Coelocyclus novaeki (FOSSIL) J. Perner, 1903 †
Coelocyclus novaki (FOSSIL) J. Perner, 1903 †
Cymbularia nuciformis (FOSSIL) J. Perner, 1903 †
Cymbularia nummulina (FOSSIL) E.F.R.K. Koken& J. Perner, 1925 †
Ptychosphaera obesa (FOSSIL) Wang, 1980 †
Sphenosphaera opertus (FOSSIL) (Foerste, 1893 †)
Bellerophon orientalis (FOSSIL) de Koninck, 1863 †
Coelocyclus ornatus (FOSSIL) Northrop, 1939 †
Bellerophon oteroensis (FOSSIL) E.L. Yochelson, 1960 †
Ptychosphaera ouralicus (FOSSIL) (Murchison & al., 1845 †)
Praematuratropis ovatus (FOSSIL) Rollins & al., 1971 †
Bellerophon panneus (FOSSIL) White, 1862 †
Dicellonema panxianensis (FOSSIL) Yu, 1980 †
Bellerophon parvicristus (FOSSIL) E.L. Yochelson, 1960 †
Bellerophon patersoni (FOSSIL) J.W. Hall, 1862 †
Bellerophon pelops (FOSSIL) J.W. Hall, 1862 †
Bellerophon pennatus (FOSSIL) R. Etheridge jr., 1907 †
Pharkidonotus percarinatus (FOSSIL) (T.A. Conrad, 1842 †)
Bellerophon permianus (FOSSIL) Netchaev, 1894 †
Joleaudella perstriatus (FOSSIL) (Foerste, 1924 †)
Semilukispira petinensis (FOSSIL) (Nalivkin, 1930 †)
Bellerophon pisum (FOSSIL) A.C. Chapman, 1916 †
Bellerophon pitkinensis (FOSSIL) Snider, 1915 †
Bellerophon planoconvexus (FOSSIL) Mansuy, 1912 †
Bellerophon planodorsatum (FOSSIL) Hoare, 1961 †
Sphenosphaera platystoma (FOSSIL) (F.B. Meek& A.H. Worthen, 1868 †)
Prosoptychus plenus (FOSSIL) (Billings, 1874 †)
Waagenella plummeri (FOSSIL) E.L. Yochelson, 1960 †
Bellerophon politus (FOSSIL) L. Waagen, 1880 †
Prosoptychus projectus (FOSSIL) J. Perner, 1903 †
Bellerophon propinquus (FOSSIL) F.B. Meek, 1871 †
Cymbularia pygmaea (FOSSIL) E.F.R.K. Koken& J. Perner, 1925 †
Bellerophon pygmaeus (FOSSIL) d'Eichwald, 1859 †
Bellerophon qinglongensis (FOSSIL) Wang, 1980 †
Bucanopsis qinglongensis (FOSSIL) Wang, 1980 †