Orthoceras
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| phylum | Mollusca | Orthoceras ("straight horn") is a genus of extinct nautiloidcephalopod 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.
For more information, visit the Wikipedia entry. Get back to Nautiloidea |
| class | Cephalopoda | |
| subclass | Nautiloidea | |
| order | †Orthocerida | |
| family | †Orthoceratidae | |
| genus | †Orthoceras |
