title: New records and range expansion of the white bald uakari (Cacajao calvus calvus, I. Geoffroy, 1847) in Central Brazilian Amazonia.
abstract: The white bald uakari (Cacajao calvus calvus) is among the least studied of the Amazonian primates and is found exclusively in remote areas of the central Amazon. The geographic distribution of this subspecies is still uncertain, and information on current threats and its conservation status is sparse. In this paper, we identify new locations of occurrence and propose range expansion of the Cacajao calvus calvus. Between 2008 and 2010, six field expeditions were undertaken in the middle Solimões region to search for the subspecies and to conduct interviews with local residents regarding its presence. The presence of the white bald uakari was confirmed in the lower courses of the Juruá and lower Jutaí rivers, in addition to areas inside the Mamirauá Reserve, where its presence was expected. Results indicate an expansion and new limits on the geographic range of the subspecies, including its detection in areas in which it had not previously been reported and its exclusion from areas where white bald uakaris were assumed to occur. The new information provided by this study and the remaining shortcomings regarding the distribution of the calvus group point to the urgent need for further research on the geographic distribution and habitat use of this group, especially along the lower courses of the Juruá and Jutaí rivers, which remain little explored.
authors.affiliation: Instituto de Desenvolvimento Sustentável Mamirauá, Estrada do Bexiga, 2584, Bairro Fonte Boa, Tefé, AM, 69470-000, Brazil. nayaraprimatas@gmail.com.|Centro de Ciências Exatas e da Natureza, Programa de Pós-Graduação em Ciências Biológicas, Universidade Federal da Paraíba, Campus I-Cidade Universitária, s/n, Bairro Castelo Branco, João Pessoa, PB, 58059-900, Brazil. nayaraprimatas@gmail.com.
authors.forename: Nayara
authors.initials: N
authors.lastname: de Alcântara Cardoso
authors.affiliation: Instituto de Desenvolvimento Sustentável Mamirauá, Estrada do Bexiga, 2584, Bairro Fonte Boa, Tefé, AM, 69470-000, Brazil.
authors.forename: João
authors.initials: J
authors.lastname: Valsecchi
authors.affiliation: Instituto de Desenvolvimento Sustentável Mamirauá, Estrada do Bexiga, 2584, Bairro Fonte Boa, Tefé, AM, 69470-000, Brazil.
authors.forename: Tatiana
authors.initials: T
authors.lastname: Vieira
authors.affiliation: Instituto de Desenvolvimento Sustentável Mamirauá, Estrada do Bexiga, 2584, Bairro Fonte Boa, Tefé, AM, 69470-000, Brazil.
authors.forename: Helder Lima
authors.initials: HL
authors.lastname: Queiroz
mesh_terms: D063147:Animal Distribution; D000818:Animals; D001938:Brazil; D053820:Pitheciidae / Q000502:physiology*
keywords: Amazonia; Cacajao calvus; Geographic distribution; Várzea