Monday, April 20, 2020

Prothyris lanceolata pelecypod from the Moscow formation

I need to trim this rock down a bit more but the highlight is the presence of the pelecypod Prothyris lanceolata. It is a small, very narrow shell longer than wide. The anterior end of this right valve is cut off due to where the rock broke but the posterior is intact and shows the sharp oblique curve typical of the species. I found this in the Windom shale of New York.

Specimen #1 - Right valve

Specimen #2 - Left valve

Thess specimens were 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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