Cochlioceras

Cochlioceras Temporal range: uL-lM Ordovician
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	Orthoceratoidea
Order:	Orthocerida
Family:	Baltoceratidae
Genus:	Cochlioceras Eichwald (1860)

Cochlioceras is an extinct baltoceratid genus from the lower and middle Ordovician (Arenig - Llanvrin) of what are now Europe, the U.S (Vermont), and China, having existed for approximately 14 million years, from about 478 to 464 mya. ^[1]

Taxonomy

Cochlioceras was named by Eichwald (1860). Its type is Cochlioceras avus. It was assigned to the Baltoceratidae by Furtnish and Glensiter in Teichert et al (1964) ^[1] and removed, with the Baltoceratidae, from the Ellesmerocerida to the Orthocerida by Kroger et al (2007)^[2]

References

1. ^ ^{a b} Teichert et al 1964, Treatise on Invertebrate Paleontology Part K; Nautiloidea - Ellesmerocerida by W.M. Furnish and Brian F. Glenister, pp K129 -K160.
2. ^ Kroger et al 2007; Early orthoceratoid cephalopods from the Argentine Precordillera; Jour Paleo Nov 2007; v. 81; no. 6; p. 1266-1283

• PaleoBiology Database: Cochlioceras, basic info
• Fossils (Smithsonian Handbooks) by David Ward

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