Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 189, Figs. 16-18: U. Paleocene (Landenian), Salt Mountain Formation, Clarke County, Alabama, USA. Opposite sides and top view of holotype, x 74 .
