Oncoceras
From Wikipedia the free encyclopedia
| Oncoceras Temporal range: Mid -Late Ordovician | |
|---|---|
 | |
| Oncoceras semirubella | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Nautiloidea |
| Order: | †Oncocerida |
| Family: | †Oncoceratidae |
| 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
[edit]- 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 expanding it. |