27. Red-mantled Saddle-back Tamarin Saguinus lagonotus French: Tamarin 8 manteau rouge / German: Rotschultertamarin / Spanish: Tamarin de dorso rojo Taxonomy. Midas lagonotus Jiménez de la Espada, 1870, type locality is based on syntypes from three localities: two in Ecuador, “La Coca, Rio Napo ™” and “Humuyacu, Rio Napo ” nearby, and one at Tarapoto in Peru, a tributary of the left bank of the Napo. Restricted by P. Hershkovitz in 1977 to the right bank of the Napo. Formerly considered a subspecies of S. fuscicollis. Molecular genetic analysis has placed it in a distinct clade with S. tripartitus. Monotypic. Distribution. E Ecuador and NE Peru, S of the rios Napo and Curaray, E to the Rio Amazonas, and N of the Rio Maranon; the SW limit is uncertain, but it occurs in the region of the rios Santiago, Chinchipe, and Cenepa,left bank tributaries of the Maranon. Descriptive notes. Head-body 24 cm (males) and 22 cm (females), tail 30 cm (males) and 32 cm (females); weight c.350-400 g. The Red-mantled Saddleback Tamarin has a black forehead, crown, throat, and sides of head. The mantle is reddish to dark mahogany. The rump and outer sides ofthighs are dark reddish like the mantle. Facial skin is black. There are short gray hairs around the mouth and sides of the nostrils, and also some sparse grayish hairs between the eyes, providingjust a pale suggestion ofthe chevron, which is very distinct in the closely related Golden-mantled Saddle-back Tamarin (S. tripartitus). The back is striated black with buffy colored hairs. Upper surfaces of hands and feet are black. The chest and inner sides of arms are reddish, but heavily washed with black or almost completely black. The tail is black except for a short reddish part at the base extending onto the rump. External genitalia are pigmented black. Habitat. Primary and secondary lowland rainforest. The Red-mantled Saddle-back Tamarin prefers dense vegetation in secondary forest and tree falls. Food and Feeding. Diets of the Red-mantled Saddle-back Tamarin consist of small fruits, nectar, gums and small animal prey. Breeding. There is no information available for this species. Activity patterns. There is no information available for this species. Movements, Home range and Social organization. Surveys for the Red-mantled Saddle-back Tamarin along the Rio Nanay in 1974 found it to be the second most common primate in the terra firma forests ofthe area, with densities of 2-6 groups/km? or 15-6 ind/km?. Otherwise, it has not been studied in the wild. Status and Conservation. CITES Appendix II. Classified as Least Concern on The [UCN Red List (as S. fuscicollis lagonotus). The Red-mantled Saddle-back Tamarin is widespread and common. In 1982, it was reported to be one of the most frequently encountered primates on the Rio Nanay, a left bank tributary of the Rio Amazonas, just above the Rio Napo. It occurs in Allpahuayo-Mishana National Reserve in Peru and possibly in the lowland forests in Sangay National Park in Ecuador. Bibliography. Aquino & Encarnacion (1994b), Freese, Freese & Castro (1977), Freese, Heltne et al. (1982), Hershkovitz (1966, 1977), Heymann, Encarnacion & Canaquin (2002), Hodun et al. (1981), Kostrub (1997), Matauschek et al. (2011), Mittermeier et al. (1978), Rylands, Coimbra-Filho & Mittermeier (1993), Rylands, Matauschek et al. (2011), Snowdon & Soini (1988), Soini et al. (1989), Thorington (1988), Tirira (2007), de la Torre (1996, 2000).

Published as part of Russell A. Mittermeier, Anthony B. Rylands & Don E. Wilson, 2013, Callitrichiade, pp. 262-346 in Handbook of the Mammals of the World – Volume 3 Primates, Barcelona :Lynx Edicions on pages 324-325, DOI: 10.5281/zenodo.5730714