Decaschisma Blastoids

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Decaschisma pulchellum

Waldron Shale Formation

Shelby County, IN
Silurian

 

Here is a very rare blastoid from the Waldron Shale Formation. Blastoids are rarely found making it one of the most sought after echinoderms in the Waldron Shale. This distinctive blastoid measures 7/8" long.