Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 296, Figs. 9-10: . L. Permian (Sakmarian), S. Primorye, E. Siberia, Russia. 9, Axial section of paratype, x 100; 10, axial section of holotype, x 100 (from Sosnina, 1981). courtesy of Michael Hesemann https://foraminifera.eu
