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Isorophusella incondita Age: Ordovician Formation: Bobcaygeon Formation Location: Ontario, Canada Size: Edrio is 1.2 inches across This specimen is not for sale Click here for similar specimens that are for sale
Here is a very unusual edrioasteroid from the Ordovician of Canada. There is a large Isorophusella incondita on the plate. Edrioasteroids were primitive echinoderms which consisted of a flexible theca composed of numerous polygonal plates. This edrioasteroid exhibits fine detail - the outer rings of small plates are beautifully displayed, and the ambulacral plates are unusually well defined. The cream-colored fossil contrasts nicely with the grey matrix. The edrio is well presented on the squared slab of hard limestone. This is a very fine example of this uncommon echinoderm from Canada.