Gigantopithecus is an extinct genus of ape that lived in southern China from 2 million to approximately 300,000-200,000 years ago during the Early to Middle Pleistocene, represented by one species, Gigantopithecus blacki. From Wikipedia
The Gigantopithecus blacki, the largest primate ever, went extinct due to its struggle to adapt its food habits to environmental changes, a new study finds.