	Authors	Year	Title
	Xu & Wei	1977	Fossil Atlas of South-Central China, part 2, Cephalopoda. [In Chinese.] Yichang Institute of Geology and Mineral Resources 1977: p.537-582, pl.204-218, (Geological Publishing House).
	Zhou	1985	Several problems in the Early Permian ammonoids from South China. Palaeontologia Cathayana, 2: 179-210, 20 figs., pl.1-5.