Megatherium ("Great Beast") was a genus of elephant-sized ground sloths endemic to Central and South America that lived from the late Pliocene through the end of the Pleistocene. Its size was exceeded by only a few other land mammals, including mammoths. There have been alleged sightings of the Giant Ground Sloth reported in the Amazon Rainforest of South America.
Procoptodon, also known as the Giant Short-faced Kangaroo. It lived in Australia and went extinct with other Australian megafauna after humans reached Australia 50,000 years ago. Procoptodon, Peter Trusler