Pterotheca attenuata
By Anomotodon
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This odd species that looks like a trilobite pygidium is actually a gastropod!
Upper Ordovician, Sandbian (Turinian) stage
Platteville formation, McGregor (Grand Detour) member
Roadcut in Green co, Wisconsin
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Photo Information
- Taken with Apple iPhone 15
- Focal Length 6 mm
- Exposure Time 1/120
- f Aperture f/1.6
- ISO Speed 32
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