Heteroschisma subtruncatum from Alpena

Submitted by: David Thompson
Taxon: Heteroschisma subtruncatum
Submit date: 2010-05-04
Location (approximate): Alpena, Alpena, MI
Stratigraphy: Thunder Bay Formation
Age: Erian (Middle Devonian)
Submitter notes: Although a rather common species from the Thunder Bay Limestone of Alpena, This blastoid has not been added to the site before. It is 5/8 inch (15.3 mm) long by 3/8 inch (8.6 mm) wide

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