Nautiloidea indetPhylum Mollusca, Class Cephalopoda, Subclass Nautiloidea, Order Nautilida Geological Time: Mississippian (~320 m.y.a.) Size (25.4 mm = 1 inch): Fossil is 45 mm long by 10 mm across Matrix: 60 mm by 60 mm Fossil Site: Heath Shale Formation, Bear Gulch Limestone, Fergus County, Montana Code: BGF459 Price: $45.00 |
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