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198 8年夏 ,中国加拿大恐龙考察队在内蒙古鄂尔多斯盆地下白垩统含著名的鹦鹉嘴龙 (Ｐｓｉｔｔａｃｏｓａｕｒｕｓ)化石的砖红色砂岩中发现一具倦缩伏卧骨骼关节相连的小型恐龙化石。经加拿大自然博物馆ＤａｌｅＡ .Ｒｕｓｓｅｌｌ和中国科学院董枝明研究鉴定为兽足类恐龙中的
1988. In the summer of 8-8, a Chinese dinosaur expedition from Canada identified a small dinosaur fossil linked to the weakened skeleton joint in the brick-red sandstone of the Lower Cretaceous Psittacosaurus fossil in the Ordos Basin, Inner Mongolia. Dale A. Russell, Canadian Museum of Natural History and Dong Zhiming, Chinese Academy of Sciences