Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 218, Fig. 16-17: L. Carboniferous (U. Visean), Donbas.16, Horizontal section, x 100; 17, axial section of holotype, x 100 (from Brazhnikova and Yartseva, 1956). courtesy of Michael Hesemann https://foraminifera.eu
