Traits Taxon list
Orthoceras annulocostatum Meek & Worthen, 1861 † (uncertain > unassessed )
Orthoceras isogramma Meek, 1871 † (uncertain > unassessed )
Orthoceras kinnekullense Foord, 1887 † (uncertain > unassessed )
Orthoceras liaotungense Endo, 1932 † (uncertain > unassessed )
Orthoceras magnichinense Endo, 1932 † (uncertain > unassessed )
Orthoceras mendax Salter, 1859 † (uncertain > unassessed )
Orthoceras menelaus Billings, 1862 † (uncertain > unassessed )
Orthoceras perparvum Billings, 1862 † (uncertain > unassessed )
Orthoceras politum McCoy, 1851 † (uncertain > unassessed )
Orthoceras rectiseptatum Endo, 1932 † (uncertain > unassessed )
Orthoceras regulare (Schlotheim, 1820) †
Orthoceras revalense Foord, 1887 † (uncertain > unassessed )
Orthoceras toyamai Endo, 1932 † (uncertain > unassessed )