Wednesday, April 8, 2020

Glyptomaria capillaria gastropod from the Moscow formation

Today I have a well preserved example of the Gastropod Glyptomaria capillaria that I found in the Windom shale member of the Moscow formation. It is a high spired shell with a cross hatch kind of patterning along the whorls (a mix of growth lines and striae) and three relatively distinct lines that run in parallel to the whorls. The specimen below is a cast still embedded in shale but is nicely displayed for an easy ID

This specimen was found at a borrow pit on Deep Springs Road in Madison County, NY which exposes the Windom shale member of the Moscow formation (middle Devonian in age, Givetian stage.)

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