Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 334, Figs. 3-5: L. Cretaceous (U. Valanginian), Germany. Opposite sides and apertural view of topotype, x 111 (from Loeblich and Tappan, 1964). courtesy of Michael Hesemann https://foraminifera.eu
