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BobWill

586237876_bellerophontid2.thumb.jpeg.d2eca8be79247ee180b7c1e8921b37b7.jpeg

 

225057002_Bellerophontid1.thumb.jpeg.a68b23879ab549ac437019eba475f281.jpeg

 

 

I found this in Texas, near Lake Bridgeport, in the Jasper Creek Formation, Canyon Group, Missouri Series, Pennsylvanian Sub-period.

 

The flared lip, think shell and absence of obvious sutures or septa tell me it is more likely to be a Bellerophontid gastropod than a cephalopod. The open umbilicus and the large size is making a firm ID difficult. Any ideas?

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  • 2 weeks later...

Probably won’t be able to get an ID from a steinkern. Yochelson said that identification from a steinkern in this family should not be trusted as experts can’t often tell Bellerophon and Knightites apart in that state of preservation.

 

If there is any shell ornament at all, perhaps we can at least place it in a family.

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