'Giant' Heteroschisma Blastoid

Submitted by: Scott Vergiels
Taxon: Heteroschisma alatum
Submit date: 2007-11-04
Location (approximate): Alpena, Alpena, MI
Stratigraphy: Potter Farm Formation
Age: Erian (Middle Devonian)
Submitter notes: At about 19mm this blastoid is about twice the usual size for this species.

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