Urocoptis concolor C. de la Torre, 1950 Cuba
Pfeiffericoptis concreta (J. Gundlach in L. Pfeiffer, 1863) Cuba
Gongylostoma confusa (R. Arango, 1882) Cuba
Microceramus conicus C. de la Torre& P. Bartsch, 1972 Cuba
Sagracoptis consanguinea (R. Arango, 1882) Cuba
Gongylostoma consimilis C. de la Torre& P. Bartsch, 1972 Cuba
Organocoptis constantia C. de la Torre& P. Bartsch, 1972 Cuba
Gongylostomella contentiosa (R. Arango, 1884) Cuba
Coelostemma cordylum F.G. Thompson& E.L. Mihalcik, 2011 Mexico, Durango
Sagracoptis coronadoi (R. Arango in L. Pfeiffer, 1864) Cuba
Nodulia corpulenta (G.C. Spence, 1936) Cuba12,6 mm
Cochlodinella corralillensis C. de la Torre& P. Bartsch, 1972 Cuba
Liocallonia cortinoi C. de la Torre& P. Bartsch, 1972 Cuba
Coelostemma costatum F.G. Thompson& E.L. Mihalcik, 2011 Mexico, Durango
Microceramus costatus C. de la Torre& P. Bartsch, 1972 Barbados
Microceramus costellaris (J. Gundlach in L. Pfeiffer, 1863) Cuba
Torrecoptis costellaris C. de la Torre& P. Bartsch, 1972 Cuba
Geoscala costulata (C.B. Adams, 1849) Jamaica
Macroceramus costulatus J. Gundlach in L. Pfeiffer, 1859 Cuba13 mm
Poecilocoptis crassilabris (R. Arango, 1882) Cuba
Archegocoptis crenata (C.D. Weinland& E.C. Von Martens, 1859) Haiti
Microceramus crenatus (J. Gundlach in L. Pfeiffer, 1864) Cuba
Tomelasmus crenulatus (J. Gundlach, 1857) Cuba20 mm
Gongylostomella creola (C.G. Aguayo, 1934) Cuba
Cylindrella cretacea L. Pfeiffer, 1860 Mexico
Sagracoptis crispula (L. Pfeiffer, 1839) Cuba11 mm
Pfeiffericoptis cristallina (B.H. Wright in L. Pfeiffer, 1865) Cuba
Gymnocentrum crosseanum (L. Pfeiffer, 1867) Veracruz, Mexico
Holospira crossei W.H. Dall, 1895
Microceramus cubaensis C. de la Torre& P. Bartsch, 1972 Cuba
Liocallonia cuestai (C. de la Torre, 1930) Cuba
Liocallonia cumbrensis C. de la Torre& P. Bartsch, 1972 Cuba
Torrecoptis curta C. de la Torre& P. Bartsch, 1972 Cuba
Macroceramus cuzcoensis C. de la Torre& P. Bartsch, 1972 Cuba
Holospira cyclostoma H.A. Pilsbry, 1953 Sonora, Mexico