Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 271, Figs. 8-11: 8, sagittal section, Maping Limestone, Kwangsi, China, x 15; 9, sagittal section, Chuanshan Limestone, Chekiang, China, x 15; 10, 11, axial sections, Chuanshan Limestone, Chekiang, China, x 15 (from S. Chen, 1934). courtesy of Michael Hesemann https://foraminifera.eu
