Description Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 430, Figs. 20-23: U. Jurassic (Volgian), N. Siberia. 20, Side view of holotype, x 58; 21, 22, paratypes, x 58; 23, section of holotype, x 290 (from V. A. Basov, 1968).