Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 452, Fig. 10: L. Cretaceous (Albian), Gault, Folkestone, Kent, England. Side view, x 148 (from Loeblich and Tappan, 1964).