DistributionRead full entry
Range DescriptionThere are two recognized subspecies:
Ateles fusciceps fusciceps is endemic to Ecuador, in the north, west of the Andes, in the Province of Esmeraldas, and, at least historically it would seem, south as far the Cordillera de Colonche (Tirira 2007). There are two populations remaining: one in the Chongon Colonche Mountain Range and the another in the Cotacachi-Cayapas Reserve and surrounding forests in the north. Hernández-Camacho and Cooper (1976) suggested that A. f. fusciceps might occur in southern Colombia, south of the Río Mira, continuous with the populations in Ecuador, but no evidence has been forthcoming regarding this.
Ateles fusciceps rufiventris ranges from the western cordillera of the Andes from south-western Colombia, northward on west side of the Río Cauca to eastern Panama (Cerro Pirre and the basin of the Río Bayano of the Pacific coast) (Rylands et al. 2006). The Cerro Pirre or the Río Tucutí mark the border with A. geoffroyi grisescens. In Colombia, A. f. rufiventris occurs throughout the Pacific lowlands except for Juradó, norh-western part of the Department of Chocó, supposedly the domain of A. g. grisescens (Hernández-Camacho and Cooper 1976; Defler, 2003, 2004). It occurs in the Urabá region in north-western Antioquia, Córdoba, Sucre, and northern Bolívar east to the lower Río Cauca along the western bank to south-central Antioquia. The most southerly record in Colombia is Barabacoas, Department of Nariño, and the most northerly is southern bank of the Canal del Dique, Cartagena. Hernández-Camacho and Cooper (1976) believed that it formerly occurred as far north as Pendales.
Ateles f. rufiventris does not occur in Ecuador and is discontinuous with A. f. fusciceps. Furthermore, this subspecies range in Colombia is likely fragmented in the southern part of its range. There are only two known locations in the Chocó region.