basis of recordNiko, S.; Nishida, T.; Kyuma, Y. (1997). Moscovian (Carboniferous) orthoconic cephalopods from Guizhou and Guangxi, south China. <em>Paleontological research.</em> 1 (20): 100-109., available online athttps://www.biodiversitylibrary.org/page/40355070[details]