Biostratigraphy of Triassic Ammonoids

  • James F. JenksEmail author
  • Claude Monnet
  • Marco Balini
  • Arnaud Brayard
  • Maximiliano Meier
Part of the Topics in Geobiology book series (TGBI, volume 44)


The Triassic is a turning point in the evolutionary history of ammonoids, characterized by the flourishing Ceratitida and the appearance of the first heteromorphs. Following the end-Permian mass extinction, ammonoids were among the first groups to rediversify by producing many new taxa. Already in the late nineteenth century, the still currently recognized Triassic stages and substages were introduced. The historical development of Triassic ammonoid biostratigraphy is a good example of worldwide cooperation between many geographically-diverse research groups, which initially began in Germany and the European Alps. This cooperation was then extended to North America, Transcaucasia, North Indian Margin, South China, and Russia. A renewed interest in Triassic ammonoid biozonation has occurred during the last few decades, leading to the recognition of tens of ammonoid zones spanning about 50.9 Myr (leading to an average duration for ammonoid biochronozones of about 0.74 Myr), whose correlation and definition are herein synthesized.


Ammonoids Triassic Biochronology Biostratigraphy Correlation 



We thank Hans Hagdorn and Dieter Korn for their constructive comments and suggestions. This work is a contribution to the ANR project AFTER (ANR-13-JS06–0001; AB) and was also funded by the CNRS INSU Interrvie (AB).


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Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  • James F. Jenks
    • 1
    Email author
  • Claude Monnet
    • 2
  • Marco Balini
    • 3
  • Arnaud Brayard
    • 4
  • Maximiliano Meier
    • 5
  1. 1.West JordanUSA
  2. 2.UMR CNRS 8217 Géosystèmes, UFR des Sciences de la Terre (SN5)Université de Lille 1Villeneuve d’Ascq cedexFrance
  3. 3.Dipartimento di Scienze della Terra “A. Desio”MilanoItaly
  4. 4.UMR CNRS 6282 Biogéosciences, Université de BourgogneDijonFrance
  5. 5.Paläontologisches Institut und MuseumUniversität ZürichZürichSwitzerland

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