Megamyonia Brachiopod

These fossils are Megamyonia sp. found in the Maquoketa Formation of Fayette County, Iowa, USA. They existed in the Late Ordovician Period.

Strophodonta Brachiopod

A Strophodonta brachiopod fossil found in the Milwaukee Formation of Wisconsin. This fossil needs to be cleaned as it has some interesting rings on its surface. This might be some sort of coral colony that was growing there or it could be some scattered crinoid rings.
Thanks to Nathan for this fossil.

Bumastus Ioxus Trilobite Cephalon

Here is the mold of a Bumastus ioxus trilobite fossil cephalon found in the Racine Formation middle Silurian Period. It was found in Milwaukee County, Wisconsin, USA. Thanks to Nathan for the fossil.