Asymptoceras
| Asymptoceras Temporal range: Mississippian | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Nautiloidea |
| Order: | Nautilida |
| Superfamily: | Aipocerataceae |
| Family: | Aipoceratidae |
| Genus: | Asymptoceras Ryckholt 1852 |
Asymptoceras is an aipoceratid genus (Nautiloidea) similar to Aipoceras but tightly coiled and with only part of the body chamber divergent from the previous whorl. Shell evolute, expanding fairly rapidly; umbilicus open, perforate; whorl section ovoid to subquadrate.
Asymptoceras is known from Mississippian (Lower Carboniferous) sediments in Europe and North America.
References
- Bernard Kummel, 1964. Nautiliodea - Nautilida; Treatise on Invertebrate Paelontology, Part K. Geological Society of America.
- Asymptoceras in Fossilworks