Mixed continental-marine biotas following the Permian-Triassic mass extinction in South and North China
Mixed continental-marine biotas following the Permian-Triassic mass extinction in South and North China
复制标题
中国南方和北方二叠纪-三叠纪大规模灭绝后的大陆-海洋混合生物群
DOI：
10.1016/j.palaeo.2017.10.028
复制
发表时间：
2019-04-01
影响因子：
3
通讯作者：
Huang, Yunfei
中科院分区：
文献类型：
--
作者：
Chu, Daoliang;Tong, Jinnan;Huang, Yunfei
海洋和大陆二叠纪-三叠纪（P-Tr）地层之间的关联对于充分了解这一全球灭绝事件的性质至关重要，但事实证明这是很难实现的。在这里，我们发现华南和华北的两个剖面在灭绝后地层区间记录了类似的混合陆海生物群，包括壳甲类、植物、昆虫、海洋双壳类和舌腕足类动物。此外，大陆P-Tr大灭绝表现为华南巨齿蕨植物区系多样性和丰度急剧下降，但华北地区古生代型针叶植物区系和草食性沙地龙类消失。这些混合的陆海生物群为华南和华北地区海陆P-Tr过渡层的地层对比提供了生物学证据，特别是Pteria-Towapteria-Eumorphotis双壳类组合与Euestheria gutta-bearing conchostracan动物群或Euestheria gutta-Magniestheria mangaliensis-Palaeolirnnadiopsis vilujensis的共生。壳甲纲组合。我们建议这些特定的海洋双壳类和大陆壳甲类组合可以被视为海洋-大陆硅质碎屑环境中 P-Tr 过渡层的标志。
Correlation between marine and continental Permian-Triassic (P-Tr) strata is crucial for full understanding of the nature of this global extinction event, but it has proved difficult to achieve. Here, we show that two sections in South China and North China record similar mixed continental-marine biota in the post-extinction stratigraphic interval, including conchostracans, plants, insects, marine bivalves and lingulid brachiopods. In addition, the continental P-Tr mass extinction was represented by a sharp decrease in the diversity and abundance of the Gigantopteris flora in South China, but eliminated the Palaeozoic-type conifer flora and herbivorous pareiasaurs in North China. These mixed continental-marine biota provide the biological evidence for stratigraphic correlation between marine and continental P-Tr transitional beds in South China and North China, especially the co-occurrence of the Pteria-Towapteria-Eumorphotis bivalve assemblage and the Euestheria gutta-bearing conchostracan fauna or Euestheria gutta-Magniestheria mangaliensis-Palaeolirnnadiopsis vilujensis conchostracan assemblage. We propose that these specific marine bivalve and continental conchostracan assemblages could be considered as markers of P-Tr transitional beds in marine-continental siliciclastic settings.