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 1984 Some Devonian and Carboniferous ammonoids from Xizang.
Acta Palaeontologica Sinica, 23 (5): 597-604, fig.1-4, pl.1; Peking.
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
Shen 1975 [Discovery of primitive ammonoids from Nandan of Guangxi and its stratigraphical significance.] [In Chinese].
Professional Papers of Stratigraphy and Paleontology, 1: 86-104, figs., pl.1-2; Peking.
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).