Asymptoceras
| Asymptoceras Temporal range: Mississippian | |
|---|---|
 | |
| Asymptoceras newloni | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Nautiloidea |
| Order: | Nautilida |
| Family: | †Aipoceratidae |
| Genus: | † Ryckholt, 1852 |
| Species[1] | |
| |
Asymptoceras is a genus of aipoceratids (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
- ^ "Asymptoceras". Paleobiology Database. Retrieved 29 April 2022.
- Bernard Kummel, 1964. Nautiloidea - Nautilida; Treatise on Invertebrate Paleontology, Part K. Geological Society of America.
- Asymptoceras in Fossilworks