IUCN threat status:

Least Concern (LC)

Distribution

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Range Description

There are two recognized subspecies:

Saguinus imperator imperator (Brazil, Peru)
South-western Amazon, east of the upper Rio Purus, between the Purus and the Rio Acre (Hershkovitz, 1979). Izawa and Bejarano (1981) did not record S. i. imperator for Bolivia, but reported an isolated population on the left bank of the Rio Acre, in the basin of the Rio So Pedro in Brazil, in an area otherwise occupied by S. l. labiatus. Encarnacin and Castro (1990) found populations of S. i. imperator (but not S. l. labiatus) on the right and left banks of the Rio Acre near the Quebrada Ro Branco, approximately 20 km west of Inapari, close to the region indicated by Izawa and Bejarano (1981). The population on the south bank of the Ro Acre is evidently highly restricted, the subspecies not having been found anywhere else further south in Peru despite a number of surveys (Castro et al. 1990). It is not known how far it extends into Peru along the Rio Acre, nor whether it occurs between the Rio Purus and Pauin and the Rios Purus and Itux (Hershkovitz 1979).

Saguinus imperator subgrisescens Bolivia, Brazil, Peru
South-western Amazon, in Brazil along the east (right bank) of the upper Rio Juru east to the Rios Tarauac and Jurupar, to the Brazil/Peruvian frontier. Into Peru, west from the Juru headwaters, it occurs as far as the foothills of the Andes in the upper Ro Ucayali, east of the mouth of the Ro Apurimac and to the south of the Ros Urubamba and Inuya. Its range extends east into Bolivia on both sides of the Ro Madre de Dios (Izawa 1979). It is probably limited to the south of the Ro Tahuaman. Izawa and Bejarano (1981) reported it only from the Ro Muyumanu basin, a south bank tributary of the Ro Tahuaman. Castro et al. (1990) found that it was absent from the area between Iapari (just south of the Ro Acre) and Iberia (north bank of the Ro Tahuaman) in Peru where S. l. labiatus occurs. Aquino and Encarnacin (1994) extended the range indicated by Hershkovitz (1979) east to the basin of the Ro Tambopata to the Bolivian border, indicating that the Ro Madidi, an eastern tributary of the Ro Beni in Bolivia, may mark the southern limit to this species.

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© International Union for Conservation of Nature and Natural Resources

Source: IUCN

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