Nephronaias plicatula (J.G.F. de Charpentierin H.C. Küster, 1856)
Lamprotula plumbea (J.H. Chemnitz, 1795)
Nephritica poeyana (I. Lea, 1857)
Lamprotula polysticta (P.M. Heude, 1877)
Popenaias popeii (I. Lea, 1857)
Lampsilis powellii I. Lea, 1852
Trapezoideus prashadi F. Haas, 1922
Elliptio producta T.A. Conrad, 1836
Psorula profunda (C.T. Simpson, 1914)
Epioblasma propinqua (I. Lea, 1857)
Anodonta pseudodopsis É.A.A. Locard, 1883
Oxynaia pugio (W.H. Benson, 1862)
Elliptio pullata (I. Lea, 1856)
Toxolasma pullus T.A. Conrad, 1838
Potamilus purpuratus J.B.P.A. Lamarck, 1819
Simpsonella purpurea (A. Valenciennes in A.von Humboldt& A. Bonpland, 1821)
Elliptio purpurella (I. Lea, 1857)
Disconaias purpuriata (T. Say, 1831)
Amphinaias pustulosa (I. Lea, 1831)
Amphinaias pustulosa mortoni (T.A. Conrad, 1836)
Pleurobema pyriforme I. Lea, 1857
Sinanodonta qingyuani He & Z. Zhuang, 2013
Psorula quadrata (C.T. Simpson, 1914)
Anodontoides quadrata (FOSSIL) McCoy †
Quadrula quadrula C.S. Rafinesque, 1820
Unio rackianus (FOSSIL) Š. Brusina, 1874 †
Lampsilis radiata (J.F. Gmelin, 1791)
Lampsilis radiata luteola (J.B.P.A. Lamarck, 1819)
Lampsilis radiata siliquoidea D.W. Barnes, 1823
Cristaria radiata C.T. Simpson, 1900
Anodontoides radiatus (T.A. Conrad, 1834)
Discomya radulosa (H. Drouët & M.A. Chaper,1892)
Lampsilis rafinesqueana L.S. Frierson, 1927
Parreysia rajahensis (I. Lea, 1841)
Gonidea randalli (J.B. Trask, 1855)