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Rise of clathrodictyid stromatoporoids during the Great Ordovician Biodiversification Event: insights from the Upper Ordovician Xiazhen Formation of South China

Published online by Cambridge University Press:  23 June 2022

Juwan Jeon Open the ORCID record for Juwan Jeon [Opens in a new window] ,
Kun Liang Open the ORCID record for Kun Liang [Opens in a new window] ,
Stephen Kershaw ,
Jino Park ,
Mirinae Lee  and
Yuandong Zhang
Juwan Jeon
Affiliation:
State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Palaeoenvironment, Chinese Academy of Sciences, Nanjing 210008, China University of Chinese Academy of Sciences (UCAS), Beijing 100049, China
Kun Liang*
Affiliation:
State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Palaeoenvironment, Chinese Academy of Sciences, Nanjing 210008, China
Stephen Kershaw
Affiliation:
Department of Life Sciences, Brunel University, Kingston Lane, Uxbridge, UB8 3PH, UK Earth Sciences Department, Natural History Museum, Cromwell Road, London, SW7 5BD, UK
Jino Park
Affiliation:
Department of Geology, Kangwon National University, Chuncheon, 24341, Republic of Korea
Mirinae Lee
Affiliation:
Division of Polar Earth-System Sciences, Korea Polar Research Institute, Incheon, 21990, Republic of Korea
Yuandong Zhang
Affiliation:
State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Palaeoenvironment, Chinese Academy of Sciences, Nanjing 210008, China University of Chinese Academy of Sciences (UCAS), Beijing 100049, China
*
*Corresponding author.
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Abstract

Clathrodictyids are the most abundant stromatoporoids in the Upper Ordovician Xiazhen Formation (middle to upper Katian) of South China. A total of nine species belonging to four clathrodictyid genera are identified in the formation, including Clathrodictyon idense Webby and Banks, 1976, Clathrodictyon cf. Cl. microundulatum Nestor, 1964, Clathrodictyon cf. Cl. mammillatum (Schmidt, 1858), Clathrodictyon megalamellatum Jeon n. sp., Clathrodictyon plicatum Webby and Banks, 1976, Ecclimadictyon nestori Webby, 1969, Ecclimadictyon undatum Webby and Banks, 1976, Camptodictyon amzassensis (Khalfina, 1960), and Labyrinthodictyon cascum (Webby and Morris, 1976). The clathrodictyid fauna in the Xiazhen Formation is very similar to those from both New South Wales and Tasmania, although the latter two Australian regions do not share any common clathrodictyid species during the Late Ordovician. The paleobiogeographic pattern indicates that the northward drift of South China resulted in a favorable environment for the migration of clathrodictyids from other peri-Gondwanan terranes to South China. In addition, these peri-Gondwanan clathrodictyid species hosted various endobionts, representing a variety of paleoecological interactions. The high abundance and species-level diversity of clathrodictyid species presumably increased the substrate availability of suitable host taxa, judging from the diverse intergrowth associations between clathrodictyids and other benthic organisms. These paleoecological interactions between stromatoporoid and other organisms are known from the Late Ordovician and became more abundant and widespread in the Siluro–Devonian. Overall, the Late Ordovician clathrodictyid assemblage in South China demonstrates one of the highest species-level diversities among all peri-Gondwanan terranes and represents a precursor of the complex, clathrodictyid-dominated communities of later metazoan reefs during the Great Ordovician Biodiversification Event.

UUID: http://zoobank.org/6063c47d-cb77-4a03-98cf-b2354656dea6

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Journal of Paleontology , Volume 96 , Issue 6 , November 2022 , pp. 1285 - 1317
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Copyright © The Author(s), 2022. Published by Cambridge University Press on behalf of The Paleontological Society

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Footnotes

This article has been updated since its original publication to add a missing figure number. See https://doi.org/10.1017/jpa.2022.69.

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