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Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 328, Figs. 1-4: U. Permian (Murgabian), Siberia, Russia. 1, 2, Holotype, cut in half and used for (half) equatorial section, and a subaxial section, as indicated by vertical lines, x 60: 3. equatorial section, x 54; 4, axial section, x 50 (from Sosnina, 1983). courtesy of Michael Hesemann https://foraminifera.eu
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Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 328, Figs. 1-4: U. Permian (Murgabian), Siberia, Russia. 1, 2, Holotype, cut in half and used for (half) equatorial section, and a subaxial section, as indicated by vertical lines, x 60: 3. equatorial section, x 54; 4, axial section, x 50 (from Sosnina, 1983). courtesy of Michael Hesemann https://foraminifera.eu
