|Scientific Name:||Saguinus tripartitus (Milne-Edwards, 1878)|
|Taxonomic Notes:||Hershkovitz (1977) regarded this species as a subspecies of S. fuscicollis. Thorington (1988) concluded that the form tripartitus occurs on the right bank of the lower Río Napo where it would be sympatric with S. f. lagonotus and consequently that it was a distinct species. However, there is still no evidence that it is actually sympatric with S. f. lagonotus. Rylands et al. (1993, 2000) and Groves (2001, 2005) listed it as a species, but a re-evaluation of the evidence for its distribution indicates that both Hershkovitz (1977) and Thorington (1988) may have been wrong (Heymann 2000; Rylands and Heymann in prep.), and sympatry between S. f. lagonotus and S. tripartitus has yet to be confirmed.|
|Red List Category & Criteria:||Near Threatened ver 3.1|
|Assessor(s):||de la Torre, S. & Cornejo, F.|
|Reviewer(s):||Mittermeier, R.A. & Rylands, A.B. (Primate Red List Authority)|
This species is listed as Near Threatened in light of a projected future decline of around 25% over the course of 3 generations (18 years) due primarily to anticipated high rates of deforestation. Almost qualifies as threatened under criterion A3c.
|Previously published Red List assessments:|
|Range Description:||A species of the upper Amazon, found between the Rios Curaray and Napo in Peru, and the right bank of the Napo in Ecuador (Heymann 2000; Heymann et al. 2002). The western limits to the distribution of this species in Ecuador are not clearly defined, but Albúja (1994) extended it as far as the middle reaches of the Ríos Tiputini and Curaray (S. f. lagonotus occurs at the headwaters of the Río Curaray), the upper Río Cononaco, and the entire basins of the Ríos Yasuní and Nashiño. S. de la Torre (in litt., 1996) has observed Golden-mantle Saddleback Tamarins between the Ríos Yasuní and Indillama. Tirira (2007) stated that it occurs up to 400 m above sea level in Ecuador in the western limits of its range.|
Native:Ecuador (Ecuador (mainland)); Peru
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||Soini et al. (1989) reported that this species is common in Peru, and Aquino and Encarnación (1994) indicated that it is relatively abundant. Aquino et al. (2005) recorded a population density, based on 17 groups, of 13.5 individuals/km² in the Río Aushiri basin, Peru.|
|Current Population Trend:||Decreasing|
|Habitat and Ecology:||The Golden-mantle Saddleback Tamarin occurs in Amazonian lowland, terra firma and seasonally flooded forest, riparian forest, remnant forests or fringe patches, and secondary forest (Snowdon and Soini 1988; Tirira 2007).|
Marmosets and tamarins are distinguished from the other monkeys of the New World by their small size, modified claws rather than nails on all digits except the big toe, the presence of two as opposed to three molar teeth in either side of each jaw, and by the occurrence of twin births. They eat fruits, flowers, nectar, plant exudates (gums, saps, latex) and animal prey (including frogs, snails, lizards, spiders and insects). Marmosets have morphological and behavioural adaptations for gouging trees trunks, branches and vines of certain species to stimulate the flow of gum, which they eat, and in some species form a notable component of the diet. The dentition of the tamarins (Saguinus and Leontopithecus) does not provide for gouging and they eat gums only when readily available.
Tamarins live in extended family groups of between four and 15 individuals, but usually 2-8. Aquino et al. (2005) recorded an average group size of 5.3 individuals (n=14, range 4-8). Kostrub (1997, 2002) observed groups of 4-7 individuals (n=10) in the Yasuní National Park.
Tamarins are monomorphic - exhibiting only minor differences in body and canine size.
|Major Threat(s):||The forests where S. tripartitus occurs along the Río Yasuní in Ecuador are remote and have to date suffered little impact from human activities, other than small localized encampments for petroleum prospecting (Albúja 1994). However, the occurrence of petroleum in the region, resulting in the current construction of the Pompeya-Iro highway, is reason for some concern for the future of these forests and their wildlife.|
|Conservation Actions:||This species occurs in the Yasuní National Park (982,300 ha) in Ecuador (Albuja 1994; Kostrub 1997; Tirira 2007). It is not recorded from any protected areas in Peru (Aquino and Encarnación 1994). It is listed on CITES Appendix II.|
|Citation:||de la Torre, S. & Cornejo, F. 2008. Saguinus tripartitus. The IUCN Red List of Threatened Species 2008: e.T19824A9020295.Downloaded on 20 May 2018.|
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