Alaskoceras
Alaskoceras Temporal range: Early/lower Ordovician | |
---|---|
Scientific classification | |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Cephalopoda |
Subclass: | Nautiloidea |
Order: | Tarphycerida |
Family: | Estonioceratidae |
Genus: | Alaskoceras Miller & Kummel, 1945 |
Alaskoceras is a genus of lower Ordovician coiled nautiloid cephalopods; the shell moderately expanded, ribbed, with a divergent living chamber; whorl section more broadly rounded ventrally than dorsally; siphuncle marginal at maturity, septal necks short, almost achoanitic; connecting rings thick, layered.
Alaskcoceras belongs to the Tarphycerida, and to the family Estonioceratidae. It was found in Alaska.
References
- W.M Furnish & Brian F. Glenister, 1964. Nautiloidea-Tarphycerida. Treatise on Invertebrate Paleontology, Part K. Geological Society of America and University of Kansas Press.
This article is issued from
Wikipedia.
The text is licensed under Creative Commons - Attribution - Sharealike.
Additional terms may apply for the media files.