Gyraulus gilberti (R.W. Dunker, 1848)
Biomphalaria glabrata (T. Say, 1818)
Biomphalaria glabrata bahiensis (R.W. Dunker, 1886)
Planorbis gladilini (FOSSIL) P.S. Pavlovic, 1931 †
Bulinus globosus P.M.A. Morelet, 1866
Gyraulus globosus (Sauerzopf, 1953 )
Gyraulus goetzendorfensis (Sauerzopf, 1953 )
Ancylastrum gordonensis J.C. Melvill& J.H. Ponsonby, 1903
Gyraulus goussardianus (Noulet, 1854)
Choanomphalus grachevi T.Y. Sitnikova & Röpstorf,1999
Biomphalaria gracilenta (A.A. Gould, 1855)
Gyraulus gracilis (Gozhik & Prysjazhnjuk,1978 )
Plesiophysa granulata (R.J. Shuttleworthin G.B. Sowerby, 1873)
Plesiophysa guadeloupensis (P. Fischer in H.P. Mazé,1883)
Anisus guerichi (FOSSIL) (A. Andreae, 1902 †)
Bulinus guernei P. Dautzenberg, 1890
Isidorella hainesii (G.W. Tryon, 1866)
Planorbarius halavatsi (FOSSIL) T.A. Neubauer, M. Harzhauser, A. Kroh, E. Georgopoulou& O. Mandic,
Segmentina haueri (FOSSIL) F. Stoliczka, 1862 †
Biomphalaria havanensis (L. Pfeiffer, 1839)
Gyraulus hebraicus (J.R. Bourguignat, 1852)
Gyraulus helicophantoides (P.S. Pavlovic, 1927 )
Drepanotrema heloicum (A.V.M.D. D'Orbigny,1835)
Biomphalaria helophila (A.V.M.D. D'Orbigny,1835)
Segmentina hemisphaerula W.H. Benson, 1842
Ferrissia hendersoni B. Walker, 1908
Planorbarius heriacensis (FOSSIL) (C.F. Fontannes, 1876 †)
Gyraulus hesperus T. Iredale, 1943
Gyraulus heudei (S. Clessin, 1886)
Bulinus hexaploidus J.B. Burch, 1972
Gyraulus hians (H. Rolle, 1860)
Gyraulus hiemantium C.A. Westerlund
Bulinus hightoni D.S. Brown & S.H. Wright,1978
Anisus hilgendorfi (Fraas, 1868)
Gundlachia hinkleyi B. Walker, 1917