As Paleozoic brachiopods go, this is quite a large species.  One can see the ruler in the last picture showing this damaged specimen exce...

Internal view of an Orthospirifer brachiopod fossil found in the Jeffersonville Limestone of Clark County, Indiana.  Animal existed in t...

 Silurian period brachiopods that I have not identified with embedded pyrite crystals.  Last two images should have been stacked plus sti...