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ID help on cephalopod from Kansas City Winterset


KCMOfossil

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I found this in the Winterset Limestone of the Pennsylvanian system, Kansas City group near Raytown, MO.  The matrix was quite oolithic.  You may notice from the pictures that I had some trouble reassembling and gluing it after it fell apart, and it may be missing a bit of the small end.  It looks to me like an internal mold of an evolutely coiled cephalopod.  It is about 2 cm x 1.5 cm.  Any ID help will be appreciated.

 

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Thanks, Bullsnake, for the link.  Comparing the photos in the link, my specimen looks similar to Solenochilus.  

 

Russ

1 minute ago, KCMOfossil said:

Solenochilus

Oops, I mean Domatoceras.

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Nice specimen.

 

It probably is Metaoceras. It is the most common type in the Winterset, and its first whorl is loosely coiled.

Context is critical.

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Thanks, Missourian.  I have been fascinated by the materials I have found near Gregory and I-435.  The oolithic matrix makes for some interesting preservations.  Do you agree that this is an internal mold?  By the way, I think you skipped a keystroke; you meant to type Metacoceras.  Thanks for the ID help.

 

Russ

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2 hours ago, KCMOfossil said:

Thanks, Missourian.  I have been fascinated by the materials I have found near Gregory and I-435.  The oolithic matrix makes for some interesting preservations.  Do you agree that this is an internal mold?  By the way, I think you skipped a keystroke; you meant to type Metacoceras.  Thanks for the ID help.

 

Yes, Metacoceras mispeled. :)

 

And yes, the cephalopods are often preserved as internal molds.

Context is critical.

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