Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 156, Figs. 7-11: U. Cretaceous (Cenomanian), England. 7, U. Greensand, Kent, subaxial section, x 67; 8, Folkestone, axial section of microspheric test, x 67 (7, 8, from Charollais and Brönnimann, 1965); 9-11, from Kent; 9, 10, side and top views, x 47; 11, specimen with broken exterior showing internal partitions and chamberlets, x 47 (9-11, from Loeblich and Tappan, 1964).
