Anadara olssoni (FOSSIL) Clark & J.W. Durham,1946 †
Barbatia oostinghi (FOSSIL) C. Beets, 1941 †
Anadara opthanta (FOSSIL) W.P. Woodring, 1925 †
Acar opuraensis (FOSSIL) (Powell & J.A. Bartrum,1928 †)
Bathyarca orbiculata (W.H. Dall, 1881)
Bathyarca orientalis (K.H.J. Thiele& S.G.A. Jaeckel, 1931)
Barbatia ornata (FOSSIL) G.P. Deshayes, 1858 †
Barbatia osawanoensis (FOSSIL) Tsuda 1959 †
Lunarca ovalis (J.G. Bruguière, 1789)
Anadara oyomai T. Habe
Arca pacifica Sowerby, 1833
Trisidos palabuanensis (FOSSIL) K. Martin, 1910 †
Barbatia palmerae (FOSSIL) H.G. Richards, 1953 †
Anadara panensis (FOSSIL) H.F.A. von Ihering,1914 †
Anadara pangkaensis (FOSSIL) (K. Martin, 1910 †)
Arca pantheonensis (FOSSIL) E.M. Spieker, 1922 †
Barbatia paradiagona (FOSSIL) D.T. Dockery, 1982 †
Arca parallelogramma (FOSSIL) Dufour, 1881 †
Arca paratina (FOSSIL) W.H. Dall, 1898 †
Arca particularis (FOSSIL) Del Rio, 1992 †
Barbatia parva (G.B. I Sowerby, 1833)
Barbatia parvivillosa (T. Iredale, 1939)
Anadara pasada (FOSSIL) A.A. Olsson, 1964 †
Anadara passa T. Iredale, 1939
Arca patagonica (FOSSIL) H.F.A. von Ihering,1897 †
Anadara patriarcha (FOSSIL) Anderson, 1929 †
Arca patriarchalis P.F. Röding, 1798
Anadara patricia (FOSSIL) G.B. Sowerby, 1849 †
Anadara pectinata (FOSSIL) (G.B. Brocchi, 1814 †)
Bathyarca pectunculoides (A. Scacchi, 1834)
Arca peethensis (FOSSIL) d'Archaic, 1850 †
Acar penjicus (FOSSIL) V.N. Sinelnikova, 1997 †
Lunarca pennelli (FOSSIL) W.M. Gabb, 1873 †
Arca pergracilis (FOSSIL) B. Wade, 1926 †
Barbatia perinesa P.G. Oliver& H.C.G. Chesney, 1994