Description Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 67, Figs. 4-7: U. Cretaceous (Santonian-Campanian), North?west Pacific cores. 4-6, Opposite sides and periph?eral view of holotype, x 150; 7, smaller paratype, x 150 (from Krasheninnikov, 1973).