IUCN threat status:

Near Threatened (NT)

Distribution

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Range Description

Saimiri ustus occurs south of the Rio Amazonas in Brazil. It has more restricted range than was supposed by Hershkovitz (1984), who placed it east of the Rio Purus south as far as the region of the rios Sepatini and Guaporé, east to the Rios Xingu or Iriri. J. S. Silva Jr. (pers. comm.) believes it extends east of the Rio Purus to the riosTapajós and Juruena, with its range including a belt along the southern margin of the Rio Solimões along the lower reaches of the southern tributaries, including the rios Coarí and Tefé to the east (left bank) of the Rio Juruá. It extends south to the upper reaches of the Rio Guaporé and the headwaters of the Juruena. It is replaced by Saimiri sciureus sciureus just south of the Rio Amazonas, east of the Tapajós, on the Ilha Tupinambarama, east to Parintins.

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Source: IUCN

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