| Alaskoceras Temporal range: Early/lower Ordovician | |
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| Artist's restoration of A. sewardi | |
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| 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.
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