Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 45, Figs. 15-17: U. Cretaceous (Cenomanian), Pawpaw Formation, Grayson County, Texas, USA. 15, 16, Side and top views of microspheric individual with broken base, x 10; 17, narrower megalospheric individual, x 10.
