Nummofallotia cretacea (Schlumberger, 1900)

Description :

 Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification.  Van Nostrand, Reinhold Co. New York 1728 pp. Plate 400, Figs. 1-4: U. Cretaceous (Senonian); 1-4, Dordogne, France. 1, Axial section showing original lenticular form, x 30; 2, equatorial half-section of free specimen, x 50; 3, detached umbilical button, possibly a result of recrystallization, x 50; 4, axial section of specimen with advanced stage of recrystallization producing umbilical buttons at each side (appearing white), x 30 (from Barrier and Neumann, 1959). courtesy of Michael Hesemann https://foraminifera.eu