Crinoid crown

Submitted by: David Thompson
Taxon: Pithocrinus cooperi
Submit date: 2014-10-02
Location (approximate): Alpena, Alpena, MI
Stratigraphy: Alpena Formation
Age: Erian (Middle Devonian)
Submitter notes: This is a nice crown with the calyx 3.8 cm wide and 2.8 cm deep. The overall crown is 8.1 cm long with nice arm definition

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