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Alaskoceras
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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