Schizophoria is a genus of brachiopods that I have not personally collected much. I don't often find it in my preferred Middle Devonian outcrops and am aware of it mostly from the Upper Midwest portion of America. This specimen comes from Milan, MI and is a Schizophoria ferronensis out of the Silica Shale (Devonian, Givetian stage). The large shells of Schizophoria can be identified by their oval outline, fine raidal ribs decorating the surface, wide but shallow sulcus and a shallow triangular dethyrium on the posterior of the pedicle valve.
Here are some other species: Schizophoria schnuri from Poland, Schizophoria iowaensis from Iowa.