Western Extension of the Range of Bearded Sakis: a Possible New Taxon of Chiropotes Sympatric with Cacajao in the Pico Da Neblina National Park, Brazil

Presently, two species of Chiropotes are recognized: Chiropotes albinasus and C. satanas. The latter includes three subspecies, namely C. s. satanas, C. s. chiropotes and C. s. utahicki (see Hershkovitz, 1985; Rylands et al., 2000; Groves, 2001). C. albinasus is found to the south of the Rio Amazonas between the Rios Xingu and Madeira, and C. satanas is found to the east of the Rio Xingu, south of the Rio Amazonas and to the east of the Rio Aracá, north of the Rio Solimões, including most of the Guianas and Southern Venezuela (Fig. 1).