Two Edrioasteroids (Isorophusella) - Ontario

This is a duo of Edrioasteroid (Isorophusella incondita) fossils from the Verulam Formation of Ontario.

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.