Bulinus cernicus P.M.A. Morelet, 1867 Mauritius
Ancylus cestasensis (FOSSIL) M.A. Peyrot, 1932 †
Ferrissia ceylanica (W.H. Benson, 1864) Sri Lanka
Gyraulus chaenostomus (Š. Brusina, 1902)
Ancylus charpenterianus J.R. Bourguignat, 1853 Chile, Valparaiso
Anisus charteus (F. Held, 1837)
Anisus chereshnevi L.A. Prozorova& Y.I. Starobogatov, 1997
Gyraulus chinensis (R.W. Dunker, 1848) Japan
Biomphalaria choanomphala (E.C. Von Martens, 1879) Kenya
Ferrissia chudeaui J. Germain, 1917 Mali
Drepanotrema cimex (S. Moricand, 1839) Brazil, Curitiba, State of Paranà5 mm
Gyraulus circumstriatus (G.W. Tryon, 1866) Florida
Segmentina clessini (C.A. Westerlund, 1873) Sweden, Öland Island
Ferrissia clessiniana (C.F. Jickeli, 1882) Italy, Lago Maggiore
Ferrissia clifdeni M. Connolly, 1939 South Africa
Nautilinus clymene (R.J. Shuttleworth, 1852) Canary Islands
Gyraulus cockburni H.H. Godwin-Austen, 1883 Yemen, Socotra Island
Planorbella columbiensis H.B. Baker, 1945 Canada, British Columbia
Amerianna compar T. Iredale, 1943 Australia
Hippeutis complanatus (C. Linnaeus, 1758) England, Norfolk4,5 mm
Gyraulus compressus (F.W. Hutton, 1849) Indonesia, Sulawesi
Gyraulus concavus G. Mandahl-Barth, 1954 Lake Victoria
Uncancylus concentricus (A.V.M.D. D'Orbigny,1835) Uruguay4 mm
Physastra concinna (A. Adams & L.A. Reeve,1864) Australia, Darwin
Anisus concinnus (C.A. Westerlund, 1881) Sweden, Ronneby
Anisus confusus (FOSSIL) L. Soós, 1934 †
Gyraulus connivens (K.E.I. von Eichwald,1830)
Ferrissia connollyi B. Walker, 1912 Central Africa
Gyraulus connollyi D.S. Brown& J.A. van Eeden, 1969 South Africa
Stimulator consetti T. Iredale, 1944 Western Australia, Kimberley
Gyraulus constans (Š. Brusina, 1884)
Bathyomphalus contortus (C. Linnaeus, 1758) Belgium5 mm
Pierosoma contrerasi (H.A. Pilsbry, 1920) Mexico, Jalisco
Gyraulus convexiusculus (F.W. Hutton, 1849) India, Calcutta
Menetus cooperi H.B. Baker, 1945 Canada, Alberta