none
Geological Time: Paleogene Oligocene
holotype
View of a specimen of Bitubulogenerina howei Cushman, 1935
The identification is based upon:
, : Cushman, J. A. (1935). Bitubulogenerina howei, a new species from the Lower Oligocene. Contributions from the Cushman laboratory for foraminiferal research. 11(1): 20-21. Plate , Fig.