Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 468, Figs. 17-18: U. Triassic (Camian), Yunnan Province, China. 17, Side view of holotype, x 60; 18, side view of paratype, x 60 (from Hu, in He and Hu, 1977).