Postcranial material from Ardipithecus,the earliest widely accepted hominin genus (5.8-4.4 m.y.a.),indicates a capacity-albeit an imperfect one-for upright bipedal locomotion.

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Postcranial material refers to the bones below the skull. In this case, the postcranial material from Ardipithecus indicates that this early hominin had some ability to walk upright on two legs, although it was not fully efficient or perfected yet. This is why Ardipithecus is considered an important transitional form in human evolution.

Postcranial Material from Ardipithecus,the Earliest Widely Accepted Hominin Genus (5