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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 218, Figs. 1-4: L. Carboniferous (Visean). 1-3, Northumberland, England, side, edge, and basal view of neotype (BMNH P40403), x 84 (from Loeblich and Tappan, 1964, Treatise on lnvertebrate Paleontology); 4, U. Visean, France, axial section, x 89 (from Mamet, 1969).
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Cózar, P.; Mamet, B. L. (2001). Planohowchinia (Lasiodiscidae, Foraminiferida), a new Late Viséan genus, southwestern Spain. The Journal of Foraminiferal Research. 31(3): 228-232., available online at (https://doi.org/10.2113/31.3.228) page(s): p. 229, Plate 1, figs. 1–11 (holotype fig. 1).
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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 218, Fig. 16-17: L. Carboniferous (U. Visean), Donbas.16, Horizontal section, x 100; 17, axial section of holotype, x 100 (from Brazhnikova and Yartseva, 1956). courtesy of Michael Hesemann https://foraminifera.eu
