ISBN 978-0-495-38190-7. H. erectus may have appeared some 2 millionyearsago. Fossils dated to as much as 1.8 millionyearsago have been found both in Africa and in Southeast
Ponginae is Sivapithecus, consisting of several species from 12.5 million to 8.5 millionyearsago. It differs from orangutans in dentition and postcranial morphology