Wu, X. H.; Liao, S. Z. (2001). ??????????????????? - Foraminiferal zonation of early early Carboniferous from the south-western margin of Yangtze platform. ??????? - Acta Micropalaeontologica Sinica. 3: 293-308. page(s): p. 302 (Chinese), p. 305 (English), figs. 20-22 (holotype fig. 20).