Megatherium is an extinct genus of large ground sloths endemic to South America that lived from the Late Pliocene through the end of the Late Pleistocene. It is best known for the elephant-sized, 3.5–4 tonnes (7,700–8,800 lb) type species Megatherium americanum, which is primarily known from the Pampas, but which ranged southwards to northernmost Patagonia and northwards to southern Bolivia during the late Middle Pleistocene and Late Pleistocene. Various other species have been described, including those belonging to the Andean subgenus Pseudomegatherium, which range in size from comparable to M. americanum down to approximately 1 tonne (2,200 lb).