.9" Rare Edrioasteroid (Lepatocystis) Fossil - Brandon, Iowa

This is a rare, Edrioasteroid (Lepatocystis) fossil from the Cedar City Formation in Iowa. It's .9" wide and nicely preserved.

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.