Description Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 229, Figs. 17-20: L. Carboniferous (U. Visean), S. Urals. Median sections, x 100 (from Chernysheva, 1948).