Homalophyllum (Zaphrentis) ungula

These horn corals are on display at the Smithsonian's Museum of Natural History in Washington, D.C.  They are located in the Ancient Seas section on the first floor.  The three specimens are identified as Homalophyllum (Zaphrentis) ungula of the Devonian Period found in Kentucky.

This museum is an amazing national treasure loaded with specimens of all types!  I started with this fossil since I suspect it is from Louisville and probably the Falls of the Ohio.  My visit to the museum was educational and tiring after trying to see as much of the material before they closed for the day.  A later post will overview my visit and impressions of such a grand place once I collect my thoughts and survey the photos taken.

The odd thing is when I type the scientific name Homalophyllum ungula or Zaphrentis ungula into the Smithsonian collections database nothing is found.