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Related Experiment Videos

The anthropoid postcranial axial skeleton: comments on development, variation, and evolution.

David Pilbeam1

  • 1Program in Biological Anthropology, Peabody Museum, Harvard University, Cambridge, Massachusetts 02138, USA. pilbeam@fas.harvard.edu

Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution
|June 24, 2004
PubMed
Summary

This study examines intraspecific variation in primate axial skeletons, focusing on hominoids. Understanding developmental genetics of skeletal variation is key to evolutionary developmental biology (Evo-Devo).

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Area of Science:

  • Evolutionary developmental biology (Evo-Devo)
  • Comparative anatomy
  • Paleontology

Background:

  • Intraspecific phenotypic variation is crucial for natural selection and evolutionary change.
  • The axial skeleton offers a valuable model for studying developmental genetics and evolutionary changes.
  • Previous research documents interspecific differences in skeletal development across primates.

Purpose of the Study:

  • To analyze intraspecific variation in the axial postcranial skeleton of primates, with a focus on hominoids.
  • To explore evolutionary changes in the primate axial skeleton, particularly in relation to bipedalism in humans.
  • To propose hypotheses for these changes based on developmental genetics.

Main Methods:

  • Analysis of intraspecific variation in the axial postcranial skeleton of primate species.

Related Experiment Videos

  • Utilizing large sample sizes of hominoid species for vertebral counts and somite number data.
  • Reviewing evolutionary changes in primate axial skeletons and proposing developmental genetics-based hypotheses.

    • Main Results:

    • Data on intraspecific variation in the axial postcranial skeleton of selected primates, including hominoids, are presented.
    • Vertebral counts and original somite numbers are analyzed in large hominoid samples.
    • Evolutionary changes in primate axial skeletons are reviewed, with hypotheses linking them to developmental genetics.

    Conclusions:

    • The axial skeleton provides a valuable system for understanding Evo-Devo principles within primates.
    • Developmental genetics likely plays a significant role in evolutionary changes observed in the primate axial skeleton.
    • Further experiments on model organisms are recommended to test hypotheses regarding primate skeletal evolution.