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Diverse earliest Triassic ostracod fauna of the non-microbialite-bearing shallow marine carbonates of the Yangou section, South China

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)583-596
Number of pages14
Issue number4
Early online date11 May 2019
DateAccepted/In press - 8 Mar 2019
DateE-pub ahead of print - 11 May 2019
DatePublished (current) - 7 Sep 2019


Since diverse ostracod faunas in the immediate aftermath of the latest Permian mass extinction are mainly found within Permian–Triassic boundary microbialites (PTBMs), the idea of an ostracod ‘microbial-related refuge’ has been proposed. Here, we report a diversified earliest Triassic ostracod fauna from the Yangou section in South China, where no PTBMs were deposited, providing evidence inconsistent with this ‘microbial-related refuge’ hypothesis. In addition, a significant ostracod extinction is recorded, corresponding with the earliest Triassic mass extinction (ETME). This ETME of ostracods is associated with size increases and a length/height ratio (L/H) decrease, indicating varied evolutionary patterns of shape and size of ostracods through the Permian–Triassic (P-Tr) extinction events. Although the nature of these biotic changes is somewhat unclear, the temporally varied ‘refuge zone’ scenario provides us with a window to reconstruct the environmental dynamics of ecosystem changes during the P-Tr transition.

    Research areas

  • Body size, Hollinella, marine ecosystem, mass extinction, recovery, refuge zone



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