'Hominini' is the
tribe of
Homininae that only includes
humans (''Homo''),
chimpanzees (''Pan''), and their
extinct ancestors. Members of the tribe are called 'hominins' (cf.
Hominidae, "
hominids").
The creation of this taxon is the result of the current idea that the least similar species of a
trichotomy should be separated from the other two. Through
DNA comparison, scientists believe the ''Pan/Homo'' divergence was completed between 5.4 to 6.3 million years ago, after an unusual process of
speciation that ranged over four million years.
[ Human and chimp genomes reveal new twist on origin of species ] It is interesting to note that no fossil species on the ''Pan'' side of the split have been determined; all of the extinct genera listed to the right are ancestral to ''Homo'', or are offshoots of such. However, both ''
Orrorin'' and ''
Sahelanthropus'' existed around the time of the split, and so may be ancestral to both humans and chimpanzees.
In the proposal of Mann and Weiss (1996),
[ Hominoid Phylogeny and Taxonomy: a consideration of the molecular and Fossil Evidence in an Historical Perspective, Mann, Alan and Mark Weiss, , , Molecular Phylogenetics and Evolution, 1996 ] the tribe ''Hominini'' includes ''Pan'' as well as ''Homo'' as separate subtribes. ''Homo'' (and, by inference, all bipedal apes) is by itself only in the subtribe
Hominina, while ''Pan'' is in the
Panina subtribe.
See also
★
Cladistics
★
Human evolution
References