Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 460, Figs. 4-6: L. Cretaceous (M. Albian), Netherlands. 4, 5, Opposite sides of holotype, x 75; 6, attached paratype, x 75 (from Fuchs, 1967).