Monday, December 28, 2009

Unidentified Horn Coral

This horn coral was found in Clark County, Indiana. It is of the Devonian Period and I am still try to figure out its identification.

UPDATE (2021): This could be a Bordenia knappi (Hall, 1882). Found in the Speed Limestone of Clark County, Indiana USA.




Shamalama said...

Could it be related to Acathophyllum?

Kentuckiana Mike said...

I am not sure. Do you have any references that describe the Acathophyllum?