Crinoid calyx

Submitted by: Joseph Koniecki
Taxon: Megistocrinus nodosus
Submit date: 2012-01-11
Location (approximate): Alpena, Alpena, MI
Stratigraphy: Thunder Bay Formation
Age: Erian (Middle Devonian)
Submitter notes: The picture is a view of both sides of the same specimen. The calyx is 5 cm across.

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