Gyraulus pamphylicus P. Glöer & W. Rähle, 2009
Biomphalaria panamensis (R.W. Dunker, 1848)
Gyraulus pankongensis E.C. Von Martens, 1882
Laevapex papillaris (E.C. Von Martens, 1899)
Kessneria papillosa J.C. Walker & W.F. Ponder,2001
Ferrissia parallelus (S.S. Haldeman, 1841)
Biomphalaria pararyensis (F.C. Baker, 1914)
Ancylus parmophorus (FOSSIL) C. De Stefani, 1880 †
Gyraulus parvulus (Lörenthey, 1906)
Choanomphalus parvus (Kozhov, 1936)
Gyraulus parvus (T. Say, 1817)
Ancylus patagonicus W.A. Biese, 1948
Choanomphalus patulaeformis W.A. Lindholm, 1909
Gyraulus pavlovici (Š. Brusina, 1893)
Glyptophysa pectorosa (T.A. Conrad, 1850)
Gyraulus pelecystoma D.S. Brown, 1975
Planorbarius penchinati (J.R. Bourguignat, 1870)
Laevapex peninsulae H.A. Pilsbry, 1903
Gyraulus percarinatus W.L. Paraense, 2000
Biomphalaria peregrina (A.V.M.D. D'Orbigny,1835)
Anisus perezii (M.de la Paz Graellsin D. Dupuy, 1850)
Bulinus permembranaceus H.B. Preston, 1912
Gyraulus perstriatulus H.B. Preston, 1916
Helisoma peruvianum (W.J. Broderip, 1832)
Gyraulus peruzzii (FOSSIL) (De Stefani, 1880) †
Biomphalaria petenensis (P.M.A. Morelet, 1851)
Glyptophysa petiti (J.C.H. Crosse, 1872)
Acrorbis petricola N.H. Odhner, 1937
Segmentina petropolitana N.D. Kruglov& E.V. Soldatenko, 1997
Planorbis petrovici (FOSSIL) P.S. Pavlovic, 1931 †
Ferrissia petterdi (G. Johnston, 1879)
Biomphalaria pfeifferi (C.F.F. von Krauss, 1848)
Gyraulus phacecercus (Š. Brusina, 1902)
Planorbarius philippei (FOSSIL) (É.A.A. Locard, 1883 †)
Ancylus philippianus W.A. Biese, 1948