V.M.D. D'Orbigny,1835)
Scutalus coraeformis H.A. Pilsbry, 1897
Scutalus coraeformis debilisculptus W.K. Weyrauch, 1967
Kora corallina L.R.L. Simone, 2012
Bulimulus corderoi J.J. Parodíz, 1962
Bostryx cordillerae P. von Ströbel, 1874
Bulimulus coriaceus L. Pfeiffer, 1857
Bulimulus corneus G.B. I Sowerby, 1833
Bulimus corrugatus P.P. King, 1831
Bulimulus corumbaensis H.A. Pilsbry, 1897
Naesiotus cosmicus J.F. Mabille, 1895
Drymaeus costaricensis L. Pfeiffer, 1862
Bostryx costellatus M.I. Hylton-Scott, 1971
Scutalus costifer H.A. Pilsbry, 1932
Scutalus costifer naggsi A.S.H. Breure, 1978
Scutalus costulatus W.K. Weyrauch, 1967
Vermiculatus cotopaxiensis (L. Pfeiffer, 1853)
Scutalus cousini (F.P. Jousseaume, 1887)
Mesembrinus cozumelensis (H.G. Richards, 1936)
Bostryx cracentis A.S.H. Breure, 1978
Bostryx cremonthauma H.A. Pilsbry
Lopesianus crenulatus W.K. Weyrauch, 1958