Gyraulus pulcher A. Mori, 1938
Gyraulus pulici (Š. Brusina, 1897)
Planorbarius purpura (O.F. Müller, 1774)
Menetus pygmaeus (FOSSIL) G.P. Deshayes, 1863 †
Choanomphalus pygmaeus W.A. Lindholm, 1909
Glyptophysa pyramidata G.B. Sowerby, 1873
Gyraulus quadrangulus (FOSSIL) (M. von Neumayr, 1875 †)
Gundlachia radiata (L. Guilding, 1828)
Fuchsogyra radmanesti (FOSSIL) (A. Fuchs, 1870 †)
Biomphalaria raimondi (R.A. Philippi, 1869)
Helicorbis rara I.M. Moskvichevain F. Zatrawkin, 1985
Gyraulus rasseri T.A. Neubauer & al., 2014
Ancylus recurvus E.C. Von Martens, 1873
Amerianna reevii (A. Adams & G.F. Angas,1864)
Ancylus regularis D.S. Brown, 1973
Bulinus reticulatus G. Mandahl-Barth, 1954
Planorbarius reticulatus (FOSSIL) Roshka, 1973 †
Biomphalaria retusus (P.M.A. Morelet, 1849)
Biomphalaria reversa (FOSSIL) S.G. Cabrera, I. Martínez& Norbis, 2016 †
Gyraulus revertens (F.M. Hilgendorf, 1867 )
Camptoceras rezvoji (W.A. Lindholm, 1929)
Biomphalaria rhodesiensis G. Mandahl-Barth, 1957
Gyraulus rhytidophorus (Š. Brusina, 1902 )
Gyraulus riparius (C.A. Westerlund, 1865)
Ferrissia rivularis (T. Say, 1817)
Africanogyrus rodriguezensis (J.C.H. Crosse, 1873)
Planorbarius romani (FOSSIL) (P. Jodot, 1958 †)
Sineancylus rosanae (D.E. Gutiérrez Gregoric,2012)
Seminolina roseae (FOSSIL) E.J. Petuch, 1991 †
Planorbis roshkai (FOSSIL) Prysjazhnjuk & Kovalenko,1986 †
Segmentina roskai (FOSSIL) Gozhik & Prysjazhnjuk,1978 †
Gyraulus rossiteri (J.C.H. Crosse, 1871)
Gyraulus rossmaessleri (B. Auerswald, 1851)
Gyraulus rotella (C. Rousseau, 1842)
Gyraulus rotula (W.H. Benson, 1850)