Orthocycloceras is an extinct genus of actively mobile carnivorous cephalopods, essentially a Nautiloid, that lived in what would be Europe during the Silurian to Devonian from 428.2 to 412.3 mya, existing for approximately 15.9 million years.[1]
| Orthocycloceras | |
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| Genus: | Orthocycloceras
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Taxonomy
editOrthocycloceras was assigned to Orthocerida Sepkoski (2002).[2]
Morphology
editThe shell is usually long, and may be straight ("orthoconic") or gently curved. In life, these animals may have been similar to the modern squid, except for the long shell.
Fossil distribution
editReferences
edit- ^ PaleoBiology Database: Orthocycloceras, basic info
- ^ J. J. Sepkoski. 2002. A compendium of fossil marine animal genera. Bulletins of American Paleontology 363:1-560
