Schizodus or composita?

[coled18]

Hi all, 

I just need help on confirming this specimen. I think it is a composita (brachiopod) rather than a schizodus (bivalve). There is a depression on the shell's surface going down the middle, but it is hard to see. Thanks again! This was found in NE Kansas.

[coled18]

[FossilDAWG]

It is clearly a brachiopod, and I would agree with Composita.

 

Don

[coled18]

Perfect! Thanks.