none
Geological Time: Paleogene Eocene
holotype
View of a specimen of Bathysiphon eocenicus Cushman & Hanna, 1927
The identification is based upon:
, : Cushman, J. A.; Hanna, G. D. (1927). Foraminifera from the Eocene near Coalinga, California. Proceedings of the California Academy of Sciences. (4) 16 (8): 205-229. Plate , Fig.
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