Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 445, Figs. 7-10: L. Pliocene, Italy. 7, Equatorial section, x 45; 8, idealized apertural view, x 61; 9, 10, side and apertural views, x 45 (from Selli, 1941).