This saki occurs in the northwestern Amazon of Brazil, Colombia, and Peru. Records place it north of the Solimões in Brazil, north of the Napo in Peru, and south of the Caquetá in Colombia.
Both sexes have black fur with sparse pale speckling and very white hands. Males have conspicuous white hairs across the lips.
The type locality is forest between the Rio Negro and Rio Solimões in Brazil. In northern Peru, a subadult male specimen was recorded on the left bank of the Río Tamboryacu, north of the Río Napo.
An extinction-risk assessment has not been added yet.