Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 456, Figs. 12-15: L. Cretaceous (Valanginian), Germany. Opposite sides, apertural and basal views, x 156 (from Loeblich and Tappan, 1964).
