The occurrence of Hantkenina alabamensis in a foraminiferal assemblage from basal calcareous shale of the Kopilis formation in the Khasi hills, Assam, India, confirms the upper Eocene age assigned to the beds.

GeoRef, Copyright 2004, American Geological Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States