Its mostly black coat has pale flecks and buffy limbs. Males and females differ in facial hair, and a survey along Brazil's Eiru River recorded groups of two to five.
The described specimens are mostly black with cream-colored flecks and pale buff limbs. Males have a bare black face; females have a soft black fringe and pale facial markings.
During a 2017 survey near the Eiru River, 21 sightings represented 12 groups, each with two to five animals.
An extinction-risk assessment has not been added yet.