quoted in Lu & Chang, 1974, in Zhongguo Kexue Yuan, Nanking Dizhi Gushengwu Yanjiusuo [Acad. Sinica, Nanking Inst. Geol. Paleont. (Ed. )], Xinan diqu di gushengwu tuce. [A handbook of the stratigraphy and palaeontology in southwest China cience Press, Pek
