Devonochonetes fragilis brachiopod from the Silica Shale

As comparison to the previous Devonochonetes coronatus, here is Devonochonetes fragilis from the Silica Shale (Devonian, Givetian stage) of Sylvania, OH. The difference between this species and D. coronatus appears to be the number and thickness of the rays that extend from the hinge line. At least this is what I can discern from just a visual perspective since they are both about the same size and shape.

Pedicle valve

Anterior

Brachial valve

Posterior

Profile