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Traits source details
Hanzawa, S. (1935), Some fossil Operculina and Miogypsina from Japan and their stratigraphical significance, Science Reports of the Tohoku University. ser. 2, Geology 18(1): 1-29.
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Hanzawa, S. (1935), Some fossil Operculina and Miogypsina from Japan and their stratigraphical significance, Science Reports of the Tohoku University. ser. 2, Geology 18(1): 1-29.
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Cyclammina formosensis Yabe & Hanzawa, 1935 † (original description)
Operculina complanata subsp. japonica Hanzawa, 1935 † (original description) Operculinoides Hanzawa, 1935 accepted as Nummulites Lamarck, 1801 † (original description) |