The northern plains gray langur belongs to the genus
Semnopithecus along with the other Indian langurs. The
southern plains gray langur was once classified as a subspecies of
S. entellus, i.e.,
S. entellus dussumieri and later regarded as a separate species, i.e.,
S. dussumieri, but is now regarded as an invalid taxon. Most of the specimens that had been regarded as
Semnopithecus dussumieri fall within the revised range of
Semnopithecus entellus. ==Description==