Oncoceras
| Oncoceras Temporal range: Mid -Late Ordovician
| |
|---|---|
| |
| Oncocera semirubella | |
| Scientific classification | |
| Kingdom: | |
| Phylum: | Mollusca
|
| Class: | |
| Subclass: | |
| Order: | |
| Genus: | Oncoceras Hall,1847
|
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.
 | This prehistoric nautiloid-related article is a stub. You can help Wikipedia by . |
Categories:
- Prehistoric nautiloid genera
- Ordovician cephalopods
- Middle Ordovician first appearances
- Late Ordovician extinctions
- Paleozoic life of the Northwest Territories
- Paleozoic life of Quebec
- Prehistoric nautiloid stubs