"Foerstephyllum vacuum (fossil coral) (Liberty or Whitewater Formation, Upper Ordovician; Cincinnati region, USA)."
James St. John, CC BY 2.0 via Flickr: https://flic.kr/p/2pRSnPp
Foerstephyllum vacuum (fossil coral) (Liberty or Whitewater Formation, Upper Ordovician; Cincinnati region, USA)
Foerstephyllum vacuum (Foerste, 1909) - fossil colonial coral from the Ordovician of the Cincinnati region, USA. The famous Cincinnatian Series of the tristate area of Ohio-Kentucky-Indiana has some of the richest fossiliferous rocks on Earth.Flickr