Submitted by: David Thompson
Taxon: Strophodonta demissa, Hederella concinnoides
Submit date: 2008-05-12
Location (approximate): Milan, Washtenaw, MI
Stratigraphy: Silica Formation
Age: Erian (Middle Devonian)
Submitter notes: This shows the opposite view of Strophodonta demissa with some small Bryozoan, Hederella concinnoides, growing on it.