Pseudorbitolina marthae Douvillé, 1910

Description:

Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification.  Van Nostrand, Reinhold Co. New York 1728 pp. Plate 171, Figs. 1-8: U. Cretaceous (Campanian), France. 1, Axial half section, x 70; 2, exterior of convex face showing apical inflation, x 20; 3, concave face of test showing marginal band and circular inflation, x 25; 4, test fragment showing abraded surface with small subepidermal chamberlets, broken edge of test showing distinct undivided zone toward the basal surface, x 50; 5, subaxial section, x 40; 6, transverse section cutting the early stage and showing the two embryonal chambers, x 30; 7, centrat part of same enlarged to show few septula in the deuteroconch, x 200; 8, oblique transverse section of upper surface showing peripheral chamberlets of median zone (from Neumann, 1978).