Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 585, Figs. 1-4: U. Cretaceous (U. Cenomanian), Dover, Kent, England. 1, Paratype with dissected final chamber showing internal tube, x 270; 2, paratype, acid dissected to show internal tube, x 75; 3, 4, holotype, side view, x 70, and enlarged apertural region, x 230; all SEM (from Owen. 1971).
