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Article: Silurian (late Llandovery – Wenlock) conodont fauna and biostratigraphy from the Yanbian area of Sichuan Province, south-west China

Papers in Palaeontology - Volume 7 Issue 1 - Cover
Publication: Palaeontology
Volume: 7
Part: 4
Publication Date: November 2021
Page(s): 1793 1824
Author(s): Guanzhou Yan, and Rongchang Wu
DOI: 10.1002/spp2.1364
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How to Cite

YAN, G., WU, R. 2021. . Papers in Palaeontology, 7, 4, 1793-1824. DOI: /doi/10.1002/spp2.1364

Author Information

  • Guanzhou Yan - State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology & Palaeontology Chinese Academy of Sciences Nanjing 210008 China
  • Guanzhou Yan - College of Earth & Planetary Sciences University of Chinese Academy of Sciences Beijing 100049 China
  • Rongchang Wu - State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology & Palaeontology Chinese Academy of Sciences Nanjing 210008 China
  • Rongchang Wu - Center for Excellence in Life & Palaeoenvironment Chinese Academy of Sciences Nanjing 210008 China

Publication History

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    Abstract

    Late Llandovery and Wenlock conodonts are still inadequately documented in China, with data collected chiefly from the Baizitian section in Yanbian County, Sichuan Province, south-west China. A collection of over 32 000 conodont elements was recovered from 38 samples from the Xiabaizitian and Shangbaizitian formations at this classic locality. The conodont fauna is dominated by cosmopolitan species and can be assigned to 50 species representing 17 genera. Of these, one new species, Apsidognathus yanbianensis sp. nov., is proposed herein. Six conodont zones are recognized in this section, including the Pterospathodus eopennatus Zone, the Pt. amorphognathoides angulatus Taxon-range Zone of the Pt. a. amorphognathoides Superzone, the Kockelella ranuliformis Zone, the Kockelella walliseri Taxon-range Zone, and the Kockelella patula Taxon-range Zone, in ascending order. These zones can be correlated with other conodont zones around the world based on the occurrences of the stratigraphically diagnostic species. Moreover, the stratigraphical ranges of Pterospathodus enable greater understanding of the correlation of the Telychian guide taxa. The conodont biodiversity changes and faunal turnover across the Silurian Ireviken Bioevent are here documented for the first time in the Baizitian section from the South China palaeoplate.

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