Gyraulus coranus T. Iredale, 1943
Africanogyrus coretus (H.M.D. de Blainville,1826)
Bulinus corici (FOSSIL) M. Harzhauser & al.,2012 †
Gyraulus corinna (J.E. Gray, 1850)
Planorbarius corneus (C. Linnaeus, 1758)
Planorbarius cornu (FOSSIL) (A. Brongniart, 1810 †)
Planorbarius cornucopia (FOSSIL) (J.L.Jr. Baily, 1858 †)
Planorbis cornusolidus (FOSSIL) Thomä, 1845 †
Planorbella corpulenta (T. Say, 1824)
Anisus correctus (C.A. Westerlund, 1897)
Glyptophysa cosmeta T. Iredale, 1943
Pierosoma costaricense (H.B. Preston, 1907)
Biomphalaria costata W.A. Biese, 1951
Gyraulus costatus (E. Klein, 1846 )
Gyraulus costulatus (C.F.F. von Krauss, 1848)
Biomphalaria cousini W.L. Paraense, 1966
Planorbula crassilabris (B. Walker)
Africanogyrus crassilabrum (P.M.A. Morelet, 1860)
Ancylastrum crassistriata H.B. Preston, 1911
Planorbarius crassus (FOSSIL) (P.M.T. de Serres,1844 †)
Anisus crassus (E.M. Da Costa, 1778)
Gyraulus crassus G. Mandahl-Barth, 1954
Ferrissia crenellata (FOSSIL) M. Harzhauser & al.,2012 †
Gyraulus crenophilus B. Hubendick & P. Radoman,1959
Biomphalaria crequii (G. Courty, 1907)
Gyraulus crescens (F.M. Hilgendorf, 1867 )
Ancylina cretacea (FOSSIL) (L. von G. Tausch,1886 †)
Planorbis cretensis P. Glöer& H.J. Hirschfelder, 2015
Gyraulus crista (C. Linnaeus, 1758)
Gyraulus cristaeformis (Gozhik & Prysjazhnjuk,1978)
Biomphalaria cristiani Fuentealba & Figueroa,2012
Choanomphalus cryptomphalus W. Dybowski, 1901
Gyraulus cryptornatus (Sauerzopf, 1953 )
Bulinus crystallinus P.M.A. Morelet, 1868
Fossulorbis cultratum (A.V.M.D. D'Orbigny,1841)