Chitinozoans from the Telychian (Llandovery, Silurian) Shenxuanyi Member, upper Ningqiang Formation of the northwestern Yangtze Platform, China
Abstract Silurian strata are well-developed in the northwest margin of Yangtze Platform. A total of 117 densely spaced argillaceous samples were taken from the Shenxuanyi Member, upper Ningqiang Formation to the lowermost Chejiaba Formation of the Majia section in northern Sichuan Province. The main...
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SpringerOpen
2025-04-01
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| Series: | Swiss Journal of Palaeontology |
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| Online Access: | https://doi.org/10.1186/s13358-025-00364-7 |
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| author | Yangui Li Chunbo Yan Chuanshang Wang Jörg Maletz Yan Liang Huazhou Yao Haizhi Wu Weixiong Chen Jingqing Cheng Zichen Fang Xiaofeng Wang |
| author_facet | Yangui Li Chunbo Yan Chuanshang Wang Jörg Maletz Yan Liang Huazhou Yao Haizhi Wu Weixiong Chen Jingqing Cheng Zichen Fang Xiaofeng Wang |
| author_sort | Yangui Li |
| collection | DOAJ |
| description | Abstract Silurian strata are well-developed in the northwest margin of Yangtze Platform. A total of 117 densely spaced argillaceous samples were taken from the Shenxuanyi Member, upper Ningqiang Formation to the lowermost Chejiaba Formation of the Majia section in northern Sichuan Province. The main aim of this study is to obtain chitinozoans to test whether Wenlock deposits are preserved here. A highly diverse and abundant chitinozoan assemblage is documented, including 21 species from six genera. This assemblage was then compared to contemporaneous chitinozoan assemblages reported from adjacent areas. This study proposes that Eisenackitina venusta (corresponds to the Pterospathodus celloni conodont Biozone) is of chronostratigraphical significance for discussing the Telychian of the Yangtze region. It is suggested that the Silurian upper red bed (lower part of the Shenxuanyi Member) in the study area is younger than the Xiushan Formation and can be correlated with the Huixingshao Formation of the Central Yangtze Platform. There are no index chitinozoan species near the Llandovery–Wenlock boundary that have been found in the upper part of the Shenxuanyi Member, and the updated chronostratigraphic framework suggests that it is Telychian-aged deposits. |
| format | Article |
| id | doaj-art-02e92e34026644d585f16b652cec1bc3 |
| institution | OA Journals |
| issn | 1664-2376 1664-2384 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | SpringerOpen |
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| series | Swiss Journal of Palaeontology |
| spelling | doaj-art-02e92e34026644d585f16b652cec1bc32025-08-20T02:11:11ZengSpringerOpenSwiss Journal of Palaeontology1664-23761664-23842025-04-01144113310.1186/s13358-025-00364-7Chitinozoans from the Telychian (Llandovery, Silurian) Shenxuanyi Member, upper Ningqiang Formation of the northwestern Yangtze Platform, ChinaYangui Li0Chunbo Yan1Chuanshang Wang2Jörg Maletz3Yan Liang4Huazhou Yao5Haizhi Wu6Weixiong Chen7Jingqing Cheng8Zichen Fang9Xiaofeng Wang10College of Mining Engineering, Guizhou University of Engineering ScienceHubei Key Laboratory of Paleontology and Environmental Change, Wuhan Center of China Geological SurveyHubei Key Laboratory of Paleontology and Environmental Change, Wuhan Center of China Geological SurveyDepartment of Geosciences, FU BerlinState Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of SciencesHubei Key Laboratory of Paleontology and Environmental Change, Wuhan Center of China Geological SurveyCollege of Mining Engineering, Guizhou University of Engineering ScienceFoshan Geological Bureau of Guangdong Province, Guangdong GeologyHubei Center of Geological Disaster Control, Hubei Geological BureauHubei Key Laboratory of Paleontology and Environmental Change, Wuhan Center of China Geological SurveyHubei Key Laboratory of Paleontology and Environmental Change, Wuhan Center of China Geological SurveyAbstract Silurian strata are well-developed in the northwest margin of Yangtze Platform. A total of 117 densely spaced argillaceous samples were taken from the Shenxuanyi Member, upper Ningqiang Formation to the lowermost Chejiaba Formation of the Majia section in northern Sichuan Province. The main aim of this study is to obtain chitinozoans to test whether Wenlock deposits are preserved here. A highly diverse and abundant chitinozoan assemblage is documented, including 21 species from six genera. This assemblage was then compared to contemporaneous chitinozoan assemblages reported from adjacent areas. This study proposes that Eisenackitina venusta (corresponds to the Pterospathodus celloni conodont Biozone) is of chronostratigraphical significance for discussing the Telychian of the Yangtze region. It is suggested that the Silurian upper red bed (lower part of the Shenxuanyi Member) in the study area is younger than the Xiushan Formation and can be correlated with the Huixingshao Formation of the Central Yangtze Platform. There are no index chitinozoan species near the Llandovery–Wenlock boundary that have been found in the upper part of the Shenxuanyi Member, and the updated chronostratigraphic framework suggests that it is Telychian-aged deposits.https://doi.org/10.1186/s13358-025-00364-7Guangyuan CityNorthern Sichuan ProvinceBiostratigraphyLlandovery/Wenlock boundarySilurian upper red bed |
| spellingShingle | Yangui Li Chunbo Yan Chuanshang Wang Jörg Maletz Yan Liang Huazhou Yao Haizhi Wu Weixiong Chen Jingqing Cheng Zichen Fang Xiaofeng Wang Chitinozoans from the Telychian (Llandovery, Silurian) Shenxuanyi Member, upper Ningqiang Formation of the northwestern Yangtze Platform, China Swiss Journal of Palaeontology Guangyuan City Northern Sichuan Province Biostratigraphy Llandovery/Wenlock boundary Silurian upper red bed |
| title | Chitinozoans from the Telychian (Llandovery, Silurian) Shenxuanyi Member, upper Ningqiang Formation of the northwestern Yangtze Platform, China |
| title_full | Chitinozoans from the Telychian (Llandovery, Silurian) Shenxuanyi Member, upper Ningqiang Formation of the northwestern Yangtze Platform, China |
| title_fullStr | Chitinozoans from the Telychian (Llandovery, Silurian) Shenxuanyi Member, upper Ningqiang Formation of the northwestern Yangtze Platform, China |
| title_full_unstemmed | Chitinozoans from the Telychian (Llandovery, Silurian) Shenxuanyi Member, upper Ningqiang Formation of the northwestern Yangtze Platform, China |
| title_short | Chitinozoans from the Telychian (Llandovery, Silurian) Shenxuanyi Member, upper Ningqiang Formation of the northwestern Yangtze Platform, China |
| title_sort | chitinozoans from the telychian llandovery silurian shenxuanyi member upper ningqiang formation of the northwestern yangtze platform china |
| topic | Guangyuan City Northern Sichuan Province Biostratigraphy Llandovery/Wenlock boundary Silurian upper red bed |
| url | https://doi.org/10.1186/s13358-025-00364-7 |
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