Blastoid

Submitted by: John Topor
Taxon: Hyperoblastus bassleri
Submit date: 2009-02-05
Location (approximate): Alpena, Alpena, MI
Stratigraphy: Thunder Bay Formation
Age: Erian (Middle Devonian)
Submitter notes: One of four different genera that are found in this formation. This is a large specimen for the species. It measures 25.6mm high x 15mm at the widest point.

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