Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 187, Figs. 8-12: U. Cretaceous (Navarro Group), Texas, USA. 8, 9, McQueeney, Texas; 8, part of longitudinal section showing pyrite-infilled canaliculi that may bifurcate near the outer surface of the wall, x 250; 9, center of basal view of slightly etched specimen to show globular proloculus and numerous chambers in the early whorls, SEM, X 300 (8, 9, from Loeblich and Tappan, 1985); 10-12, Austin, Travis County, base, side, and top views of topotype, x 68 (from Loeblich and Tappan, 1964).
