Asymptoceras

Asymptoceras; Temporal range: Mississippian
	Asymptoceras newloni
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	Nautiloidea
Order:	Nautilida
Superfamily:	Aipocerataceae
Family:	Aipoceratidae
Genus:	Asymptoceras; Ryckholt, 1852
Species
	A. newtoni Hyatt; A. pyxis Shimanskiy, 1967; A. tschernovi Shimanskiy, 1990;

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

Bernard Kummel, 1964. Nautiloidea - Nautilida; Treatise on Invertebrate Paleontology, Part K. Geological Society of America.
Asymptoceras in Fossilworks

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