Cyrtina umbonata alpenensis

Submitted by: David Thompson
Taxon: Cyrtina umbonata alpenensis
Submit date: 2014-05-12
Location (approximate): Milan, Washtenaw, MI
Stratigraphy: Silica Formation
Age: Erian (Middle Devonian)
Submitter notes: These examples of this Cyrtina are from the old Martin-Marietta quarry of Silica shale spoil piles in Milan, Mi. This closed area has a large number of these particular Cyrtinas. These were just collected in 2014.

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