Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 226, Figs. 10-15: U. Permian, S. Primorye, Russia. 10, Transverse section showing vertical radial partitions, x 100; 11, 12, transverse sections, x 50; 13, 14, holotype, cellulose peel of transverse section, and longitudinal thin section of same specimen oriented as shown by line in fig. 13, x 70; 15, longitudinal section, x 50 (from Sosnina, 1983).