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

Abstract:

: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.

journal_name

Nat Commun

journal_title

Nature communications

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

doi

10.1038/ncomms10596

subject

Has Abstract

pub_date

2016-02-08 00:00:00

pages

10596

issn

2041-1723

pii

ncomms10596

journal_volume

7

pub_type

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