brach anatomy

[Gen. et sp. indet.]

I found this apparently silicified pedicle valve as an erratic boulder. The age is unknown, but presumably Ordovician or Silurian. Provenance of Baltica (found in Poland, but in gravel parking lot).

Any clues on the order? The rest of the shell is hardly preserved.

Can you help to verify my anatomical identifications?

[Bob Clouser]

It looks like you've already identified all the features I would have. Definitely a brachiopod, and you can make out the hinge line, etc.