Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 452, Figs. 1-2: U. Cretaceous (Coniacian), Brezno Formation, Vysoká, E. part of Bohemian Cretaceous basin, Czech Republic. 1, Side view of broken specimen showing discontinuous ribs, x 100; 2, nearly complete individual showing produced aperture, x 50 (new SEM figures in Loeblich and Tappan, 1987)