Gyraulus pamphylicus P. Glöer & W. Rähle, 2009 Turkey, Antalya
Biomphalaria panamensis (R.W. Dunker, 1848) West Panama
Gyraulus pankongensis E.C. Von Martens, 1882 Tibet
Laevapex papillaris (E.C. Von Martens, 1899) Mexico, Jalisco
Kessneria papillosa J.C. Walker& W.F. Ponder, 2001 Northern Territory
Ferrissia parallelus (S.S. Haldeman, 1841) Canada/USA, Lake Superior
Biomphalaria pararyensis (F.C. Baker, 1914) Brazil
Ancylus parmophorus (FOSSIL) C. De Stefani, 1880 †
Gyraulus parvulus (Lörenthey, 1906)
Choanomphalus parvus (Kozhov, 1936)
Gyraulus parvus (T. Say, 1817) Missouri, Nodaway County4,1 mm
Ancylus patagonicus W.A. Biese, 1948 Chile, Los Lagos
Choanomphalus patulaeformis W.A. Lindholm, 1909
Gyraulus pavlovici (Š. Brusina, 1893)
Glyptophysa pectorosa (T.A. Conrad, 1850) Australia, Bogan River
Gyraulus pelecystoma D.S. Brown, 1975 Kenya
Planorbarius penchinati (J.R. Bourguignat, 1870)
Laevapex peninsulae H.A. Pilsbry, 1903 Bahamas
Gyraulus percarinatus W.L. Paraense, 2000 Panama
Biomphalaria peregrina (A.V.M.D. D'Orbigny,1835) Cuba17,3 mm
Anisus perezii (M.de la Paz Graells in D. Dupuy, 1850)
Bulinus permembranaceus H.B. Preston, 1912 Kenya
Gyraulus perstriatulus H.B. Preston, 1916 Japan, Oumi Hachiman
Helisoma peruvianum (W.J. Broderip, 1832)
Gyraulus peruzzii (FOSSIL) (De Stefani, 1880) †
Biomphalaria petenensis (P.M.A. Morelet, 1851) Guatemala
Glyptophysa petiti (J.C.H. Crosse, 1872) New Caledonia, Kaoris8,1 mm
Acrorbis petricola N.H. Odhner, 1937 Brazil
Segmentina petropolitana N.D. Kruglov& E.V. Soldatenko, 1997 Latvia, Vidzerne
Planorbis petrovici (FOSSIL) P.S. Pavlovic, 1931 †
Ferrissia petterdi (G. Johnston, 1879) South Australia, Adelaide
Biomphalaria pfeifferi (C.F.F. von Krauss, 1848) Malawi10,2 mm
Gyraulus phacecercus (Š. Brusina, 1902)
Planorbarius philippei (FOSSIL) (É.A.A. Locard, 1883 †)
Ancylus philippianus W.A. Biese, 1948