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Pairwise difference analysis in modern human origins research.

Mark Collard1, Nickolas Franchino

  • 1Department of Anthropology, University College London, Gower Street, London, WC1E 6BT, UK. m.collard@ucl.ac.uk

Journal of Human Evolution
|September 18, 2002
PubMed
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Pairwise difference analysis of primate fossils may not accurately reflect evolutionary relationships. This method

Area of Science:

  • Evolutionary biology
  • Paleontology
  • Phylogenetics

Background:

  • Pairwise difference analysis is a phenetic method used to group taxa based on observed differences.
  • This method has been applied to hominid fossils to infer phylogenetic relationships, influencing the debate on modern human origins.
  • Claims that this analysis disproves the African replacement model and supports the multiregional evolution model are contentious due to unproven reliability.

Purpose of the Study:

  • To assess the reliability of pairwise difference analysis in reconstructing phylogenetic relationships using morphological data.
  • To test the efficacy of pairwise difference analysis against a known molecular phylogeny in a well-defined primate group.

Main Methods:

  • Conducted pairwise difference analyses on craniodental and soft tissue data from extant hominoids.

Related Experiment Videos

  • Compared the resulting phylogenies with a well-established molecular phylogeny of the same hominoid group.

    • Main Results:

    • The phylogenies generated by pairwise difference analysis were inconsistent with the established molecular phylogeny of hominoids.
    • This demonstrates a significant discrepancy between the results of the phenetic method and molecular data.

    Conclusions:

    • Pairwise difference analysis is unreliable for generating accurate primate phylogenies from morphological data.
    • Published studies using pairwise difference analysis on hominid fossils may not provide valid insights into modern human origins.