Description Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 20, Fig. 4: Silurian (Llandoverian-Wenlockian), Chimney Hili Limestone, Oklahoma, USA. Lectotype, x 62 (from Loeblich and Tappan, 1964).