By the same authors

From the same journal

From the same journal

Distinct growth of the nasomaxillary complex in Au. sediba

Research output: Contribution to journalArticle

Published copy (DOI)

Author(s)

  • Rodrigo S. Lacruz
  • Timothy G. Bromage
  • Paul O'Higgins
  • Viviana Toro-Ibacache
  • Johanna Warshaw
  • Lee R. Berger

Department/unit(s)

Publication details

JournalScientific Reports
DatePublished - 15 Oct 2015
Volume5
Number of pages7
Pages (from-to)1-7
Original languageEnglish

Abstract

Studies of facial ontogeny in immature hominins have contributed significantly to understanding the evolution of human growth and development. The recently discovered hominin species Autralopithecus sediba is represented by a well-preserved and nearly complete facial skeleton of a juvenile (MH1) which shows a derived facial anatomy. We examined MH1 using high radiation synchrotron to interpret features of the oronasal complex pertinent to facial growth. We also analyzed bone surface microanatomy to identify and map fields of bone deposition and bone resorption, which affect the development of the facial skeleton. The oronasal anatomy (premaxilla-palate-vomer architecture) is similar to other Australopithecus species. However surface growth remodeling of the midface (nasomaxillary complex) differs markedly from Australopithecus, Paranthropus, early Homo and from KNM-WT 15000 (H. erectus/ergaster) showing a distinct distribution of vertically disposed alternating depository and resorptive fields in relation to anterior dental roots and the subnasal region. The ontogeny of the MH1 midface superficially resembles some H. sapiens in the distribution of remodeling fields. The facial growth of MH1 appears unique among early hominins representing an evolutionary modification in facial ontogeny at 1.9 my, or to changes in masticatory system loading associated with diet.

Discover related content

Find related publications, people, projects, datasets and more using interactive charts.

View graph of relations