Description Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 269, Figs. 8-9: M. Permian (U. Qixian), Chihsia Limestone, Nanking, China. Axial sections, x 40 (from Thompson, 1935).