2.2" Fossil Jellyfish (Essexella) Pos/Neg - Illinois

This is a 2.2" fossil jellyfish (Essexella), preserved in an ironstone nodule, from the Carbondale Formation near Essex, Illinois. This specimen is both the positive (convex) and negative (concave) sides of the fossil. Soft bodied organisms are rare in the fossil record making this specimen a unique addition to a collection.

Essexella is a scyphozoan jellyfish, that is to say a true jelly.