Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 463, Figs. 3-4: Quaternary, DSDP Site 357, Rio Grande Rise, Southwest Atlantic. Side and apertural views, SEM, x 300 (from Patterson and Pettis, 1986).