Submitted by: Michael Lask
Taxon: Koenenites cooperi
Submit date: 2015-12-20
Location (approximate): Alpena, Alpena, MI
Stratigraphy: Squaw Bay Formation
Age: Senecan (Late Devonian)
Submitter notes: Koenenites cooperi (the largest is 63 mm across) and Bactrite warthini (54 mm long), Squaw Bay, Alpena, Michigan (Devonian). Collected and prepared by Patricia Rutkowski.

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