Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 440, Figs. 13-14: L. Jurassic. 13, L. Pliensbachian, Saint Vincent Sterlange, Dept. Vendée, France; 14, U. Pliensbachian (Domerian), Sweden. 13, Side view, x 222; 14, top view, SEM, x 255 (13, from Loeblich and Tappan, 1964).