Devonian
Moscow Formation
Livingston County, New York, NY, USA.

84mm slab with 43mm phyllocarid.

Phyllocarid. Arthropod.

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.