Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 439, Figs. 22-24: Holocene, E. Gulf of Mexico, at 386 m. 22, Side view of holotype, x 50; 23, apertural view of same showing radiating slits of aperture, x 300; 24, part of wall surface enlarged to show tiny pores, x 7000 (all SEM, from Loeblich and Tappan, 1986).
