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New trilobite assemblage from the lower Cambrian (upper Stage 4) of the Lake Zone, western Mongolia

Published online by Cambridge University Press:  07 June 2023

Zhixin Sun ,
Aihua Yang Open the ORCID record for Aihua Yang [Opens in a new window] ,
Fangchen Zhao Open the ORCID record for Fangchen Zhao [Opens in a new window] ,
Andrey Yu. Zhuravlev ,
Bing Pan ,
Chunlin Hu ,
Qian Feng ,
Xi Chen  and
Maoyan Zhu
Zhixin Sun
Affiliation:
State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Centre for Excellence in Life and Palaeoenvironment, Chinese Academy of Sciences, Nanjing 210008, China , , , , College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
Aihua Yang*
Affiliation:
State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China , <15190503760@163.com>, The Frontiers Science Center for Critical Earth Material Cycling, Nanjing University, Nanjing 210023, China
Fangchen Zhao*
Affiliation:
State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Centre for Excellence in Life and Palaeoenvironment, Chinese Academy of Sciences, Nanjing 210008, China , , , , College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
Andrey Yu. Zhuravlev
Affiliation:
Department of Biological Evolution, Faculty of Biology, Lomonosov Moscow State University Leninskie Gory 1(12), Moscow 119234, Russia
Bing Pan
Affiliation:
State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Centre for Excellence in Life and Palaeoenvironment, Chinese Academy of Sciences, Nanjing 210008, China , , , ,
Chunlin Hu
Affiliation:
State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Centre for Excellence in Life and Palaeoenvironment, Chinese Academy of Sciences, Nanjing 210008, China , , , ,
Qian Feng
Affiliation:
State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China , <15190503760@163.com>,
Xi Chen
Affiliation:
State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China , <15190503760@163.com>,
Maoyan Zhu
Affiliation:
State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Centre for Excellence in Life and Palaeoenvironment, Chinese Academy of Sciences, Nanjing 210008, China , , , , College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
*
*Corresponding authors.
*Corresponding authors.
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Abstract

The western Mongolian Lake Zone was a Neoproterozoic to early Paleozoic volcanic arc where tuffs, lavas, fossiliferous siliciclastics, and carbonates accumulated during the early Cambrian. An uppermost Cambrian Series 2 (upper Stage 4) trilobite assemblage is described here from the Burgasutay Formation representing a continuous lower Cambrian succession at the Seer Ridge of the Great Lake Depression. The new assemblage is dominated by dorypygids and consists of 13 trilobite genera belonging to nine families including Catinouyia heyunensis new species. These fossils comprise the youngest and richest lower Cambrian trilobite assemblage in Mongolia. The composition of the Lake Zone fauna suggests its biogeographic affinity with the Siberian Platform and Altay-Sayan Foldbelt, but the presence of inouyiids also implies a connection of this region with East Gondwana.

UUID: http://zoobank.org/fb0ebe23-144f-46ed-9543-7df9eea85fbc

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Journal of Paleontology , Volume 97 , Issue 3 , May 2023 , pp. 577 - 590
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Copyright © The Author(s), 2023. Published by Cambridge University Press on behalf of The Paleontological Society

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