Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 581, Figs. 11-13: L. Cretaceous (U. Barremian), Northeast Azerbaijan. Basal, side, and top views of holotype, x 60 (from Poroshina, 1966).
