DistributionRead full entry
Range DescriptionAccording to Hershkovitz (1984) and R. Wallace (pers. comm. 2007), S. b. boliviensis occurs in the upper Amazon, south of the Rio Solimes-Amazonas, between the Rios Juru and Madeira in the states of Amazonas and Acre, into Bolivia, west of the Rio Negro in northern Santa Cruz Department, in the departments of Pando, Cochabamba, Beni, and Santa Cruz. Wallace et al. (1998) did not find squirrel monkeys in the Noel Kempf Mercado National Park, and indicated that there are no records of this subspecies east of Perseverancia where they surveyed, on the Ro Negro, although there are reports of it occurring as far east as the upper Ro San Martn. In Peru, Aquino and Encarnacin (1994) indicated its occurrence south from the Ro Abujao, Department of Ucayali, to Bolivia, and in parts of Hunaco, Pasco, Junn and Cusco. Altitudinal range according to Hershkovitz (1984) is 50 to 500 m above sea level. It is not known which of the two subspecies may occur on the upper Rio Juru, between the west (left) bank of the Jurua and the Ro Ipixuna in Brazil and north of the Ro Sheshea to the Rio Abujao in Peru (Hershkovitz 1984; Aquino and Encarnacin 1994).
Saimiri boliviensis peruviensis occurs south of the Ros Amazon and Maran, between the Rios Huallaga and Ucayali, from the west bank of the Ro Tapiche (tributary of the Ucayali), south between the Ros Pachitea and Tambo (Hershkovitz 1984). Hershkovitz (1984) indicated that the southern limits were unknown, but presumed to be at least as far as the Ro Abujao (a west bank affluent of the Ro Ucayali). Aquino and Encarnacin (1994) indicated the region of the Ro Peren, a tributary of the Rio Pachitea. Aquino and Encarnacin (1994) reported that is sympatric with Saimiri sciureus macrodon east of the Ro Ucayali from about 04S southward to the Rio Abujao. In their map, S. b. boliviensis extends across the Rio Blanco to the Ro Yavar. Its occurrence in Brazil to the east of the Rio Javar has not been documented.