Description Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 175, Figs. 1-4: M. Jurassic (Bathonian), France. 1, 4, Section parallel to axis, x 40 and x 35; 2, basal section, x 35; 3, oblique section through early spiral part, x 35 (from Pfender, 1933).