American South USA
Geological Time: Carboniferous Pennsylvanian
the specimen was picked and photographed by Michael Hesemann
with assistance of Dr. Georg Rosenfeldt, the raw material is provided by
The identification is based upon:
Cushman, J.A. and Waters, J.A., 1930: Foraminifera of the Cisco Group of Texas The University of Texas Bulletin
No. 3019. Plate 4, Fig. 1-2