Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 364, Figs. 13-15: U. Eocene, New Guinea. 13, Side view, x 14; 14, vertical section showing completely enveloping chambers with apertural trematophores of successive chambers alternately at opposite ends of the test, x 20; 15, horizontal section showing radiating vertical septula, x 18 (from Crespin, 1962).
