Urocoptis concolor C. de la Torre, 1950
Pfeiffericoptis concreta (J. Gundlachin L. Pfeiffer, 1863)
Gongylostoma confusa (R. Arango, 1882)
Microceramus conicus C. de la Torre & P. Bartsch,1972
Sagracoptis consanguinea (R. Arango, 1882)
Gongylostoma consimilis C. de la Torre & P. Bartsch,1972
Organocoptis constantia C. de la Torre & P. Bartsch,1972
Gongylostomella contentiosa (R. Arango, 1884)
Coelostemma cordylum F.G. Thompson& E.L. Mihalcik, 2011
Sagracoptis coronadoi (R. Arango in L. Pfeiffer,1864)
Nodulia corpulenta (G.C. Spence, 1936)
Cochlodinella corralillensis C. de la Torre & P. Bartsch,1972
Liocallonia cortinoi C. de la Torre & P. Bartsch,1972
Coelostemma costatum F.G. Thompson& E.L. Mihalcik, 2011
Microceramus costatus C. de la Torre & P. Bartsch,1972
Microceramus costellaris (J. Gundlachin L. Pfeiffer, 1863)
Torrecoptis costellaris C. de la Torre & P. Bartsch,1972
Geoscala costulata (C.B. Adams, 1849)
Macroceramus costulatus J. Gundlach in L. Pfeiffer,1859
Poecilocoptis crassilabris (R. Arango, 1882)
Archegocoptis crenata (C.D. Weinland& E.C. Von Martens, 1859)
Microceramus crenatus (J. Gundlachin L. Pfeiffer, 1864)
Tomelasmus crenulatus (J. Gundlach, 1857)
Gongylostomella creola (C.G. Aguayo, 1934)
Cylindrella cretacea L. Pfeiffer, 1860
Sagracoptis crispula (L. Pfeiffer, 1839)
Pfeiffericoptis cristallina (B.H. Wrightin L. Pfeiffer, 1865)
Gymnocentrum crosseanum (L. Pfeiffer, 1867)
Holospira crossei W.H. Dall, 1895
Microceramus cubaensis C. de la Torre & P. Bartsch,1972
Liocallonia cuestai (C. de la Torre, 1930)
Liocallonia cumbrensis C. de la Torre & P. Bartsch,1972
Torrecoptis curta C. de la Torre & P. Bartsch,1972
Macroceramus cuzcoensis C. de la Torre & P. Bartsch,1972
Holospira cyclostoma H.A. Pilsbry, 1953