Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 329, Fig. 17: Holocene, Galapagos Islands, Pacific. Side view of holotype, x 165 (from McCulloch, 1977). courtesy of Michael Hesemann https://foraminifera.eu