Description Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 349, Figs. 1-4: Holocene, Atlantic, off Northeast USA, at 2,725 m. 1, 2, Edge and side views of holotype, x 20; 3, edge view of paratype with complex aperture, x 20; 4, half-sectioned paratype showing ontogenetic changes in chamber arrangement, x 20 (from Loeblich and Tappan, 1955).