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A new Griesbachian–Dienerian (Induan, Early Triassic) ammonoid fauna from Gujiao, South China

Published online by Cambridge University Press:  30 August 2018

Xu Dai ,
Haijun Song Open the ORCID record for Haijun Song [Opens in a new window] ,
Arnaud Brayard  and
David Ware
Xu Dai
Affiliation:
State Key Laboratory of Biogeology and Environmental Geology, School of Earth Sciences, China University of Geosciences, Wuhan 430074, China 〈[email protected]〉, 〈[email protected]〉
Haijun Song
Affiliation:
State Key Laboratory of Biogeology and Environmental Geology, School of Earth Sciences, China University of Geosciences, Wuhan 430074, China 〈[email protected]〉, 〈[email protected]〉
Arnaud Brayard
Affiliation:
Biogéosciences, UMR 6282, CNRS, Université Bourgogne Franche-Comté, 6 Boulevard Gabriel, 21000 Dijon, France 〈[email protected]〉
David Ware
Affiliation:
Museum für Naturkunde, Leibniz Institute for Evolution and Biodiversity Science, Invalidenstrasse 43, 10115 Berlin, Germany 〈[email protected]〉
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Abstract

Bed-by-bed sampling of the lower portion of the Daye Formation at Gujiao, Guizhou Province, South China, yielded new Griesbachian–Dienerian (Induan, Early Triassic) ammonoid faunas showing a new regional Induan ammonoid succession. This biostratigraphic scheme includes in chronological order the late Griesbachian Ophiceras medium and Jieshaniceras guizhouense beds, and the middle Dienerian Ambites radiatus bed. The latter is recognized for the first time as a separate biozone in South China. Eight genera and 13 species are identified, including one new species, Mullericeras gujiaoense n. sp. The new data show that a relatively high level of ammonoid taxonomic richness occurred rather rapidly after the Permian/Triassic mass extinction in the late Griesbachian, echoing similar observations in other basins, such as in the Northern Indian Margin.

UUID: http://zoobank.org/a24a3387-f3dd-4da4-a134-84372352a63d

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Articles
Information
Journal of Paleontology , Volume 93 , Issue 1 , January 2019 , pp. 48 - 71
Copyright
Copyright © 2018, The Paleontological Society 

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