This fossil appears to be a Megastrophia concava (Hall, 1857) brachiopod. The surface has some line patterns that might be from some sort of bryozoan like Hederella. Fossil was found middle Devonian period Jeffersonville Limestone of Clark County, Indiana USA.
While exploring the Jeffersonville Limestone
of Clark County, Indiana USA, I found this crinoid calyx fossil. It is probably some sort species of the genus Gennaeocrinus (Wachsmuth & Springer,1881). This fossil dates to the middle Devonian Period.
Recently, I was looking for a trilobite in the Jeffersonville Limestone of Clark County, Indiana USA. I did not find one, at a mostly intact one that is. The best I could do was find this fragment of limestone with part of what is probably a Phacops rana (Green, 1832) fossilized pygidium. Also seen in this piece of limestone is an unidentified bryozoan fossil. These fossils date to the middle Devonian Period.
