Stratigraphic ranges of Plio-Pleistocene species of the Hominidae

Broken portions of bars represent fossil material tentatively assigned to species.... The species Homo habilis is a somewhat problematic taxonomic entity. Also, the robust australopithecines, A. boisei and A. robustus, may constitute a single species." Note the overlap of Australopithecus and Homo between 1.5 ~ 2.5 MYBP. Neanderthals are usually classified as Homo sapiens neanderthalensis [Stanley 1978]

Text material © 2005 by Steven M. Carr