	Authors	Year	Title
	Ruan	1981a	Devonian and earliest Carboniferous Ammonoids from Guangxi and Guizhou. Mem. Nanjing Inst. Geol. Paleont. Academia Sinica, 15: 1-152, fig.1-102, pl.1-33; Beijing.
	Ruan	1996	Zonation and distribution of the early Devonian primitive ammonoids in South China. In: Wang Hongzhen & Wang Xunlian: Centennial Memorial Volume Sun Yunzhu: Paleontology and Stratigraphy, 104-112, pl.14.1-2, text-fig.14.1-2, tabl.14.1