Mechanical evidence that Australopithecus sediba was limited in its ability to eat hard foods.

Journal Article (Journal Article)

Australopithecus sediba has been hypothesized to be a close relative of the genus Homo. Here we show that MH1, the type specimen of A. sediba, was not optimized to produce high molar bite force and appears to have been limited in its ability to consume foods that were mechanically challenging to eat. Dental microwear data have previously been interpreted as indicating that A. sediba consumed hard foods, so our findings illustrate that mechanical data are essential if one aims to reconstruct a relatively complete picture of feeding adaptations in extinct hominins. An implication of our study is that the key to understanding the origin of Homo lies in understanding how environmental changes disrupted gracile australopith niches. Resulting selection pressures led to changes in diet and dietary adaption that set the stage for the emergence of our genus.

Full Text

Duke Authors

Cited Authors

  • Ledogar, JA; Smith, AL; Benazzi, S; Weber, GW; Spencer, MA; Carlson, KB; McNulty, KP; Dechow, PC; Grosse, IR; Ross, CF; Richmond, BG; Wright, BW; Wang, Q; Byron, C; Carlson, KJ; de Ruiter, DJ; Berger, LR; Tamvada, K; Pryor, LC; Berthaume, MA; Strait, DS

Published Date

  • February 8, 2016

Published In

Volume / Issue

  • 7 /

Start / End Page

  • 10596 -

PubMed ID

  • 26853550

Pubmed Central ID

  • PMC4748115

Electronic International Standard Serial Number (EISSN)

  • 2041-1723

International Standard Serial Number (ISSN)

  • 2041-1723

Digital Object Identifier (DOI)

  • 10.1038/ncomms10596


  • eng