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Fornasini, C. (1902). Intorno ad alcune specie di «Polymorphina» istituite da d'Orbigny nel 1826. Rivista Italiana di Paleontologia. 8(1): 11-13., available online at (http://www.biodiversitylibrary.org/item/50736#page/25/) page(s): p. 12 pl. 1 fig. 8
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Fornasini, C. (1902). Intorno ad alcune specie di «Polymorphina» istituite da d'Orbigny nel 1826. Rivista Italiana di Paleontologia. 8(1): 11-13., available online at (http://www.biodiversitylibrary.org/item/50736#page/25/) page(s): p. 12 pl. 1 fig. 5
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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 457, Figs. 13-18: U. Triassic (Rhaetian), Shublik Formation, N. Alaska, USA. 13-15, Apertural, side, and basal views of megalospheric paratype, x 95; 16-18, apertural, side, and basal views of microspheric holotype, x 95 (from Tappan, 1951).
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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 456, Figs. 30-32: U. Cretaceous (Senonian), France. Opposite sides and edge view, x 87 (Figs. 27-32 from Loeblich and Tappan, 1964).
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Fornasini, C. (1901). Intorno a la nomenclatura di alcuni nodosaridi neogenici italiani. Memorie della Reale Accademia delle Scienze dell'Istituto di Bologna. 5(9) [1901-1902]: 45-76., available online at (http://www.biodiversitylibrary.org/item/120183#page/79/) page(s): p. 70 tf. 22
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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 459, Figs. 20-22: U. Jurassic (Malm a), northeast of Reichenbach, Württemberg, Germany. Topotype specimens attached to shell fragments and showing variation in growth, x 19.
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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 459, Fig. 24: L. Cretaceous (Albian), Gault, England. Specimen broken free of the attachment, x 70.
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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 461, Fig. 6: U. Jurassic (Oxfordian), Germany. Side view of holotype, x 44 (redrawn from Paalzow, 1932).
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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 461, Figs. 9-10: 9, L. Cretaceous (Albian), Duck Creek Formation, Horseshoe Bend of Red River, Love County, Oklahoma, USA; 10, U. Cretaceous (Cenomanian), Grayson Formation, Denton County, Texas. 9, Side view of holotype, x 75; 10, hypotype, x 75 (9, from Loeblich and Tappan, 1964).
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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 456, Figs. 16-19: U. Cretaceous (Maastrichtian), Siberia, Russia. Opposite sides, base, and edge view, x 72 (from Dain, in N. K. Bykova et al., 1958).
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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 456, Figs. 12-15: L. Cretaceous (Valanginian), Germany. Opposite sides, apertural and basal views, x 156 (from Loeblich and Tappan, 1964).
