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Related Experiment Videos

New World monkey phylogeny based on X-linked G6PD DNA sequences.

Michael E Steiper1, Maryellen Ruvolo

  • 1Department of Anthropology, Harvard University, 11 Divinity Avenue, Cambridge, MA 02138, USA. steiper@fas.harvard.edu

Molecular Phylogenetics and Evolution
|April 8, 2003
PubMed
Summary

New World monkeys, or Platyrrhini, show complex evolutionary relationships. DNA analysis suggests Pitheciidae diverged first, with Atelidae and Cebidae as sister groups, though some methods conflict.

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Area of Science:

  • Primatology
  • Molecular Phylogenetics
  • Evolutionary Biology

Background:

  • Platyrrhini (New World monkeys) comprise 16 genera, consistently grouped into Pitheciidae, Atelidae, and Cebidae.
  • Existing molecular phylogenetic analyses lack consensus on higher-level relationships within Platyrrhini and the Cebidae family.

Purpose of the Study:

  • To investigate the phylogenetic relationships among New World monkey genera using DNA sequence data.
  • To resolve ambiguities in the evolutionary history of Platyrrhini, particularly family-level and within-family relationships.

Main Methods:

  • Collected and analyzed approximately 0.8 kb of new intronic DNA sequence data from the X-linked glucose-6-phosphate dehydrogenase (G6PD) locus.
  • Combined new data with 1.3 kb of existing G6PD intronic DNA sequence data.

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  • Employed distance, parsimony, and Bayesian phylogenetic inference methods.

    • Main Results:

    • G6PD sequence data support an initial split separating Pitheciidae from other platyrrhines.
    • Phylogenetic analyses suggest Atelidae and Cebidae are sister taxa, though Bayesian methods produced a conflicting tree with Atelidae as the outgroup.
    • Parsimony analysis favors a sister relationship between Aotus and the Cebus/Saimiri clade within Cebidae, but this was not consistently supported.

    Conclusions:

    • G6PD intronic DNA sequence data offer insights into Platyrrhini phylogeny but do not fully resolve all relationships.
    • Discrepancies between phylogenetic methods highlight challenges in reconstructing New World monkey evolutionary history.
    • Further research is needed to clarify the complex evolutionary pathways within Platyrrhini.