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Updated: Mar 1, 2026

Using Generative Art to Convey Past and Future Climate Transitions
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Global biogeography since Pangaea.

Sarah R N McIntyre1, Charles H Lineweaver2,3, Colin P Groves4

  • 1Research School of Astronomy and Astrophysics, Australian National University, Canberra, Australia sarah.mcintyre@anu.edu.au.

Proceedings. Biological Sciences
|June 9, 2017
PubMed
Summary
This summary is machine-generated.

Continental break-up drove species divergence. Molecular clock dates align with paleomagnetic continental separation dates for 42 vertebrate pairs, supporting vicariance-driven speciation.

Keywords:
Pangaeabiogeographycontinental driftpalaeomagneticphylogeneticvicariant speciation

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Area of Science:

  • Evolutionary Biology
  • Geology
  • Molecular Phylogenetics

Background:

  • The breakup of the supercontinent Pangaea approximately 180 million years ago (Ma) influenced global species distribution, leading to vicariance-driven speciation.
  • Understanding the timing of speciation events is crucial for reconstructing evolutionary history and biogeographic patterns.

Purpose of the Study:

  • To test whether molecular clock divergence dates for species separated by continental drift align with paleomagnetic dates of continental separation.
  • To investigate the role of vicariance in vertebrate speciation.

Main Methods:

  • Analysis of phylogenetic divergence dates from 42 pairs of vertebrate taxa with limited dispersal abilities.
  • Comparison of molecular clock estimates with paleomagnetic dating of continental landmass separations.

Main Results:

  • Phylogenetic divergence dates for continent-bound terrestrial and freshwater vertebrates are consistent with paleomagnetic dates of continental separation.
  • The findings support the hypothesis that continental fragmentation is a primary driver of speciation in these groups.

Conclusions:

  • The breakup of Pangaea and subsequent continental drift provide a reliable timescale for the divergence of many vertebrate species.
  • Vicariance resulting from tectonic events is a significant factor in shaping terrestrial and freshwater vertebrate biodiversity.