Description Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 229, Figs. 25-27: L. Carboniferous (M. Tournaisian), S. Urals. 25, 26, Edge and side views, x 53; 27, horizontal section showing chamber arrangement, dotted line indicating opposed chambers of the pairs, x 53 (from Chernysheva, 1941).