Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 342, Figs. 19-23: L. Cretaceous (U. Berriasian), Cernavoda Pod, Romania. 19, Transverse section; 20, side view; 21-23, apertural views, magnification not given (from Neagu, 1984). courtesy of Michael Hesemann https://foraminifera.eu
