Here is a button coral called Hadrophyllum orbignyi (Edwards & Haime, 1851) from the Devonian Period. It was found in Clark County, In...

Here is the calyx (top part of) a crinoid that existed in the Mississippian or Carboniferous Period. This one was found at Lake Cumberland,...

Here is a blastoid called Pentaremites welleri that existed in the Mississippian or Carboniferous Period. This one was found in Indian Spr...