none
Geological Time: Paleogene Eocene
holotype
The identification is based upon:
, : Ujiie, H., and Kusukawa, T. (1969). Analysis of foraminiferal assemblages from Miyako and Yamada Bays, Northeastern Japan. Natural Science Museum, Tokyo, Bulletin. 12:735-772, pls. 1-5. Plate , Fig.
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