Heliophyllum Horn Coral

Heliophyllum horn coral found in the Middle Devonian aged Jeffersonville Limestone of Clark County, Indiana. Not sure what species this is, there must be at least 8 of them found in the area.

Heliophyllum ingens Coral

I believe this fossil would be classified as a colonial coral or maybe a cluster of horn corals attached together. The Stumm book on Devonian and Silurian Corals of the Falls of the Ohio (1964) identifies it as a Billingsastraea ingens.  The Falls of the Ohio State Park web site lists as a Heliophyllum ingens (LINK). It was found in the Middle Devonian Boyle Limestone of Nelson County, Kentucky. The fossil can be yours: eBay LINK

Brevispirifer gregarius Textbook Specimen

This Brevispirifer gregarius (Clapp, 1857) is almost a textbook example of a fossil specimen. Included with this posts are the illustrations from Henry Nettelroth's Fossil Shells of the Silurian and Devonian of Kentucky from 1889. That book referred to this fossil as a Spirifera gregaria (Clapp, 1857).  These fossils are used as identification markers for the stratigraphic layers in the Jeffersonville Limestone. Devonian fossil was found in Jefferson County, Kentucky, USA.