Description Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 377, Figs. 1-6: L. Miocene (Burdigalian), East Borneo. 1, Axial section, magnification not given, Iength 2-2.5 mm; 2, exterior, X 10; 3, 4, equatorial sections, part enlarged, x 133, and entire section, x 70; 5, structural diagram, x 50; 6, axial section, x 70 (1, from L. Rutten, 1912; 2-4, 6, from van der Vlerk, 1929; 5, from Reichel, 1937).