First issued in release COL21.4.
Last used in release COL23.9
Published in
Peterson, R. H., Gauger, D. J., & Lankford, R. R. (1953). Microfossils of the Upper Cretaceous of northeastern Utah and southwestern Wyoming. Bulletin Utah Geological and Mineralogical Survey, 47: 1–158. https://www.marinespecies.org/foraminifera/aphia.php?p=sourcedetails&id=208843