Description Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 99, Figs. 10-13: U. Jurassic, Sumatra. 10, Megalospheric juvenile in median section, x 14; 11, slightly oblique axial sec?tion of megalospheric adult, x 14; 12, 13, axial section of megalospheric adult, x 14, and central part enlarged, x 24 (from A. Silvestri, 1932).