It is also stipulated that a proto-nigrocincta may have come from Borneo during the Quaternary glaciation. On southern part of the Indonesian island of Sulawesi, most colonies are found above 400 m elevation, unlike its cousin A. cerana, of which most colonies are found below 400 m elevation.
The text describes the geographical distribution of two species of ants, one being a proto-nigrocincta and another being A. cerana, highlighting their differing elevation preferences in Sulawesi.