Orthoceras
Orthoceras
Biota | Animalia | Mollusca | Cephalopoda | Nautiloidea | Orthocerida | Orthoceratoidea | Orthoceratidae | Orthoceratinae | Orthoceras
|  |  | Cuvier, 1795 | Agassiz, 1847 | Kuhn, 1940 | F. McCoy, 1844 | F. McCoy, 1844 | F. McCoy, 1844 | Bruguière, 1789