Yang Zhongjian
Famous Chinese paleontologist Yang Zhongjian (in older references his name is given as C. C. Young) named this genus from IVP AS V232-234, a group of four isolated partial teeth found near Weiyuan, Guangyuan, Sichuan Basin. He described them as "long, slender, moderately curved and compressed; ridged anterior and posterior sides with no trace of serrations; enamel very thin". He considered the genus to be "coelurosaurian", which at that time meant a small theropod. The most distinctive characteristic of these teeth was their lack of serrations.