This is a beautifully preserved female tortoise fossil of Stylemys nebracensis. It slowly plodded over the temperate area of South Dakota about 30 million years ago in an area known as the White River Badlands of South Dakota. Today the badlands are a series of highly eroded hills and gullies of light colored sedimentary layers. Stylemys was the first species of fossil tortoise to be discovered and described in North America.
Dimensions: 8.25 inches, 21 cm (length) x 6.25 inches, 15.5 cm (width) x 4 inches, 10 cm (height), weight = 9 lb. or 4095 grams. Minimal restoration – less than five percent. It also has a fossilized leg bone (Femur).
Name: Stylemys nebrascensis Geologic Age: Oligocene (30-35 Million Years Old) Locale: Brule Formation, White River Badlands Group, South Dakota