西藏亚东堆纳地区始新世介形虫化石组合

he Zhepure Formation is the youngest marine sediments in Yadong, southern Xizang (Tibet). Sixty eight samples containing ostrocods were collected for this study from the upper sand-shale member of the Zhepure Formatiom in Ria section, Duina, Yadong county of southern Tibet. 35 species of 23 genus were indentified and three Ostracod assemblages are recognized (in ascending order): ①Cythereridea appendieulea-Cytherella obtusa assemblage,②Phlyctenophora zongpuensis-Aglaiocypris xizangensis assemblage, ③Loxoconcha sp.-Xestoleberis kangpaensis assemblage. The assemblages is dated as late Lutetian to early Priabonian of Eocene. It indicates that the sea water did not withdraw from the southern Tibet until early Priabonian. Three species have been described and illustrated in this paper.