3.9" Fossil Jellyfish (Essexella) In Ironstone, Pos/Neg - Illinois

This is a 3.9", fossil jellyfish (Essexella) preserved in an ironstone nodule from the Carbondale Formation near Essex, Illinois. This specimen contains both the positive (convex) side of the fossil and the accompanying negative impression. The arms and bell (body) of the jelly are what you are seeing. 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.