Description Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 41, Figs. 12-13: Paleocene (Danian), Sakhalin Island, Russia. Opposite sides of holotype, x 75 (from Serova, 1966).