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Related Experiment Videos

Middle Eocene primate tarsals from China: implications for haplorhine evolution.

D L Gebo1, M Dagosto, K C Beard

  • 1Department of Anthropology, Northern Illinois University, DeKalb, Illinois 60115, USA. dgebo@niu.edu

American Journal of Physical Anthropology
|October 9, 2001
PubMed
Summary

Fossil primate tarsals from China reveal four haplorhine taxa and two adapid species. These Middle Eocene finds provide crucial postcranial evidence bridging the gap between early primates and modern anthropoids.

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Area of Science:

  • Paleontology
  • Primate Evolution
  • Paleogene Mammals

Background:

  • The Middle Eocene epoch (approximately 45 million years ago) is a critical period for understanding early primate evolution.
  • Fossil discoveries in the Shanghuang fissures of China offer insights into primate diversity during this time.
  • Understanding the transition from early primates to anthropoids is key to reconstructing primate phylogeny.

Purpose of the Study:

  • To describe and analyze primate tarsal remains from the Shanghuang fissures.
  • To identify the taxa present and their phylogenetic relationships.
  • To investigate the evolutionary significance of these early primate fossils.

Main Methods:

  • Analysis of fossil primate tarsal bones recovered from Middle Eocene deposits.

Related Experiment Videos

  • Comparative morphological analysis with extant and extinct primate taxa.
  • Phylogenetic placement based on tarsal bone morphology.

    • Main Results:

    • Discovery of four higher-level haplorhine taxa and at least two adapid species.
    • Haplorhine primates include Tarsiidae, an Omomyidae-like group, Eosimiidae, and protoanthropoids.
    • Anthropoid tarsals show transitional morphology between omomyids and extant telanthropoids, providing postcranial evidence for the prosimian-anthropoid gap.
    • The fauna includes the smallest known euprimates, with most haplorhines weighing between 50-100g.

    Conclusions:

    • The Shanghuang primate fauna represents a unique and diverse assemblage of early haplorhines and adapids.
    • These fossils provide the first postcranial evidence supporting a transitional stage between prosimian and anthropoid primates.
    • The abundance of extremely small primates in this fauna highlights a unique ecological niche not seen in modern primate communities.