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Aphetoceras

genus

Sensitive Classification

Fossils are sensitive in nature and should not be collected unless it is done legally and responsibly. Vertebrate fossils are illegal to collect on public lands.

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On Wikipedia

Aphetoceras is a genus of tarphycerid cephalopod within the Estonioceratidae; loosely coiled without an impression along the dorsal margin; early whorls barely reaching, separating then diverging in the final mature whorl; weakly ribbed in some. The cross section of Aphetoceras is higher than wide, making it compressed in form. The dorsum, along the inner curve, is more broadly rounded than the venter which lies along the outer curve. The siphuncle is relatively large, located near but not at the ventral margin; lined with secondary deposits. Chambers are empty. Aphetoceras is similar in outline to the related Estonioceras and Alaskoceras but most similar in cross section to Clytoceras. Aphetoceras comes from the Lower Ordovician of North America and Australia and is one of the earlier…

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Formations Found In

Smithville Dolomite

Powell Dolomite

Jefferson City Dolomite

Cotter Dolomite

Smithville Dolomite, Powell Dolomite, Cotter Dolomite, Jefferson City Dolomite (MOOjc;0)

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Aphetoceras

Aphetoceras

Aphetoceras