Pongidae, or the Pongids, is an obsolete primate taxon containing the gorillas, gibbons, chimpanzees, and orangutans. They are sometimes called 'great apes'. Pongidae is now known to be paraphyletic. Pongids split from Hominina around seven mya. The corresponding crown group for this taxon is Hominidae. Pongidae has seven extant member species. This taxon is rarely used today but is of historical significance. The pongid skull contains the following features that are absent or less pronounced in humans: