Sahelanthropus tchadensis is an extinct hominine with some morphology proposed (and disputed) to be as expected of the CHLCA, and it lived some 7 million years ago – close to the time of the chimpanzee–human divergence. This would put the CHLCA split in Southeast Europe instead of Africa. No fossil has yet conclusively been identified as the CHLCA. This group represents "the human clade" and its members are called " hominins". Īll the human-related genera of tribe Hominini that arose after divergence from Pan are members of the subtribe Hominina, including the genera Homo and Australopithecus. Richard Wrangham (2001) argued that the CHLCA species was very similar to the common chimpanzee ( Pan troglodytes) – so much so that it should be classified as a member of the genus Pan and be given the taxonomic name Pan prior. (Wood (2010) discussed the different views of this taxonomy.) A "chimpanzee clade" was posited by Wood and Richmond, who referred it to a tribe Panini, which was envisioned from the family Hominidae being composed of a trifurcation of subfamilies. They classified Homo and all bipedal apes in the subtribe Hominina and Pan in the subtribe Panina. Mann and Weiss (1996), proposed that the tribe Hominini should encompass Pan and Homo, grouped in separate subtribes. Gorilla now became the separated genus and was referred to the new taxon 'tribe Gorillini'. However, later evidence revealed that Pan and Homo are closer genetically than are Pan and Gorilla thus, Pan was referred to the tribe Hominini with Homo. The taxon tribe Hominini was proposed to separate humans (genus Homo) from chimpanzees ( Pan) and gorillas (genus Gorilla) on the notion that the least similar species should be separated from the other two. Main article: Hominini Hominoidea (hominoids, apes)
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