Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 426, Figs. 1-4: Oligo-Miocene, Cuba. 1, Axial section showing interseptal pillars, x 30; 2, equatorial section, x 30; 3, structural diagram of parts of last three chambers, showing apertures (a), pillars (p), and septa (s); 4, exterior of holotype, x 13 (from Reichel, 1952). courtesy of Michael Hesemann https://foraminifera.eu