Ohioceras

Ohioceras Temporal range: M Silurian
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	Nautiloidea
Superorder:	Orthoceratoidea
Order:	Orthocerida
Family:	Kionoceratidae
Genus:	Ohioceras Shimazu & Obata, 1935

Ohioceras is an extinct suborthochonic nautiloid from the Silurian of Ohio belonging to the orthoceroid family Kionoceratidae.

Ohioceras is characterized by a slightly curved longiconic shell with a circular to slightly depressed cross section. The surface is lined with broad, low, longitudinal ribs separated by distinct shallow grooves. The siphuncle is subcentral, apparently orthochoanitic.

References

• Sweet, Walter C. 1964. Nautiloidea-Orthocerida. Treatise on Invertebrate Paleontology, Part K. Geological Soc of America, and Univ Kansas Press.
• Ohioceras -Paleobio db.