Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 366, Figs. 1-6: M. Eocene (Biarritzian), Lerida Province, Spain. 1, Tangential section, x 20; 2, axial section of microspheric test, here designated as lectotype, x 20; 3, axial section of slightly crushed microspheric test, x 20; 4, axial section of megalospheric test, x 40; 5, axial section intersecting the trematophore, x 20; 6, axial section of megalospheric test, x 40 (from Caus, 1979).
