Oncoceras
| Oncoceras Temporal range: Mid -Late Ordovician
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| Genus: | Oncoceras Hall,1847
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Oncoceras is a genus of oncocerids, family Oncoceratidae from the middle and upper Ordovician of North America and Europe.
The shell, or conch, of Oncoceras is relatively short, a curved, compressed brevicone with a maximum width in the phragmocone just behind the body chamber, narrowing toward the aperture. The siphuncle is small, necks recurved.
References
- Waltre C. Sweet, 1964. Nautiloidea-Oncocerida. Treatise on Invertebrate Paleontology, Part K. Geological Society of America.
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Categories:
- Prehistoric nautiloid genera
- Ordovician cephalopods
- Middle Ordovician first appearances
- Late Ordovician extinctions
- Fossils of Michigan
- Fossils of Indiana
- Fossils of Kentucky
- Fossils of New York (state)
- Fossils of Ohio
- Paleozoic life of the Northwest Territories
- Paleozoic life of Quebec
- Prehistoric nautiloid stubs