Devonian

Moscow Formation

Livingston County, New York, NY, USA

Large 175mm slab with 35mm, 40mm and 34mm phyllocarids.

Phyllocarid.

Elymocaris is a genus of the Subclass Phyllocarida, a group of primitive crustaceans known primarily from isolated carapaces.  It appears to have been restricted to the Early Devonian of the eastern United States.