Orthoceras exoticum (FOSSIL) Barrande, 1866 †
Orthoceras expansum (FOSSIL) C.H. Blake, 1882 †
Orthoceras fluctuatum (FOSSIL) Salter †
Orthoceras fluminense (FOSSIL) (Meneghini, 1857 †)
Orthoceras ganimedes (FOSSIL) Barrande, 1866 †
Orthoceras geinitzi (FOSSIL) d'Orbigny, 1850 †
Orthoceras gradatum (FOSSIL) C. Gemmellaro, 1889 †
Orthoceras grindrodi (FOSSIL) Blake, 1882 †
Orthoceras hulli (FOSSIL) C. Gemmellaro, 1889 †
Orthoceras hungaricum (FOSSIL) Blake †
Orthoceras kawasakii (FOSSIL) T. Kobayashi, 1928 †
Orthoceras lambi (FOSSIL) J.J.F. Whiteaves †
Orthoceras latissimum (FOSSIL) Portlock †
Orthoceras lentum (FOSSIL) Ruedemann, 1906 †
Orthoceras lepton (FOSSIL) C. Gemmellaro, 1889 †
Orthoceras lesueuri (FOSSIL) A.H. Clarke, 1897 †
Orthoceras luhai (FOSSIL) Stumbur, 1956 †
Orthoceras modestum (FOSSIL) Ruedemann, 1906 †
Orthoceras nakamurai (FOSSIL) T. Kobayashi, 1927 †
Orthoceras nicolleti (FOSSIL) A.H. Clarke †
Orthoceras niissoni (FOSSIL) Boll, 1857 †
Orthoceras novator (FOSSIL) Barrande, 1868 †
Orthoceras oehlerti (FOSSIL) C. Gemmellaro, 1889 †
Orthoceras orientale (FOSSIL) Fliegel, 1901 †
Orthoceras oryx (FOSSIL) Whidborne †
Orthoceras oweni (FOSSIL) Ulrich, 1894 †
Orthoceras pendens (FOSSIL) Blake †
Orthoceras perroti (FOSSIL) A.H. Clarke †
Orthoceras pertinens (FOSSIL) Blake †
Orthoceras planoconvexum (FOSSIL) J.W. Hall †
Orthoceras planodorsatum (FOSSIL) R.P. Whitfield †
Orthoceras primaevum (FOSSIL) (Forbes) †
Orthoceras progressum (FOSSIL) Ruedemann, 1906 †
Orthoceras pulchrum (FOSSIL) Barrande, 1868 †
Orthoceras punjabiense (FOSSIL) L. Waagen, 1879 †