Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 249, Figs. 10-11: . L. Carboniferous (U. Visean), Asbian, Great Britain. 10, Anglesey, Wales, sagittal section of holotype; 11, sagittal section, x 75 (from Strank, 1983).