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

Zhixin Sun; Aihua Yang; Fangchen Zhao; Andrey Yu. Zhuravlev; Bing Pan; Chunlin Hu; Qian Feng; Xi Chen; Maoyan Zhu

doi:10.1017/jpa.2023.23

How to translate text using browser tools

22 September 2023 New trilobite assemblage from the lower Cambrian (upper Stage 4) of the Lake Zone, western Mongolia

Zhixin Sun, Aihua Yang, Fangchen Zhao, Andrey Yu. Zhuravlev, Bing Pan, Chunlin Hu, Qian Feng, Xi Chen, Maoyan Zhu

Author Affiliations +

J. of Paleontology, 97(3):577-590 (2023). https://doi.org/10.1017/jpa.2023.23

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.

Citation Download Citation

Zhixin Sun, Aihua Yang, Fangchen Zhao, Andrey Yu. Zhuravlev, Bing Pan, Chunlin Hu, Qian Feng, Xi Chen, and Maoyan Zhu "New trilobite assemblage from the lower Cambrian (upper Stage 4) of the Lake Zone, western Mongolia," Journal of Paleontology 97(3), 577-590, (22 September 2023). https://doi.org/10.1017/jpa.2023.23

Accepted: 6 March 2023; Published: 22 September 2023

KEYWORDS/PHRASES

PUBLICATION TITLE:

COLLECTION:

PUBLICATION YEARS