Bulinus cernicus P.M.A. Morelet, 1867
Ancylus cestasensis (FOSSIL) M.A. Peyrot, 1932 †
Ferrissia ceylanica (W.H. Benson, 1864)
Gyraulus chaenostomus (Š. Brusina, 1902)
Ancylus charpenterianus J.R. Bourguignat, 1853
Anisus charteus (F. Held, 1837)
Anisus chereshnevi L.A. Prozorova& Y.I. Starobogatov, 1997
Gyraulus chinensis (R.W. Dunker, 1848)
Biomphalaria choanomphala (E.C. Von Martens, 1879)
Ferrissia chudeaui J. Germain, 1917
Drepanotrema cimex (S. Moricand, 1839)
Gyraulus circumstriatus (G.W. Tryon, 1866)
Segmentina clessini (C.A. Westerlund, 1873)
Ferrissia clessiniana (C.F. Jickeli, 1882)
Ferrissia clifdeni M. Connolly, 1939
Nautilinus clymene (R.J. Shuttleworth, 1852)
Gyraulus cockburni H.H. Godwin-Austen, 1883
Planorbella columbiensis H.B. Baker, 1945
Amerianna compar T. Iredale, 1943
Hippeutis complanatus (C. Linnaeus, 1758)
Gyraulus compressus (F.W. Hutton, 1849)
Gyraulus concavus G. Mandahl-Barth, 1954
Uncancylus concentricus (A.V.M.D. D'Orbigny,1835)
Physastra concinna (A. Adams & L.A. Reeve,1864)
Anisus concinnus (C.A. Westerlund, 1881)
Anisus confusus (FOSSIL) L. Soós, 1934 †
Gyraulus connivens (K.E.I. von Eichwald,1830)
Ferrissia connollyi B. Walker, 1912
Gyraulus connollyi D.S. Brown & J.A. van Eeden,1969
Stimulator consetti T. Iredale, 1944
Gyraulus constans (Š. Brusina, 1884)
Bathyomphalus contortus (C. Linnaeus, 1758)
Pierosoma contrerasi (H.A. Pilsbry, 1920)
Gyraulus convexiusculus (F.W. Hutton, 1849)
Menetus cooperi H.B. Baker, 1945