Protocardia peregrinorsa (FOSSIL) (A.V.M.D. D'Orbigny,1842 †) Egypt, Bir Lagama
Cardium perobliquum (FOSSIL) Martin, 1882 † Indonesia, Junghuhn
Septocardia peruviana (FOSSIL) L.R. Cox, 1949 † Argentina, Alumbre Creek
Protocardia pesolina (FOSSIL) Contejean, 1859 † Mexico, Chiapas, Ocozocoautla de Espinosa
Agnocardia pessoae (FOSSIL) (C.J. Maury, 1925 †) Brazil, Rio Pirabas
Trachycardium pessoae (FOSSIL) (C.J. Maury, 1924 †) Brazil, Pará, Salinopolis
Pseudocatillus petkovici (FOSSIL) (P.S. Pavlovic, 1929 †) Serbia
Pseudocatillus pharnaci (FOSSIL) (Schwez, 1913 †)
Iheringicardium philippi (FOSSIL) (H.F.A. von Ihering,1897 †) Argentina, Santa Cruz, Magallanes
Protocardia philippiana (FOSSIL) R.W. Dunker, 1847 † China, Guangdong, Jiangmen
Vasticardium philippinense (C. Hedley, 1899) Philippines, Olango Island96,1 mm
Cardium philotarium (FOSSIL) C.J. Maury, 1924 † Brazil, Rio Pirabas
Dallocardia phlyctaena (FOSSIL) (W.H. Dall, 1900 †) Panama
Laevicardium pictum (E. Ravenel, 1861) Florida14,5 mm
Protocardia piettei (FOSSIL) Fischer, 1969 † France, Picardie, Aisne
Parvicardium pinnulatum (T.A. Conrad, 1831) Alaska
Cardium pisum (FOSSIL) R.A. Philippi, 1887 † Antarctica, King George Island
Parvicardium plagiomorphum (FOSSIL) A.E.M. Cossmann, 1886 † France, Paris Basin9 mm
Trachycardium planicosta (FOSSIL) D.T. Dockery, 1982 † USA, Mississippi27 mm
Americardia planicostata (W.J. Broderip& G.B. I Sowerby, 1833) Ecuador42,6 mm
Trachycardium planicostata (FOSSIL) D.T. Dockery, 1982 † USA, Mississippi, Rankin
Trachycardium plectopleura (FOSSIL) Gardner, 1926 † Florida42 mm
Pseudocatillus pleonexia (FOSSIL) (Davidachvili, 1933 †) Caucasus
Hypanis plicatum (K.E.I. von Eichwald,1829) Black Sea
Nemocardium plumsteadianum (FOSSIL) (Sowerby, 1813 †) UK, England, Hampshire
Pseudocatillus polemonis (FOSSIL) (Schwez, 1913 †)
Microcardium pollostum (FOSSIL) W.P. Woodring, 1982 † Panama, Colón
Europicardium polycolpatum (FOSSIL) (A.E.M. Cossmann& M.A. Peyrot, 1911 †) France, Aquitaine37 mm
Monodacna polymorpha (B.M. Logvinenko& Y.I. Starobogatov, 1967)
Ethmocardium pomeyroli (FOSSIL) (Keen 1954) †
Orthocardium porulosum (FOSSIL) (D.C. Solander, 1766 †) France, Aquitaine10 mm
Orthocardium porulosum hopneri (FOSSIL) M. Glibert & Poel, 1970 † France, Paris Basin46 mm
Orthocardium porulosum subporulosum (FOSSIL) (A.V.M.D. D'Orbigny,1850 †) France, Paris Basin30 mm
Pseudocatillus postdonacoides (FOSSIL) (Davidachvili, 1933 †)
Protocardia praecalva (FOSSIL) Dubar, 1948 †