Strophiops palmeri M.I. Sánchez Roig, 1948
Strophiops panda C.J. Maynard & W.F. Clapp,1921
Strophiops pannosa (C.J. Maynard, 1889)
Cerion paredonis H.A. Pilsbry, 1902
Cerion parva C.J. Maynard, 1894
Cerion pastelilloensis M.I. Sánchez Roig, 1951
Cerion paucicostatum (H.A. Pilsbry, 1929)
Cerion paucicostatum indianorum W.J. Clench, 1934
Strophiops paucisculptum W.J. Clench & C.G. Aguayo,1952
Cerion pauli M. Smith, 1943
Strophiops pepperi P. Bartsch, 1913
Cerion peracutum W.J. Clench & C.G. Aguayo,1951
Cerion peracutum jaumei W.J. Clench & C.G. Aguayo,1953
Strophiops periculosum W.J. Clench, 1934
Strophiops perplexa (C.J. Maynard, 1889)
Strophiops persuasa C.J. Maynard & W.F. Clapp,1921
Strophiops phoenecia C.J. Maynard & W.F. Clapp,1921
Strophiops picta (C.J. Maynard, 1889)
Strophiops picturata C.J. Maynard & W.F. Clapp,1921
Cerion pillsburyi H.A. Pilsbry & E.G. Vanatta,1897
Strophiops pilsbryi C.J. Maynard, 1894
Strophiops pilsbryi evolva C.J. Maynard, 1894
Cerion pineria W.H. Dall, 1895
Cerion pinguis (G. Humphrey, 1797)
Cerion piraticus W.J. Clench, 1937
Strophiops platei W.J. Clench, 1933
Strophiops plebea C.J. Maynard, 1920
Strophiops plegmatum W.H. Dall, 1905
Strophiops polita C.J. Maynard, 1896
Strophiops porcina C.J. Maynard & W.F. Clapp,1921
Cerion portillonis D.A. Welch, 1934
Strophiops praedicta C.J. Maynard & W.F. Clapp,1915
Strophiops praedivina C.J. Maynard, 1913
Cerion prestoni M.I. Sánchez Roig, 1951
Cerion pretiosus M.I. Sánchez Roig, 1951