Bythiospeum pfeifferi (S. Clessin, 1890)
Beddomeia phasianella W.F. Ponder & K.B. Clark,1993
Rachipteron philopelum F.G. Thompson, 1964
Bythiospeum photophila (D. Geyer, 1907)
Micromelania phrygica (FOSSIL) (P. Oppenheim, 1919 †)
Micromelania picta (FOSSIL) Seninski, 1905 †
Pyrgulopsis pictilis R. Hershler, 1998
Pseudamnicola pieperi H. Schütt, 1980
Fluviopupa pikinini S. Zielske & M. Haase,2014
Fontelicella pinetorum D.W. Taylor, 1987
Islamia piristoma M. Bodon & S. Cianfanelli,2002
Plagigeyeria piroti J. Bole & F. Velkovrh,1987
Hydrobia pisana (FOSSIL) W.A. Wenz, 1924 †
Austropyrgus pisinnus A. Clark, W.B. Miller& W.F. Ponder, 2003
Pseudamnicola pisolinus (A. Paladilhe, 1876)
Pyrgulopsis pisteri R. Hershler & D.W. Sada,1987
Plagigeyeria plagiostoma (A.J. Wagner, 1914)
Hauffenia plana J. Bole, 1961
Phreatodrobia plana R. Hershler & A.J. Longley,1986
Paludestrina plana (FOSSIL) T.H. Aldrich, 1911 †
Hydrobia planata (FOSSIL) (Du Bois de Montpéreux,1831 †)
Fissuria planospira M. Bodon, S. Cianfanelli& E. Talenti, 1987
Hydrobia plena J.C. Bequaert & W.J. Clench,1936
Pyrgulopsis plicata R. Hershler, 1998
Bythiospeum plivense P. Glöer & J. Grego, 2015
Hydrobia podolica (FOSSIL) Lomnicki, 1886 †
Turricaspia polejaevi (FOSSIL) (N.I. Andrusov, 1902 †)
Tepalcatia polia (F.G. Thompson& R. Hershler, 1991)
Gocea polinskii (P. Radoman, 1960)
Socenia politioanei (FOSSIL) E. Jekelius, 1944 †
Hydrobia polytropida (FOSSIL) Š. Brusina, 1892 †
Odontohydrobia pompatica (FOSSIL) M. Harzhauser & al.,2012 †
Cincinnatia ponderosa F.G. Thompson, 1968
Pseudopaludinella pontieuxini (P. Radoman, 1973)
Hydrobia pontilitoris (FOSSIL) W.A. Wenz, 1942 †