Description Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 287, Figs. 4, 7: L. Permian (Asselian), USSR. 4, 7, Darvaz, axial sections, x 10 (from Leven and Shcherbovich, 1978).