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Dundee Limestone NW Ohio Oncocerid Id.


Curt P

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Hello,  The Dundee location I frequent is quite rich in Cephalopods.  Acleistoceras is the common Oncocerid.  This is not that.  I'm assuming this is an Oncocerid as well, and I am keeping my set of possibilities to those reported in the Treatise as occurring in Ohio.  I'm assuming the third pic is the venter.  If so, the siphuncle runs ventrally.  I'm hoping that the deeply 'dipping' septa forming a neat downward 'V' pattern in the sides is recognizable to someone.  Based on Ohio possibilities, I land on Exocyrtoceras.  I have also attached pics of those pages from the Treatise.  I'd love to hear from anyone with knowledge.

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Posted (edited)

It looks like an Orthocone fossil of some sort to me, but I’m not sure about the species.

Edited by Maximus the rock hunter
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I’m thinking it’s an orthoceras fossil.

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