Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 190, Figs. 5-7: Holocene, Pacific. 5, Side view of microspheric specimen, x 55 (from Cushman and McCulloch, 1939); 6, 7, off Guadalupe Island, Mexico, side and edge views of megalospheric paratype, x 86 (from Loeblich and Tappan, 1964).