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An early Australopithecus afarensis postcranium from Woranso-Mille, Ethiopia

2010; National Academy of Sciences; Volume: 107; Issue: 27 Linguagem: Inglês

10.1073/pnas.1004527107

1091-6490

Yohannes Haile‐Selassie, Bruce M. Latimer, Mulugeta Alene, Alan L. Deino, Luís Gibert, Stephanie M. Melillo, Beverly Z. Saylor, G. R. Scott, C. Owen Lovejoy,

Evolution and Paleontology Studies

Only one partial skeleton that includes both forelimb and hindlimb elements has been reported for Australopithecus afarensis . The diminutive size of this specimen (A.L. 288-1 ["Lucy"]) has hampered our understanding of the paleobiology of this species absent the potential impact of allometry. Here we describe a large-bodied (i.e., well within the range of living Homo ) specimen that, at 3.58 Ma, also substantially antedates A.L. 288–1. It provides fundamental evidence of limb proportions, thoracic form, and locomotor heritage in Australopithecus afarensis . Together, these characteristics further establish that bipedality in Australopithecus was highly evolved and that thoracic form differed substantially from that of either extant African ape.