Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 330, Figs. 1-2: Pliocene, Ryukyu Limestone, Kikaijima, Ryukyu Islands, W. Pacific. Apertural and side views of holotype (USNM Cushman Coll. 24861), x 44 (from Loeblich and Tappan, 1964).
