Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 353, Figs. 4-6: Holocene, Pacific, off Pilas and Bubnan Islands, Philippines, at 20-40 m. Apertural view and opposite sides of holotype, x 61 (from McCulloch, 1977). courtesy of Michael Hesemann https://foraminifera.eu
