Cephalopoda - Tarphycerida - Estonioceratidae

Alternative combination: Plectoceras sewardense

Belongs to Alaskoceras according to A. K. Miller and B. Kummel 1945

Sister taxa: none

Ecology: fast-moving nektobenthic carnivore

Distribution: found only at On crest of ridge between Cassiterite Creek and Lost River, about 5000’ N.12W. o (Ordovician of Alaska)

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Specimen images are retrieved through the ePANDDA API.