Drepanotrema pileatum W.L. Paraense, 1971
Protancylus pileolus P.B. Sarasin & K.F. Sarasin,1898
Isidorella pilosa (J.E. Tenison-Woods,1878)
Planorbella pilsbryi F.C. Baker, 1926
Planorbarius pinguis (C.A. Westerlund, 1885)
Gyraulus piscinarum (J.R. Bourguignat, 1852)
Segmentorbis planodiscus (J.C. Melvill& J.H. Ponsonby, 1897)
Choanomphalus planorbiformis J. Beckmann& Y.I. Starobogatov, 1975
Planorbis planorbis (C. Linnaeus, 1758)
Gyraulus platystomus A. Nützel & K. Bandel,1993
Ancylastrum ponsonbyi B. Walker, 1924
Gyraulus ponticus (Lörenthey, 1893)
Ferrissia pontileviensis (FOSSIL) (Morgan, 1920 †)
Gyraulus popovici (P.S. Pavlovic, 1927 )
Gyraulus porcellaneus (Lörenthey, 1902)
Menetus portlandensis H.B. Baker, 1945
Physopsis praeclara J.R. Bourguignat, 1879
Planorbarius praecorneus (FOSSIL) (Fischer& J.R. Tournouër, 1873 †)
Planorbis praecursor (FOSSIL) A.E.M. Cossmann, 1883 †
Gyraulus praeponticus (Gorjanovic-Kramberger,1890)
Camptoceras prashadi W.J. Clench, 1931
Gyraulus prasongi R.A.M. Brandt, 1974
Planorbis prespensis R. Sturany, 1894
Gyraulus primiformis (Sauerzopf, 1953 )
Planorbis primordialis (FOSSIL) Piton, 1940 †
Biomphalaria prona (E.C. Von Martens, 1873)
Gyraulus protectus E. Jekelius, 1944
Gyraulus protocrescens A. Nützel & K. Bandel,1993
Hebetancylus providentialis C.B. Wurtz, 1951
Gyraulus pseudhomalosomus (Sauerzopf, 1953 )
Gyraulus pseudotenuis (F.M. Hilgendorf, 1867 )
Planorbella pseudotrivolvis F.C. Baker, 1920
Gyraulus ptychostomus (Š. Brusina, 1902)
Gyraulus ptycophorus (Š. Brusina, 1892 )
Biomphalaria pucarensis (H.B. Preston, 1909)