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Human evolution. Response to Comment on "Human-like hand use in Australopithecus africanus".

Matthew M Skinner1, Nicholas B Stephens2, Zewdi J Tsegai2

  • 1School of Anthropology and Conservation, University of Kent, Canterbury CT2 7NR, UK. Department of Anthropology, University College London London, WC1H 0BW, UK. Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103 Leipzig, Germany. Evolutionary Studies Institute and Centre for Excellence in PalaeoSciences, University of the Witwatersrand, Private Bag 3, Wits 2050, South Africa. m.skinner@kent.ac.uk t.l.kivell@kent.ac.uk.

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This study demonstrates actual hand use behaviors in Australopithecus africanus, challenging previous claims of simplified functional adaptation understanding. Our findings support real-world behaviors, not just potential ones, based on robust evidence.

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Area of Science:

  • Paleoanthropology
  • Primate functional morphology
  • Skeletal biomechanics

Background:

  • Debate exists regarding the functional interpretation of Australopithecus africanus hand morphology.
  • Previous studies have suggested potential, rather than actual, hand use behaviors.

Purpose of the Study:

  • To address claims of a simplified understanding of bone functional adaptation in paleoanthropology.
  • To present evidence for actual, human-like hand use in Australopithecus africanus.

Main Methods:

  • Analysis of functional interpretation based on methodological approach.
  • Comparative analysis using a diverse sample.
  • Integration of previous experimental data on bone adaptation.

Main Results:

  • The study's findings indicate actual behavioral patterns in Australopithecus africanus hand use.
  • The functional interpretation is strongly supported by the employed methodology and comparative data.
  • Evidence presented refutes claims of non-novelty and simplified understanding.

Conclusions:

  • The research provides robust evidence for specific hand use behaviors in Australopithecus africanus.
  • The functional interpretation of the skeletal evidence is well-supported and scientifically rigorous.
  • This study contributes to a more nuanced understanding of hominin functional adaptation.