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The Triassic.

Michael J Benton1

  • 1School of Earth Sciences, University of Bristol, Bristol BS8 1RJ, UK.

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|December 7, 2016
PubMed
Summary
This summary is machine-generated.

The Triassic period (252–201 million years ago) was pivotal for modern ecosystems, marking the origin of major vertebrate groups like sharks, bony fishes, amphibians, and mammals.

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Area of Science:

  • Paleontology
  • Geological Time Scales
  • Vertebrate Evolution

Background:

  • The Triassic period (252–201 million years ago) is one of 11 geological periods within the Phanerozoic Eon.
  • This period is critical for understanding the evolutionary history of life on Earth.
  • Modern ecosystems have their roots in the evolutionary innovations of the Triassic.

Purpose of the Study:

  • To highlight the significance of the Triassic period in the origin of modern vertebrate groups.
  • To establish the Triassic as a crucial time frame in Earth's history.

Main Methods:

  • Analysis of geological time scales.
  • Review of paleontological evidence for vertebrate origins.

Main Results:

  • The Triassic period witnessed the origin of key modern vertebrate clades.
  • These include neoselachian sharks, neopterygian bony fishes, lissamphibians, turtles, lepidosaurs, crocodilomorphs, and mammals.
  • Theropod dinosaurs, the ancestors of modern birds, also emerged during the Triassic.

Conclusions:

  • The Triassic period was a transformative era, fundamental to the establishment of modern vertebrate biodiversity.
  • Understanding Triassic evolutionary events is essential for comprehending contemporary ecosystems.