Name:
Isorophusella incondita
Age: Ordovician
Formation: Bobcaygeon Formation
Location: Simcoe County, Ontario, Canada
Size: Plate is 1.6" X 2.6"
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Here is an unusual double plate of edrioasteroids from the Ordovician of Canada. There are two very good specimens of Isorophusella incondita on the slab. Edrioasteroids were primitive echinoderms which consisted of a flexible theca composed of numerous polygonal plates. These edrioasteroids exhibit fine detail. The outer rings of small plates are beautifully displayed, and the ambulacral plates are unusually well defined. The cream-colored fossils contrast nicely with the gray matrix. They are well presented on the rectangular slab of hard limestone. This is a very fine plate of these uncommon echinoderms from Canada.
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