Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 18, Figs. 3-4: U. Cretaceous (Campanian-Santonian), Kazakhstan. Side and edge views of holotype, x 50 (from Suleymanov, 1969). courtesy of Michael Hesemann https://foraminifera.eu