	Authors	Year	Title
	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