Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 188, Figs. 1-3: U. Cretaceous, Westphalia, Germany. Side, top, and basal views, x 62 (1, 2, from Loeblich and Tappan, 1964).
