Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 580, Figs. 1-3: M. Eocene, Cook Mountain Formation, Claiborne Group, Winn Parish, Louisiana, USA. Base, side, and apertural views of topotype, x 296 (from Loeblich and Tappan, 1964).