Description Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 21, Fig. 10: Holocene, North Pacific, near Kurile-Kamchatka Trench. Side view showing numerous rounded apertures, x 72 (from Saidova, 1970).