Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 458, Figs. 8-11: Pliocene, Sawane, Sado Island, Japan. Opposite sides, apertural, and basal views of paratype, x 15 (from Loeblich and Tappan, 1964).
