Rhineoderma nystii (FOSSIL) de Koninck, 1883 †
Cyclonema obsolescens (FOSSIL) J.W. Hall, 1876 †
Strophostylus obtusus (FOSSIL) J.W. Hall, 1859 †
Keeneia occasa (FOSSIL) E.M. Fletcher 1958 †
Keeneia ocula (FOSSIL) (Sowerby, 1838 †)
Platyceras oehlerti (FOSSIL) Spitz, 1907 †
Praenatica orthostoma (FOSSIL) (Barrois, 1889 †)
Platyschisma ovoidea (FOSSIL) (B. Phillips, 1836 †)
Platyceras oxynotum (FOSSIL) Girty, 1929 †
Platyceras paralium (FOSSIL) White & R.P. Whitfield,1862 †
Platyceras parasiticum (FOSSIL) Trautschold, 1867 †
Cyclonema parvimedium (FOSSIL) McLearn, 1924 †
Spinyplatyceras parvispinum (FOSSIL) (B.F. Howell, 1945 †)
Platyostoma pastillus (FOSSIL) A.H. Clarke, 1909 †
Platyceras patelliforme (FOSSIL) Holzapfel, 1895 †
Nonorios pater (FOSSIL) (J. Perner, 1903 †)
Spinyplatyceras paxiller (FOSSIL) (A.H. Clarke, 1908 †)
Nonorios pectinata (FOSSIL) (J. Perner, 1903 †)
Cyclonema percarinata (FOSSIL) (J.W. Hall, 1847 †)
Platyostoma perceense (FOSSIL) A.H. Clarke, 1908 †
Cyclonema percingulatum (FOSSIL) Billings, 1857 †
Platyostoma perforatum (FOSSIL) J.J.F. Whiteaves, 1904 †
Platyceras pericompsus (FOSSIL) (Whidborne, 1891 †)
Stuckenbergispira permocarbonicus (FOSSIL) (Stuckenberg, 1898 †)
Platyceras perneri (FOSSIL) Tolmachoff, 1930 †
Obscuropsis perplexa (FOSSIL) Horný, 1992 †
Brokenriveria pharlapensis (FOSSIL) Cook & Camilleri, 1997 †
Rhineoderma piasaensis (FOSSIL) (J.W. Hall, 1856 †)
Palaeocapulus piso (FOSSIL) (Walcott, 1884 †)
Keeneia platyschismoides (FOSSIL) R. Etheridge jr., 1902 †
Platyceras platystomum (FOSSIL) J.W. Hall, 1859 †
Platyostoma plebeium (FOSSIL) J.W. Hall, 1876 †
Platyostoma pleurotoma (FOSSIL) J.W. Hall, 1879 †
Platyceras plicatile (FOSSIL) J.W. Hall, 1879 †
Cyclonema praecipitum (FOSSIL) (Ulrich & Scofield,1897 †)