Chebbioceras erfoudense (FOSSIL) Klug & al., 2008 †
Orthoceras etheridgei (FOSSIL) Blake †
Orthoceras eutrichum (FOSSIL) Whidborne †
Orthoceras evanescens (FOSSIL) Barrande, 1866 †
Orthoceras exoticum (FOSSIL) Barrande, 1866 †
Orthoceras expansum (FOSSIL) C.H. Blake, 1882 †
Theoceras filondouzense (FOSSIL) Kröger, 2008 †
Pojetoceras floweri (FOSSIL) M.A. Frey, 1995 †
Orthoceras fluctuatum (FOSSIL) Salter †
Orthoceras fluminense (FOSSIL) (Meneghini, 1857 †)
Striatocycloceras foerstei (FOSSIL) (Teichert, 1930 †)
Orthoceras ganimedes (FOSSIL) Barrande, 1866 †
Orthoceras geinitzi (FOSSIL) d'Orbigny, 1850 †
Ogygoceras gracile (FOSSIL) Ulrich & al., 1944 †
Orthoceras gradatum (FOSSIL) C. Gemmellaro, 1889 †
Orthoceras grindrodi (FOSSIL) Blake, 1882 †
Orthoceras hulli (FOSSIL) C. Gemmellaro, 1889 †
Orthoceras hungaricum (FOSSIL) Blake †
Striatocycloceras isbergi (FOSSIL) Kröger, 2013 †
Kopaninoceras jucundum (FOSSIL) (Barrande, 1870 †)
Orthoceras kawasakii (FOSSIL) T. Kobayashi, 1928 †
Palorthoceras kayseri (FOSSIL) Kröger & al., 2007 †
Infundibuloceras komiense (FOSSIL) (P.A. Zhuravleva, 1978 †)
Orthoceras lambi (FOSSIL) J.J.F. Whiteaves †
Trematoceras lateseptatum (FOSSIL) (J. Von Hauer, 1846 †)
Orthoceras latissimum (FOSSIL) Portlock †
Orthoceras lentum (FOSSIL) Ruedemann, 1906 †
Orthoceras lepton (FOSSIL) C. Gemmellaro, 1889 †
Orthoceras lesueuri (FOSSIL) A.H. Clarke, 1897 †
Infundibuloceras longicameratum (FOSSIL) Kröger, 2008 †
Orthoceras luhai (FOSSIL) Stumbur, 1956 †
Infundibuloceras mira (FOSSIL) (P.A. Zhuravleva, 1978 †)
Orthoceras modestum (FOSSIL) Ruedemann, 1906 †
Infundibuloceras mohamadi (FOSSIL) Kröger, 2008 †
Orthoceras nakamurai (FOSSIL) T. Kobayashi, 1927 †