Description Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 134, Figs. 11-13: Holocene, Arctic. Umbilical, spiral, and slightly oblique apertural views, x 100 (from Shchedrina, 1955).