Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 286, Figs. 4-6: L. Permian (Asselian), Samegai Formation, Shiga Prefecture, Honshu, Japan. 4, 5, Axial sections of topotypes, x 40; 6, sagittal section, x 40 (from Skinner and Wilde, 1965).