Cephalopoda - Ceratitida - Araxoceratidae

Full reference: Y. Bando and M. Ehiro. 1985. Systematic description, in Late Permian ammonoids from the southern Kitakami Massif, northeast Japan. Transactions and Proceedings of the Paleontological Society of Japan, N.S. 137:25-49

Belongs to Prototoceras according to Y. Bando and M. Ehiro 1985

Sister taxa: Prototoceras anfuense, Prototoceras complanatum, Prototoceras diluterotalum, Prototoceras fengchengense, Prototoceras hunanense, Prototoceras inflatum, Prototoceras longilobatum, Prototoceras multidenticulatum, Prototoceras pachygyrum, Prototoceras plicatum, Prototoceras pulchriforme, Prototoceras simplex, Prototoceras venustum, Prototoceras xiangulingense

Type specimen: GLKU-TY-8201. Its type locality is Suenosaki Formation - Ishihama coast, Miyagi Prefecture, which is in a Wuchiapingian offshore shale in the Suenosaki Formation of Japan.

Ecology: nektonic carnivore

Average measurements (in mm): shell width 7.00, shell diameter 25.0