Echinoderms,Meitan Formation,Ordovician,paleogeograph,Guiyang


,"/> <span>Diversity and Paleogeographic Distribution of Hemicosmitoid and Glyptocystitoid in  Ordovician Meitan Formation of Guiyang</span>

Journal of Jilin University(Earth Science Edition) ›› 2023, Vol. 53 ›› Issue (5): 1380-1390.doi: 10.13278/j.cnki.jjuese.20220017

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Diversity and Paleogeographic Distribution of Hemicosmitoid and Glyptocystitoid in  Ordovician Meitan Formation of Guiyang

Li Jiale, Lan Tian, Wang Yue   

  1. College of Resource and Environmental Engineering, Guizhou University, Guiyang 550025, China




  • Online:2023-09-26 Published:2023-10-17
  • Supported by:
    Supported by the National Natural Science Foundation of China （41902003）

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Abstract:

Echinoderms is one of the most primitive animal groups, and its evolutionary history is crucial for understanding the origin and early evolution of multicellular animals. In this paper, some echinoderm fossils, collected from the Meitan Formation in Wudang area of Guiyang, are identified as thecal plates of the Glyptocystitoida and Hemicosmitoida in the Rhombifera, belonging to Polycosmites and Macrocystella. We also conduct a study of the Ordovician paleogeographic distribution of the two superfamilies, and find that the presence of Polycosmites and Macrocystella in the Meitan Formation expands the biogeographic distribution of the two genera in Yangtze plate. At the same time, this discovery reveals the diversity of echinoderms in Wudang area, and provides new information on the evolutionary radiation of echinoderms during the Early Ordovician.


Key words: Echinoderms')">

Echinoderms, Meitan Formation, Ordovician, paleogeograph,
')">Guiyang


CLC Number: 

  • P52
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