I just processed my finds from the Burlington Limestone of southern Iowa. A few finds are still not identified. My hope is that someone can recognize these specimens.
First up is a find that I thought was a crinoid calyx when found. But after a good cleaning, I am wondering if it is a blastoid.
The next identification needed involves these three specimens that I think are crinoid calyxes. They are markedly larger than the typical crinoid calyxes I find in this formation. If so, what species????