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Sigmomorphina yokoyamai (Cushman & Ozawa, 1928)
Description Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 459, Figs. 8-10: Pliocene, Sawane, Sado Island, Japan. Opposite sides and apertural view of paratype (USNM Cushman Coll. 11859), x 53 (from Loeblich and Tappan, 1964).
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added on 2023-06-0991 viewsForaminifera taxa Sigmomorphina yokoyamai (Cushman & Ozawa, 1928)checked Le Coze, François 2023-06-09
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