Glossotherium robustum. Illustration and photo-reconstruction of the North American terrestrial sloth Glossotherium fighting off two Smilodons. Glossotherium was a genus of ground sloth. It was a heavily built animal with a length of about 4 metres snout to tail-tip and a weight estimated at one tonne, and could potentially assume a slight bipedal stance. Fossils of this animal have been found in South America. It is closely related to Paramylodon of North America, whose specimens have often been confused and assigned to Glossotherium, which in turn was initially assigned to Mylodon. Due to its size and strength, Glossotherium would have had few natural predators apart from sabre-toothed cats such as Smilodon. It is believed to have died out in the Pleistocene.