Asymptoceras
Appearance
Asymptoceras Temporal range: Mississippian
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Asymptoceras newloni | |
Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Cephalopoda |
Subclass: | Nautiloidea |
Order: | Nautilida |
Family: | †Aipoceratidae |
Genus: | †Asymptoceras Ryckholt, 1852 |
Species[1] | |
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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.[citation needed]
Asymptoceras is known from Mississippian (Lower Carboniferous) sediments in Europe and North America.
References
[edit]- ^ "Asymptoceras". Fossilworks. Gateway to the Paleobiology Database. Retrieved 29 April 2022.
![]() | This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. (March 2015) |
- Bernard Kummel, 1964. Nautiloidea - Nautilida; Treatise on Invertebrate Paleontology, Part K. Geological Society of America.
- Asymptoceras in Fossilworks