Description Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 332, Figs. 4-7: Holocene. 4, 5, Gulf of Mexico, opposite sides of hypotype, x 56 (from Loeblich and Tappan, 1964); 6, 7, Adriatic; 6, young individual showing spiral stage, x 50; 7, optical section of two-chambered specimen, x 15 (from von Roboz, 1884).