Illiger's saddle-back tamarin

Illiger's saddle-back tamarin (Leontocebus illigeri) is a species of saddle-back tamarin, a type of small monkey from South America. Illiger's saddle-back tamarin was formerly considered to be a subspecies of the brown-mantled tamarin, L. fuscicollis. It is closely related to the Andean saddle-back tamarin. It is endemic to the Peruvian Amazon and its type locality is in Loreto, Peru, at the left bank of the lower Rio Ucayali.

Illiger's saddle-back tamarin has a head and body length of between 175 mm and 205 mm with a tail length between 300 mm and 305 mm long. Males weigh about 292 g and females weight about 296 g.

The IUCN rates it as near threatened from a conservation standpoint.