DistributionRead full entry
Range DescriptionThere are three recognized subspecies:
Saguinus nigricollis nigricollis
Hershkovitz (1977) recorded that it occurs between the Rios Solimes-Amazonas and I-Putumayo, at least as far west as the mouth of the Ro Napo. Aquino and Encarnacin (1994) documented its occurrence west from there along the left (north) bank of the Ro Napo in Peru, upstream at least as far as the Ros Aguarico, Lagartococha and Gepi on the border with Ecuador, where it is replaced by S. n. graellsi, as was proposed by Hershkovitz (1982). In Colombia, its distribution is poorly known, but Hernndez-Camacho and Cooper (1976) and Defler (1994) reported that it occurs north of the Ro Putumayo to the Ro Caquet, and east to the Brazilian border, indicating its, as yet undocumented, presence between the Rios Japur and Ia in Brazil (Hershkovitz 1977, 1982). However, evidence for its occurrence north of the Ro Putumayo in Colombia is sparse. Its supposed presence in two large protected areas in this region (La Paya National Natural Park and Cahuinar National Natural Park) has not yet been confirmed (Defler 1994). Hernndez-Camacho and Cooper (1976) reported that they observed S. n. nigricollis groups mixed with S. f. fuscus at Puerto Leguzamo, located on the north bank of the upper Putumayo. According to them S. n. graellsi is sympatric with S. n. nigricollis at Puerto Leguzamo, and west from there between the Ros Putumayo and Caquet. For this reason, they argued that the form graellsi should be considered a distinct species (see also Defler 1994). Otherwise the only evidence is that of a young specimen collected in 1960 by H. Granados and H. Arvalo labeled Caquet-Putumayo, as reported by Hershkovitz (1982) who pointed out that it may have been taken from the left bank of the Ro Putumayo. Hershkovitz (1982) argued that the evidence for the occurrence of S. n. nigricollis north of the Ro Putumayo is not yet conclusive. In this case, the possibility remains that its range is restricted to the right bank of the Ro Putumayo. This being so, Hershkovitz (1982) pointed out that there would be a gap between the ranges of S. n. hernandezi (north of the Ro Caquet) and S. n. graellsi (south of the Ro Putumayo). Hernndez-Camacho and Cooper (1976), however, give place S. n. graellsi as occurring north of the upper reaches of the Ro Putumayo, north to the Ro Caquet, in which case the ranges would be continuous with S. n. hernandezi north of the Ro Caquet. The exact range of S. n. nigricollis in Colombia remains unclear. North of the Ro Putumayo, S. n. nigricollis would be sympatric with S. fuscicollis fuscus.
Saguinus nigricollis graellsi
Saguinus nigricollis graellsi occurs in the upper Amazon, in southern Colombia, eastern Ecuador and north-eastern Peru. Its range is not well known, however, and our interpretation of the current evidence indicates that it is probably more restricted than is indicated by Hershkovitz (1977, 1982). According to Hernndez-Camacho and Cooper (1976), in Colombia it occurs south from right (south) bank of the upper Ro Caquet to the Ros Sucumbios and Putumayo on the border with Ecuador. Hernndez-Camacho and Cooper (1976) recorded that it occurred in the neighborhood of Puerto Ass on the upper Putumayo, east as far as Puerto Leguzamo. These authors informed that S. n. graellsi is sympatric with S. n. nigricollis in the region of Puerto Leguzamo, and the form graellsi should, therefore, be considered a distinct species, although doubts remain. Defler (1989, 1994) argued for this possibility, although Hernndez-Camacho and Defler (1988) listed it as a subspecies of S. n. nigricollis. Hershkovitz (1982) argued that there is no definite evidence for S. n. graellsi occurring north of Ecuador, and suggested that Black-mantle Tamarins reported by Hernndez-Camacho and Cooper (1976) may be either of the other two subspecies. He restricted its northern limit to the Ros Putumayo and Sucumbios, indicating as such that it does not occur in Colombia at all. According to Hershkovitz (1982), in Ecuador S. n. graellsi extends throughout a large part of the Amazon region, south from the Ro Putumayo, west to the foothills of the Andes. The altitudinal range is between 100 m and 1,000 m (Hershkovitz 1982). Hershkovitz (1977) suggested that the range in Ecuador may extend as far south as the right bank of the upper Ro Santiago, although in a later publication (Hershkovitz 1982) he was more conservative, giving the north (right) bank of the Ro Pastaza as the limit. The only specimens from the Ros Pastaza and Tigre are from their uppermost reaches in Ecuador.
According to Aquino and Encarnacin (1994), eastwards, S. n. graellsi extends into Peru along the right (south) banks of the Ro Napo to its mouth, and restricted to the north (right) banks of the Ros Amazonas and Maran. However, S. n. graellsi has not been recorded in Peru except for the banks of the Napo and Curaray, and its occurrence in the basins of the northern tributaries of the Ro Maran has yet to be confirmed. Aquino and Encarnacin (1994) reported that S. n. graellsi has never been found along the Rios Tigre and Pastaza, for example, despite a number of primatological surveys along these rivers between 1981 and 1986. The known distribution in Peru is restricted to the region between the Ros Nanay and Napo. Although occurring north of the Ro Napo in Ecuador, it extends east only as far the Ros Gep and Lagartococha on the frontier with Peru (Hershkovitz 1982), where it is replaced by S. n. nigricollis (Hershkovitz 1982; Aquino and Encarnacin 1994). It has been recorded recently in a number of localities in northern Ecuador between the Ros Napo and Putumayo, including the basins of the Ro Aguarico, Cuyabeno and Pacuyacu (S. de la Torre, in litt. 1996). However, it has not been found in the Yasun National Park, covering the basin of the Rio Yasun, where it would seem that only S. tripartitus and S. fuscicollis lagonotus occur (Albuja 1994; S. de la Torre, in litt., 1996). Although Hershkovitz (1977) argued for the restriction of the type locality to the right bank of the Ro Napo above the mouth of the Rio Curaray, no definite records or specimens are available for S. n. graellsi in Ecuador between these rivers (Hershkovitz 1977, 1982; Albuja 1994), and it would seem probable that only two Saguinus species occur there: S. tripartitus and S. fuscicollis lagonotus.
The distribution of S. n. graellsi therefore has yet to be clearly defined. However, if it occurs in Colombia it would be sympatric with S. fuscicollis fuscus, and in Ecuador and Peru it is sympatric, at least in some areas such as the upper reaches of the Rios Napo, Curaray, Pindo Yacu and Pastaza, with S. fuscicollis lagonotus (see Hershkovitz 1982; Aquino and Encarnacin 1994). It would appear that it does not occur between the Ros Curaray and Napo in Peru and Ecuador, and is not, therefore, sympatric with S. tripartitus. Tirira (2007) reported that the limjits of its range in Ecuador are poorly defined. In the north of the country, it is not known if it reaches the ros Sucumbos and Putumayo, and that the identity of the tamarins to the south of the Ro Napo in the provinces of Oreallana and Pastaza is uncertain.
Saguinus nigricollis hernandezi
Saguinus n. hernandezi occurs in eastern Colombia between the Ros Caquet, Caguan, and Orteguaza and the base of the Cordillera Oriental, Intendencia de Caquet (Hershkovitz 1982). K. Izawa (in Hershkovitz 1982) reported that S. n. hernandezi was not seen on the north bank of the Ro Caquet, but it has been found to the north and north-east of the Caquet in the Department of Meta, Angostura I, on the right bank of the Ro Guayabero (Hernndez-Camacho and Defler 1988; Tovar 1994). Presumably it occurs at least along the eastern slopes of the Andes from the headwaters of the Ro Caguan to the Ro Guayabero. The altitudinal range is 150-500 m above sea level (Hershkovitz 1982).