Tyrannophontes theridionSubphylum Crustacea, Class Malacostraca, Family Tyrannophontidae Geological Time: Mississippian (~320 m.y.a.) Size: Fossil is 93 mm (curve measure); Matrix: 150 mm by 153 mm Fossil Site: Heath Shale Formation, Bear Gulch Limestone, Fergus County, Montana Code: BGF566 Price: Sold |
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