新疆准噶尔盆地三个泉地区几种始新世哺乳类

本文记述了准噶尔盆地北缘三个泉地区依希白拉组中采到的踝节类、蹠行类、全齿类和恐角类化石。根据这些化石,依希白拉组的时代可能和北美中始新世勃力吉期相当。文内,通过文献分析,认为周明镇和胡长康(1956)记述的真恐角兽的前臼齿可能产自三个泉附近的依希白拉组。

SOME EOCENE MAMMALS FROM THE UQBULAK AREA OF THE JUNGGAR BASIN,XINJIANG

In the north part of the Junggar Basin,an escarpment in east-west extent is some 100 kmsouth of the River Ulungur.It is called (U|¨)qbulak area or Xiyilian(Lizad escarpment)bygeologists.Early in 1950's an upper premolar was collected from the Paleogene deposits of the area,and was referred to Eudinoceras sp.(Chow and Hu,1956).More mammal fossils havebeen collected from the (U|¨)qbulak Formation at Huashigou(Fossil gully),25 km NWW of(U|¨)qbulak in 1981 and 1982.Three bone beds of the (U|¨)qbulak Formation were respectively mar-ked with A,B,and C from bottom to top,among which the bone bed B contains more mam-mal fossils than other two.All material collected in the Summers of 1981 and 1982 is describedin this paper with the exception of perissodactyl specimens.