As the cold weather is starting to settle in I am looking through the fossils that I collected this year. I have this 14-15mm pyritized brachiopod. Is this the interior of the shell? Are the interiors distinctive from genus to genus? I don't think that I can remove this one from the matrix and was wondering if it could be identified. The first picture is through a microscope and the second isn't. I couldn't hold my hand steady enough on that second one and it is a bit blurry. Thank y