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Orthoceras ("straight horn") is a genus of extinct nautiloid cephalopod. This genus is sometimes called Orthoceratites. Note it is sometimes misspelled as Orthocera, Orthocerus or Orthoceros.

Orthoceras fossils are common and have a global distribution, occurring in any marine rock, especially limestones.

External linksEdit

  • Photo; Article english.fossiel.net–"Explanation of Fossil Types"