Third view of unusual crinoid & gastropod

Submitted by: David Thompson
Taxon: Pithocrinus cooperi, Platyceras rarispinum
Submit date: 2011-05-03
Location (approximate): Alpena, Alpena, MI
Stratigraphy: Alpena Formation
Age: Erian (Middle Devonian)
Submitter notes: This third view shows the unusual plate structure of this crinoid calyx with the gastropod visible on top.

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