Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 101, Figs. 3-7: U. Jurassic (Kimmeridgian), Portugal. 3, 4, Equatorial sections of megalospheric tests, x 27; 5-7, opposite sides and top view of exterior, x 27 (from Maync, 1959).