Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 463, Figs. 5-7: Pleistocene, Timms Point Formation, San Pedro, California. 5, 6, Side and apertural views, SEM, x 300; 7, viewed in transparency to show entosolenian tube, x 150 (from Patterson and Richardson, 1987).