Ancylotherium was a fairly close relative of Chalicotherium, a Chalicothere that like others, had been highly successful during the Oligocene. By the the time of the Pliocene though, they had all declined, however, and Ancylotherium itself lived only in parts of Africa, beside some of our ancestors, like Australopithecus, Homo habilis, Homo rudolfensis , and Paranthropus boisei. They were herbivores, and their sheer size as adults would have probably protected them from any African predator, though juveniles would possibly be at risk from Crocodiles, Dinofelis and Megantereon (the african Smilodon). One of the very last of the Chalicotheres, Ancylotherium is even rumored to have survived into the modern times - the fabled Nandi Bear. This is part of Cryptozoology though, and so is not scientifically recognised, nor does it have the same cryptozoology status as the Yeti or Loch Ness Monster.