The Zen Den San Pedro
Orthoceras Specimen -Assorted
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Orthoceras Polished Stone -Assorted
Orthoceras is a genus of extinct nautiloid cephalopod restricted to Middle Ordovician-aged marine limestones of the Baltic States and Sweden. This genus is sometimes called Orthoceratites. Note it is sometimes misspelled as Orthocera, Orthocerus or Orthoceros.