Range Description

Aotus nigriceps occurs throughout a large part of the central and upper Amazon, south of the mainstream and along the right bank of the Rio Jutaí in the west. In the east, it extends to the rios Tapajós and Juruena (Aotus azarae infulatus occurs to the east of the rios Tapajós and Juruena). It occurs throughout the state of Rondônia in Brazil, restricted to east of the Rio Guaporé. In Bolivia, it occurs north of the Río Madre de Dios in the Department of Pando (Hershkovitz 1983; Brown and Rumiz 1986; Anderson 1997), extending to the south-eastern and central Peruvian Amazon, west through the Río Ucayali basin to the east (right bank) of the Rio Huallaga (A. miconax coccurs to the west) to about 7ºS (Aquino and Encarnación 1994a).