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SCIENCE CHINA Earth Sciences, Volume 64 , Issue 10 : 1784-1797(2021) https://doi.org/10.1007/s11430-020-9794-8

The Silurian-Devonian boundary in East Yunnan (South China) and the minimum constraint for the lungfish-tetrapod split

More info
  • ReceivedDec 24, 2020
  • AcceptedMay 20, 2021
  • PublishedJul 22, 2021

Abstract


Funded by

the Strategic Priority Research Program of the Chinese Academy of Sciences(CAS)

the National Natural Science Foundation of China(Grant,Nos.,42072026,41972006,&,41530102)

and the Key Research Program of Frontier Sciences of CAS(Grant,No.,QYZDJ-SSW-DQC002)


Acknowledgment

The authors are grateful to Zhaohui PAN, Jie ZHANG, Xindong CUI, Jiachen CAI and Jianhua WANG for field works, to You’an ZHU for the treatment and measurement of the geochemical samples, and to Brian CHOO for improving the manuscript. The authors would also like to thank two anonymous reviewers for their constructive comments and suggestions. This work was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (CAS) (Grant Nos. XDB26000000, XDA19050102), the National Natural Science Foundation of China (Grant Nos. 42072026, 41972006 & 41530102), and the Key Research Program of Frontier Sciences of CAS (Grant No. QYZDJ-SSW-DQC002).


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  • Figure 1

    Phylogeny and geological time ranges of the sarcopterygian lineages leading to modern coelacanths, lungfish and tetrapods, mainly after Yu et al. (2010), Lu et al. (2016) and Wang et al. (2020). Artwork credit: Brian Choo and Yong Xu. The numerical ages are based on the International Chronostratigraphic Chart v2020/03 (Cohen et al., 2013; updated). Eif., Eifelian; G., Gorstian; Giv., Givetian; Ho., Homerian; Loch., Lochkovian; Lu., Ludlow; Lud., Ludfordian; Pra., Pragian; Pri., Pridoli; Sh., Sheinwoodian; Wen., Wenlock.

  • Figure 2

    Late Silurian paleogeographic map of South China (a) and the geological structure outline near the Dahe Village in Yiliang County, East Yunnan (b). (a) is modified from Rong et al. (2003) and Huang et al. (2011); (b) is based on the open geological data in GeoCloud (http://geocloud.cgs.gov.cn).

  • Figure 3

    The variation curves of both the stable isotopic values and contents of TOC in the Dahe-1 Section.

  • Figure 4

    The variation curves of both the stable isotopic values and contents of TOC in the Dahe-2 Section.

  • Figure 5

    The biostratigraphy during the Silurian-Devonian interval and the representative schemes of the SDB in East Yunnan. The fossil taxa and biozontions of important fossil groups, including invertebrates, spores, plants, and microvertebrates, are after Fang et al. (1985), Wang (2000), Zhao et al. (2011), Ouyang et al. (2017), and Qie et al. (2019), respectively; previous SDB schemes and relevant references: A (Wu, 1977), B (Fang et al., 1985), C (Rong et al., 1990), D (Zhao and Zhu, 2010; Qie et al., 2019; Cai et al., 2020), and E (Tian et al., 2011; Rong et al., 2019).

  • Figure 6

    Chemostratigraphic correlation of the isotopic variation of organic carbon among three sections from Czech, Turkey, Morocco and three Chinese sections, including the Dahe Composite Section (in ‰–VPDB). See the legends in Figures 3 and 4.

  • Figure 7

    Phylogeny and temporal distribution of early jawed vertebrates in Silurian-Devonian interval. The cladogram is combined and simplified from Zhu et al. (2013, 2016), Giles et al. (2015), and Lu et al. (2016, 2017). Aer., Aeronian; Rhu., Rhuddanian; Tely., Telychian. For other abbreviations, see Figure 1.

  • Table 1   The representative schemes of the SDB in Qujing, East Yunnana)

    Fm.=Formation, Mb.=Member; for other abbreviations see Figure 1. The fish silhouette represents the earliest horizon of crown sarcopterygians.

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