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结合新采集的材料与前人研究,综合分析拉萨地块申扎永珠乡下拉组中类动物群的构成与时代,并将其与同期华南类动物群进行对比。分析结果表明,申扎下拉组的类动物群共16属(含1亚属,2存疑属),70种(含比较种与未定种),时代为茅口期,大致相当于Roadian阶上部至Wordian阶。与同期华夏区华南的类动物群相比,下拉组的类动物群在属种构成,尤其是优势类群方面差异显著,其主要特征为Neoschwagerinidae与Verbeekinidae两科的种级分异度很低,Chusenella与Nankinella占优势地位,且缺失了约60%华南的常见属。
Based on the newly collected materials and previous studies, the composition and age of the marmoset in the Lower Triassic of Xizha, Yongzhu, Lhasa Block are comprehensively analyzed and compared with that of the South China Tribal Fauna in the same period. The results show that there are 16 genera (including 1 subgenus, 2 suspicious species), 70 species (including comparative species and undetermined species) in the Xanza pull-down group and the Maokou period in the Xanza pull-down group, roughly equivalent to the upper part of the Roadian order To Wordian order. Compared with the fauna in South China during the same period, the fauna of the pull-down group had significant differences in genera, especially the dominant groups, and the main characteristics were the low species-grade differentiation of Neoschwagerinidae and Verbeekinidae , Chusenella and Nankinella predominate, and about 60% of common southern China are missing.