Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 319, Figs. 17-22: Holocene. 17-19, S. Atlantic, at 118m, spiral side, edge, and umbilical side of hypotype, x 168; 20-22, Falkland Islands, S. Atlantic, at 454 m, opposite sides and edge view of lectotype (BMNH ZF 3568), x 180 (from Loeblich and Tappan, 1964).