Folivorous langurs have cheek teeth with taller cusps and longer shearing blades than do hard-object-feeding mangabeys. Frugivores, and those with broad diets, are intermediate in occlusal relief ...

An elongated skull plus larger molars and canine teeth differentiate Popa langurs from other langur species. Otherwise, they are very similar to their langur cousins. Popa langurs are primarily ...

The golden langur lives only in Bhutan and adjacent Assam. It probably evolved in geographic isolation on the western side of the Manas river. On the other side of the river is its close cousin ...