Orthoceras

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Showing all 3 results

Orthoceras is a middle Ordovician marine nautiloid whose shell has been fossilized. Scientifically, the term now refers to a specific cephalod from Sweden and the Baltic States, but in the past and and even now it refers to any of a number of species of extinct cephalopod that grew a straight conical shape. Many of the Orthoceras fossils now found are from Morocco.