Lymnaea azabatschensis N.D. Kruglov& Y.I. Starobogatov, 1989
Radix bactriana (T.N. Annandale& B. Prashad, 1919)
Lymnaea badia (H.C. Küster, 1862)
Lymnaea bakowskyana (S. Clessin, 1879)
Radix balatonica (FOSSIL) (A. Fuchs, 1870 †)
Radix balthica (C. Linnaeus, 1758)
Radix berbestiensis (FOSSIL) Macale?, 2000 †
Lymnaea biacuminata T.N. Annandale & Surya Rao,1925
Corymbina bicarinata (FOSSIL) (Fuchs, 1877) †
Lymnaea bodamica (K. Miller, 1873)
Provalenciennesia boeckhi (FOSSIL) (Halaváts, 1887 †)
Lymnaea bogatschevi (FOSSIL) M.V. Vinarski & Frolov,2016 †
Radix bogdanensis (FOSSIL) Macale?, 2000 †
Valenciennius bonei (FOSSIL) Hanganu, 1972 †
Ladislavella bonnevillensis (R.E. Call, 1884)
Stagnicola bouilleti (FOSSIL) (A. Michaud, 1855 †)
Lymnaea bowelli H.B. Preston, 1909
Lymnaea brardi (FOSSIL) G.P. Deshayes, 1863 †
Radix brevicauda (G.B. II Sowerby, 1872)
Valenciennius brusinae (FOSSIL) (Gorjanovic-Kramberger,1901 †)
Stagnicola bucciniformis (FOSSIL) (F. Sacco, 1886 †)
Myxas buchii (FOSSIL) (K.E.I. von Eichwald,1830 †)
Galba bulimoides (FOSSIL) (E. Klein, 1846 †)
Sphaerogalba bulimoides (I. Lea, 1841)
Cerasina bulla (W. Kobelt, 1881)
Radix calavardensis (FOSSIL) (Bukowski, 1896 †)
Lymnaea callomphala (G. Servain, 1881)
Hinkleyia caperata (T. Say, 1829)
Lymnaea carelica N.D. Kruglov& Y.I. Starobogatov, 1983
Lantzia carinata F.P. Jousseaume, 1872
Zagrabica carinata (FOSSIL) N.I. Andrusov, 1909 †
Stagnicola catascopium (T. Say, 1816)
Stagnicola catascopium niagaraensis unknown
Lymnaea chereshnevi N.D. Kruglov& Y.I. Starobogatov, 1989
Lymnaea chilensis H.H. Beck, 1837