The lack of an adequate hominid fossil record in eastern Africa between 2 and 3 million years ago (Ma) has hampered investigations of early hominid phylogeny. Discovery of 2.5 Ma hominid cranial and dental remains from the Hata beds of Ethiopia's Middle Awash allows recognition of a new species of
Australopithecus
. This species is descended from
Australopithecus afarensis
and is a candidate ancestor for early
Homo
. Contemporary postcranial remains feature a derived humanlike humeral/femoral ratio and an apelike upper arm–to–lower arm ratio.