WoRMS source details
Yabe, H. (1918), Notes on Operculina-rocks from Japan, with remarks on "Nummulites" cumingi Carpenter, Science Reports of the Tohoku University, Sendai, ser. 2, Geology 4:104-126.
364178
Yabe, H. (1918), Notes on Operculina-rocks from Japan, with remarks on "Nummulites" cumingi Carpenter, Science Reports of the Tohoku University, Sendai, ser. 2, Geology 4:104-126
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Operculinella Yabe, 1918 (original description)
