Gastropod Fauna of the Zuodeng Permian-Triassic Boundary Section in the Nanpanjiang Basin and Its Geometric-Based Morphological Disparity Analysis  

作　　者：Xin Sun Li Tian Xincheng Qiu Kaiping Guan Erik Tihelka Haijun Song Jinnan Tong Hao Yang 

机构地区：[1]State Key Laboratory of Biogeology and Environmental Geology and School of Earth Science,China University of Geosciences,Wuhan,430074,China [2]No.262 Party of Zhejiang Bureau of Geology and Nuclear Industry,Huzhou,313000,China [3]School of Earth Science,University of Bristol,Bristol,BS81TQ,United Kingdom

出　　处：《Journal of Earth Science》2025年第1期89-101,共13页地球科学学刊(英文版)

基　　金：supported by the National Natural Science Foundation of China(Nos.41730320,42030513)。

摘　　要：Gastropods,as one of the most common invertebrates in shallow marine environments,were heavily impacted by the Permian–Triassic mass extinction(PTME),with severe loss of diversity and remarkable dwarfism of body size.Here,we report a new gastropod fauna from the Permian-Triassic carbonates of Zuodeng,Guangxi Province,South China.Five species belonging to five genera and two indeterminate taxa are identified.The Zuodeng fauna is dominated by Paleozoic holdover taxa,including Holopea teres,Protostylus sp.,and Wannerispira shangganensis although most of them are found in the basal Triassic microbialites.Three gastropod communities have been recognized by cluster analysis.Further morphological analyses show that the changing pattern of disparity,with diversity decreasing from communityⅡtoⅢ,fits the interior-reduction model.In addition,the morphospace of community in microbialites is higher than those in non-microbialite bearing beds at Zuodeng,shedding new light on the ecological role of microbialites during the Permian–Triassic environmental stress.

关 键 词：molluscs MORPHOSPACE MICROBIALITE mass extinction SURVIVAL 

分 类 号：Q915[天文地球—古生物学与地层学] P534[生物学—古生物学]