Hydrobia brazieri E.A. Smith, 1882
Bythiospeum bressanum R. Bernasconi, 1985
Martensamnicola brevicula (E.C. Von Martens, 1874)
Goniochilus breviformis (FOSSIL) (Papp, 1953 †)
Pyrgulopsis breviloba R. Hershler, 1998
Fluviopupa brevior (C.M.F. Ancey, 1905)
Graecoanatolica brevis P. Radoman, 1973
Hadopyrgus brevis F.M. Climo, 1974
Avenionia brevis (J.P.R. Draparnaud, 1805)
Avenionia brevis reyniesii (D. Dupuy, 1851)
Kerkia brezicensis M. Bodon & S. Cianfanelli,1996
Beddomeia briansmithi W.F. Ponder & K.B. Clark,1993
Hydrobia brondeli J.R. Bourguignat, 1862
Caspia brotzkajae Y.I. Starobogatov, 1992
Pyrgulopsis bruneauensis R. Hershler, 1990
Pseudohoratia brusinae (P. Radoman, 1953)
Hydrobia brusinai (FOSSIL) W.A. Wenz, 1919 †
Andrusovia brusinai Y.I. Starobogatov, 2000
Pseudodianella brusinai (FOSSIL) (J.R. Tournouër, 1875 †)
Pseudodianella brusinai (FOSSIL) (Willmann, 1981 †)
Pseudamnicola brusiniana (S. Clessin& W. Dybowski in W. Dybowski, 1888)
Pyrgulopsis bryantwalkeri R. Hershler, 1994
Hydrobia buccinoides J.R.C. Quoy & J.P. Gaimard,1835
Maeotidia bucculenta (FOSSIL) N.I. Andrusov, 1890 †
Austropyrgus buchanensis A. Clark, W.B. Miller& W.F. Ponder, 2003
Bucharamnicola bucharica (V.I. Zhadin, 1952)
Prososthenia budusi (FOSSIL) E. Jekelius, 1932 †
Salakosia bukowskii (FOSSIL) Willmann, 1981 †
Fluviopupa bula S. Zielske & M. Haase,2014
Belgrandiella bulgarica A.M. Angelov, 1972
Sadleriana bulgarica (A.J. Wagner, 1928)
Gloeria bulgarica D.G. Georgiev, I. Dedov& Varadinova, 2012
Radomaniola bulgarica P. Glöer & D.G. Georgiev,2009
Kolevia bulgarica D.G. Georgiev & P. Glöer,2015
Austropyrgus bullerensis A. Clark, W.B. Miller& W.F. Ponder, 2003