.35" Edrioasteroid Fossil - Crawfordsville, Indiana

This is an rare Edrioasteroid fossil from the crinoid beds near Crawfordsville, Indiana.

Edrioasteroids are an extinct class of echinoderms that lived from the Ediacaran until the Permian, about 300 million years ago. The living animal would have resembled a pentamerously symmetrical disc or cushion.