Description Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 222, Figs. 15-17: Silurian (Ludlovian), Siberia, Russia. 15, Longitudinal section of holotype, x 140; 16, 17, paratypes, x 140 (from Lipina, 1959).