Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 444, Figs. 10-13: M. Paleocene (Ynezian), Anita Formation, Santa Barbara County, California, USA. 10, 11, Side view of paratypes, x 90; 12, 13, side and top views of holotype, x 100 (from Akpati, 1966).