Crinoid Calyx with Spined Gastropod

Submitted by: Pat Rutkowski
Taxon: Pithocrinus cooperi, Platyceras rarispinum, Favosites sp.
Submit date: 2008-03-12
Location (approximate): Alpena, Alpena, MI
Stratigraphy: Alpena Formation
Age: Erian (Middle Devonian)
Submitter notes: The gastropod sits atop the crinoid calyx near a Favosites coral. The entire specimen measures 83mm x 62mm.

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