A MAMMALIAN LOWER JAW FROM THE JURASSIC OF LINGYUAN, LIAONING

In 1976, a right mandible of a Mesozoic mammal was collected by Messrs. Cheng Zhengwu and Yue Zhao of Institute of Geology, the Chinese Academy of Geological Sciences, from the Middle Jurassic in Lingyuan County, Liaoning Province, Northeast China (fig. 1), When they were studying the Mesozoic stratigraphy of that area. This fossil site is most probably from the same locality as that of Yabeinosaurus tenuis reported by C.C. Young in 1958. Both fossils are derived from the same horizon.