Alaskoceras

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


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