Authors Year Title
Gao, Ruan & Chen 1983 Cephalopoda.[In Chinese]. [Gao,Y., Ruan,Y., Chen,J. & Wen,Yuling].
Paleontological Atlas of Northwestern China. Shaanxi, Gansu and Ningxia Volume. Part II. Upper Paeozoic: 452-475, fig.136-165, pl.151-155; Beijing.
Sheng 1987 Carboniferous ammonoids from the Jingyuan district, Gansu.
Bull. Inst. Geol., Chinese Acad. Geol. Sci., 16: 143-193, fig.1-29, pl.1-5; Beijing.