Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 456, Figs. 27-29: U. Cretaceous (Cenomanian), Cambridge Greensand, Cambridge, England. Opposite sides and basal view of holotype, x 90.
