Genus Heliophyllum Devonian Horn Coral

Here are some pictures of a Heliophyllum horn coral of unknown species from the Devonian period. I make the identification as Heliophyllum because it was found in Louisville, Kentucky in the Jeffersonville Limestone and the septa have small beads or teeth along the line.

The images go from a close up of the lines to further out of the coral fragment.

Devonian Horn Coral - Siphonophrentis elongata

The following pictures are of a Devonian horn coral called Siphonophrentis elongata first described by C.S. Rafinesque and J.D. Clifford in the 1820 article, Prodrome d' une monographie des Turbinolies fossils du Kentucky (dans l' Amerique Septentrionale) found in Annales Gen. Science, Physics Vol. 5, pages 231-235. It was referred to by them as Turbinolia buceros var. elongata.

This one was found in the Jeffersonville Limestone in Louisville, Kentucky.

Devonian Coral Emmonsia tuberosa

Using Erwin Stumm's Silurian and Devonian Corals of the Falls of the Ohio from 1964 this coral appears to be an Emmonsia tuberosa (originally described by Rominger in 1876 as a Favosites tuberosus). Its pentagonal or hexagonal corallites seem to be about 3 mm wide. There is also evidence of a smaller number of trigonal or tetragonal corallites. Found in Jeffersonville Limestone from central Jefferson County, Louisville, Kentucky.

With the white-gray rock and the straight lines almost parallel it reminds me of an art deco look from the 1920s and 1930s. The hexgonal pillars next to each other somewhat reminds me of the Giant's Causeway in Northern Ireland.