Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 296, Figs. 1-2: L. Permian, L. Wushan Limestone, Mitsang Gorge, China. 1, Sagittal section of paratype, x 15; 2, axial section of lectotype, x 15 (from J. S. Lee, 1934). courtesy of Michael Hesemann https://foraminifera.eu