Permian and Triassic Radiolarian Biostratigraphy in South and Southwest China

The study of Permian radiolarias in South and Southwest China has been advanced in recent years . A well-preserved radiolarian fauna of Triassic is recently found in Southwest China . Eight radiolarian assemblage zones are recognized as follows in ascending order: Pseudoalbaillella rhombothoracata assemblage zone (Qixian ), Pseudoalbaillella fusiformis assemblage zone (early-middle Maokouan ), Follicucullus assemblage zone (late Maokouan-Wujiapingian ), Cangyuanella assemblage zone (early-middle Changxingian ), Clavata assemblage zone (latest Permian), Triassocampe yini assemblage zone (early Early Triassic ), Pseudoeucyrtis liui assemblage zone (late Early Triassic )and Triassocampe dew even assemblage zone (Middle Triassic ). The Permo -Triassic boundary in chert mono -facial sequence of the Muyinhe Formation is discussed .

滇西南二叠纪放射虫化石

系统地描述了采自滇西南二叠纪拉巴群上部、老厂组、澜沧江带火山岩的放射虫化石,共计17属32种。该动物群可划分为3个组合带:Follicucullus组合、Neoalbaillella optima组合和Neoalbaillella ornithoformis组合,据这些放射虫组合讨论了相应地层单元的时代归属。

滇西南晚二叠世和早、中三叠世放射虫研究

系统描述了滇西南澜沧牡音河组晚二叠世最晚期和早、中三叠世放射虫化石,共计19属34种,并将其命名为牡音河动物群。该动物群明显地划分为4个组合,自下而上分别为Wangia组合(晚二叠世最晚期)、Shengia yini组合(早三叠世早期)、Pseudoeucyrits liui组合(早三叠世晚期)和Triassocampe deweveri组合(中三叠世早期)。