Anadara perlabiata Grant & H.R. Gale, 1931
Arca perpectinata (FOSSIL) A. De Gregorio, 1930 †
Anadara perplura (FOSSIL) W.P. Woodring, 1925 †
Scapharca pertenuicosta (FOSSIL) C.J. Maury, 1924 †
Arca perventricosa T. Iredale, 1939
Bathyarca perversidens C. Hedley, 1902
Acar petasion (R.N. Kilburn, 1983)
Anadara petersburgensis A.A. Olsson & A. Harbison,1953
Anadara petersburgensis? A.A. Olsson & A. Harbison,1953
Arca petropolitana (FOSSIL) H.B. Stenzel & A. Krause,1957 †
Barbatia phalacra (FOSSIL) W.H. Dall, 1898 †
Bathyarca philippiana (P. Nyst, 1848)
Bathyarca philippiana grenophia (A. Risso, 1826)
Barbatia picota (FOSSIL) A.A. Olsson, 1964 †
Anadara pilula (L.A. Reeve, 1843)
Scapharca pinguescens (FOSSIL) C.J. Maury, 1924 †
Scaphula pinna W.H. Benson, 1856
Barbatia pistachia (J.B.P.A. Lamarck, 1819)
Bathyarca pisum W.H. Dall, P. Bartsch& H.A. Rehder, 1938
Arca pittensis (FOSSIL) J. Marwick, 1928 †
Cunearca pittieri (FOSSIL) W.H. Dall, 1912 †
Barbatia platei (W. Stempell, 1899)
Acar plicata (L.W. Dillwyn, 1817)
Anadara plicatura (FOSSIL) (T.A. Conrad, 1845 †)
Bathyarca polycyma (W.H. Dall, 1881)
Bathyarca pompholax W.H. Dall, 1908
Acar powelli (FOSSIL) C.R. Laws, 1950 †
Barbatia praenominata A.E.M. Cossmann& M.A. Peyrot, 1912
Arca praerudis (FOSSIL) Dufour, 1881 †
Barbatia pratti (FOSSIL) (Morris & J. Lycett,1948 †)
Anadara preangerensis (FOSSIL) K. Martin, 1910 †
Anadara prephina (FOSSIL) (W.P. Woodring, 1925 †)
Arca primitiva (FOSSIL) Phillips †
Lunarca proletaria (FOSSIL) H.A. Pilsbry & Johnson,1917 †
Barbatia propatula (FOSSIL) (T.A. Conrad, 1844 †)