The Homininae and Ponginae separated from each other about 12.5 million years ago in Miocene era. The most well-known fossil genus of Ponginae is Sivapithecus, consisting of several species from 12.5 million to 8.5 million years ago. It differs from orangutans in dentition and postcranial morphology. Sivapithecus was about 1.5 metres (5 ft) in body length, similar in size to a modern orangutan. In most respects, it would have resembled a chimpanzee, but its face was closer to that of an orangutan. The shape of its wrists and general body proportions suggest that it spent a significant amount of its time on the ground, as well as in trees. It had large canine teeth, and heavy molars, suggesting a diet of relatively tough food, such as seeds and savannah grasses. - Info from Wikipedia I do not claim that great grand-uncle Sivapithecus was vegetarian.