Mosaic morphology in the thorax of Australopithecus sediba.

Journal Article (Journal Article)

The shape of the thorax of early hominins has been a point of contention for more than 30 years. Owing to the generally fragmentary nature of fossil hominin ribs, few specimens have been recovered that have rib remains complete enough to allow accurate reassembly of thoracic shape, thus leaving open the question of when the cylindrical-shaped chest of humans and their immediate ancestors evolved. The ribs of Australopithecus sediba exhibit a mediolaterally narrow, ape-like upper thoracic shape, which is unlike the broad upper thorax of Homo that has been related to the locomotor pattern of endurance walking and running. The lower thorax, however, appears less laterally flared than that of apes and more closely approximates the morphology found in humans.

Full Text

Duke Authors

Cited Authors

  • Schmid, P; Churchill, SE; Nalla, S; Weissen, E; Carlson, KJ; de Ruiter, DJ; Berger, LR

Published Date

  • April 2013

Published In

Volume / Issue

  • 340 / 6129

Start / End Page

  • 1234598 -

PubMed ID

  • 23580537

Electronic International Standard Serial Number (EISSN)

  • 1095-9203

International Standard Serial Number (ISSN)

  • 0036-8075

Digital Object Identifier (DOI)

  • 10.1126/science.1234598


  • eng