1 Introduction The dinosaur fossil reported in this paper was discovered in 1983 by Cheng Zhenwu and Pang Qiqing on the northeast slope of Kangdailiang mountain, Zhaojiagou, Tianzhen county,Shanxi Province, China (Fig.1). They are 12 joined caudal vertebrae yielded from the purplish red mudstone of the Huiquanpu Formation which has been considered to be of Eocene in ages. By five times of the excavating work from 1989 to 1994, more than 2300 pieces of dinosaur fossils had been collected. 2 Synopsis of Stratigraphy The Huiquanpu Formation yielded tile dinosaur fossils mainly distributed in the southern Tianzhen county, Shanxi Province and the northern Yangyuan county,Hebei Province,China. It lays under the basalt of Miocene Hanruoba Formation unconformably and on the upper Archaeozoic Jining Group as well as Changcheng Series Gaoy. uzhoung Formation of Middle Protcrozoic by unconformity (Fig. 2).
