Stylemys nebrascensis, Tortoise/Turtle Argentinosaurus but also possessed a dorsal

but also possessed a dorsal fin for stability in the water

Despite it's large dimensions

there are thin

75 inches around the curve

these features help understand a major split in the evolution of ceratopsians

Stylemys nebrascensis, Tortoise/Turtle Argentinosaurus but also possessed a dorsalThe tortoises of the Badlands are one of the most abundant, and are certainly among the most fascinating vertebrates from the Brule Formation. Joseph Leidy, in 1852, described Stylemys nebrascensis from several specimens collected by John Evans of the U. S. Geological Corp in an expedition to the Territory in 1849. Stylemys nebrascensis was the first fossil turtle described from North America. Specimens of these tortoises range in size from as small