Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 180, Figs. 4-7: L. Cretaceous (Barremian), Sardinia, ltaly. 4, Tangential section crossing the marginal zone, x 138; 5, slightly oblique horizontal section crossing the adult chambers, x 55; 6, embryonal area of holotype, x 138; 7, entire axial section of holotype, x 55 (from Cherchi and Schroeder, 1976).