Amphicyclotus palenquensis (H.A. Pilsbry, 1935)
Poteria pallescens C.B. Adams, 1852
Aperostoma palmeri (P. Bartsch& J.P.E. Morrison, 1942)
Neocyclotus panamensis S.I. Da Costa, 1904
Amphicyclotus parvus F.G. Thompson, 1963
Xenocyclus patulus F.G. Thompson, 1969
Amphicyclotus paulsonorum F.G. Thompson, 1969
Crocidopoma perdistinctum (J. Gundlach, 1858)
Neocyclotus perezi (J.G. Hidalgo, 1866)
Incerticyclus perpallidus (C.B. Adams, 1851)
Amphicyclotus perplexus C. de la Torre, P. Bartsch& J.P.E. Morrison, 1942
Rugicyclotus perplexus (P. Bartsch, 1942)
Aperostoma peruense C. de la Torre, P. Bartsch& J.P.E. Morrison, 1942
Aperostoma peruvianus (S.I. Da Costa, 1906)
Dicrista petersi (G.A. Solem, 1956)
Incidostoma pittieri (E.C. Von Martens, 1900)
Aperostoma pizarroi P. Bartsch& J.P.E. Morrison, 1942
Poteria plana P. Bartsch, 1942
Ostodes plicatus (A.A. Gould, 1847)
Amphicyclotus ponderosus (L. Pfeiffer, 1851)
Aperostoma popayanum (H.C. Lea, 1839)
Incidostoma portobellense C. de la Torre, P. Bartsch& J.P.E. Morrison, 1942
Barbacyclus princeps (H.A. Pilsbry, 1935)
Neocyclotus prominulus (A.V.M.D. D'Orbigny,1852)
Aperostoma pulchellum C. de la Torre, P. Bartsch& J.P.E. Morrison, 1942
Neocyclotus quitensis (L. Pfeiffer, 1852)
Aperostoma redfieldi C. de la Torre, P. Bartsch& J.P.E. Morrison, 1942
Cycladamsia rubra (E. Chitty, 1857)
Cycladamsia rudisplanusque (E. Chitty, 1857)
Amphicyclotus rufescens (G.B. Sowerby, 1843)
Austrocyclotus rugatus (R.J.L. Guppy, 1864)
Dicrista rugosa F.G. Thompson, 1969
Poteria santaguitensis H.B. Baker, 1923
Ostodes savaii W.J. Clench, 1949
Poteria savannensis P. Bartsch, 1942