Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 440, Figs. 15-16: M. Jurassic (Callovian), Wyoming, USA. Side and top views of holotype, x 68 (from Loeblich and Tappan, 1950).
