Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 444, Figs. 14-17: 14, 15, 17, Pliocene, Italy; 16, Holocene, Adriatic. 14, 15, Side and top views, x 65; 16, longitudinal section, x 34; 17, side view, x 65 (14, 15, 17, from Loeblich and Tappan, 1964; 16, from Selli, 1944).