Any of various extinct herbivorous mammals of the group Edentata or Xenarthra of the Oligocene Epoch through the Holocene Epoch that inhabited South and North America. Some ground sloths, including megatherium, were very large. Also called giant ground sloth .
Arthur Smith Woodward sums up the question in Proceedings of the Zoological Society of London, closing with this sentence: "If we accept the confirmatory evidence afforded by Mr Spencer Moore, we can hardly refuse to believe that this ground-sloth was kept and fed by an early race of men."
In a cave near Consuelo Cove, southern Patagonia, have been found fragments of the skin and bones of a large ground-sloth, Grypotherium (Neomylodon) listai, associated with human remains.
A presumed large ground-sloth from Madagascar has been described, on the evidence of a limb-bone, as Bradytherium, but it is suggested by Dr F.
Brown A New Genus of Ground-Sloth from the Pleistocene of Nebraska, Bull.