Description Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 272, Figs. 1-3: U. Carboniferous (Moscovian), Pechora region. 1, Axial section, x 13; 2, axial section of holotype, x 10; 3, near sagittal section, x 13 (from Rauzer-Chernousova et al., 1936).