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Silurian Trilobite Cephalon Identification


Kentuckiana Mike

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Attached are pictures of an unidentified trilobite cephalon found in the Waldron Shale of Clark County, Indiana, USA (near Louisville, Kentucky).

This shale dates to the Middle Silurian Period (425-412 million years ago).

What is odd about this find is the protrusion on the front of the cephalon that might be some sort of digging scoop.

A prepared Calymene breviceps is included in one of the pictures for comparison.

My cousin found this specimen a while back and we went through our literature looking for a match with no success.

Thanks for looking and we would appreciate any identification help you can provide. :)

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post-1116-0-83181900-1317744661_thumb.jpg

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After posting I got an e-mail and it was identified as a Spathacalymene sp.

So we got an answer. We thought is some sort of Calymene

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Oh that is a purty one, Mike!

-Dave

__________________________________________________

Geologists on the whole are inconsistent drivers. When a roadcut presents itself, they tend to lurch and weave. To them, the roadcut is a portal, a fragment of a regional story, a proscenium arch that leads their imaginations into the earth and through the surrounding terrain. - John McPhee

If I'm going to drive safely, I can't do geology. - John McPhee

Check out my Blog for more fossils I've found: http://viewsofthemahantango.blogspot.com/

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