Mylodon

Mylodon is an extinct genus of giant ground sloth that lived in the Patagonia area of South America until roughly 10,000 years ago.

Taxonomy
Mylodon's close relatives include the giant ground sloths of the genera Glossotherium and Paramylodon. The latter genus has often been confused with Glossotherium but Paramylodon is a distinct genus that was restricted to the Pleistocene of North America.[1] Glossotherium also shares a long history of taxonomic confusion with Mylodon, and currently the only recognized species is Mylodon darwinii. At one time, the elephant-sized Megatherium was thought to be closely related, but is recognized as belonging to a separate family (Megatheriidae).

Description
Mylodon weighed about 2,500 kilograms (5,500 lb) and stood up to 3 m (10 ft) tall when raised up on its hind legs. It had very thick hide and had osteoderms within its skin for added armor. Because of this armor and its long and sharp claws, it is unlikely that the Mylodon had any natural enemies other than humans, who would have still found the skin difficult to pierce with stone projectile points.