Trochita paucicostata (FOSSIL) B.M. Landau, F. Da Silva& S.M. Heitz, 2016 †
Crucibulum pectinatum P.P. Carpenter, 1856
Calyptraea pellucida (L.A. Reeve, 1859)
Sigapatella perampla (FOSSIL) (Powell & J.A. Bartrum,1929 †)
Crepidula perforans (A. Valenciennes, 1846)
Crucibulum personatum A.M. Keen, 1958
Crepipatella peruviana (J.B.P.A. Lamarck, 1822)
Crepidula philippiana V.A. Gallardo, 1977
Crucibulum pileolum (FOSSIL) Lea, 1843 †
Trochita pileolus d'Orbigny, 1841
Trochita pileus (J.B.P.A. Lamarck, 1822)
Crucibulum piliferum (FOSSIL) R.J.L. Guppy, 1867 †
Calyptraea placuna (FOSSIL) R. Tate, 1893 †
Crepidula plana T. Say, 1822
Crucibulum planum (FOSSIL) H.C.F. Schumacher, 1817 †
Crepidula porcellana J.B.P.A. Lamarck, 1801
Crepidula porcellana sulin (P. Dautzenberg, 1912)
Crepidula praerupta (FOSSIL) T.A. Conrad, 1849 †
Crepidula pretrei (A.V.M.D. D'Orbigny,1841)
Crepidula princeps (FOSSIL) T.A. Conrad, 1855 †
Bostrycapulus pritzkeri R. Collin, 2005
Maoricrypta profunda (FOSSIL) (F.W. Hutton, 1873 †)
Crepidula protea d'Orbigny, 1941
Calyptraea pseudodeformis (FOSSIL) Baldi, 1966 †
Crepidula pyguaia L.R.L. Simone, 2006
Crucibulum quiriquinae (R.P. Lesson, 1830)
Maoricrypta radiata (FOSSIL) (F.W. Hutton, 1873 †)
Crucibulum ramosum (FOSSIL) (T.A. Conrad, 1842 †)
Calyptraea ramsisi (FOSSIL) Abbass, 1967 †
Crepidula recurvirostra (FOSSIL) T.A. Conrad, 1870 †
Bicatillus renovata (FOSSIL) J.C.H. Crosse & Fischer,1923 †
Crepidula roseae (FOSSIL) E.J. Petuch, 1991 †
Crepidula rostrata C.B. Adams, 1852
Calyptraea rugosa (FOSSIL) Noetling, 1895 †
Crepidula rugosa H.E. Anton, 1838