Phylum: Mollusca
Class: Cephalopoda
Subclass: Nautiloidea
Order: Michelinoceratida
Shown here is initial sort of all specimens of 2 'orthoconic' cephalopod species once named 'Orthoceras. Species (lf-to-rt): (Orthoceras) sp.1, and sp.2 Fenton & Fenton 1924. Note: I just added 1 more of O. sp. 1, not pictured.
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