Description Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 415, Figs. 1-3: Miocene. 1-3, Culebra Formation, Panama Canal Zone; 1, Weathered specimen, x 10; 2, broken test showing cast of exterior and part of preserved test, x 10; 3,large specimen showing breakage and repair, x 13 (from Cushman, 1918).