Callicebus stephennashi, M. G. M. van Roosmalen et al., 2002

Russell A. Mittermeier, Anthony B. Rylands & Don E. Wilson, 2013, Phitheciidae, Handbook of the Mammals of the World – Volume 3 Primates, Barcelona: Lynx Edicions, pp. 432-483 : 462

11.

Stephen Nash's Titi

Callicebus stephennashi

French: Titi de Nash / German: Stephen-Nash-Springaffe / Spanish: Titi de Stephen Nash

Other common names: Stephen Nash's Titi Monkey

Taxonomy. Callicebus stephennashi M. G. M. van Roosmalen et al., 2002 ,

said to have been caught somewhere along the middle to upper Rio Purus, Brazil.

There is no precise type locality. C. stephennashi is a member of the cupreus species group. Its distribution is probably in contact, or intergrades, with those of C. caligatus to the E and C. dubius to the W, in the Madeira-Purus interfluvium, although no data are available. Monotypic.

Distribution. SW Amazon Basin in the states of Amazonas and Rondoénia, Brazil; little is known ofits distribution in the wild, although it is presumed to coincide with the Ipixuna-Mucuim interfluvium on the right (S) bank of the Rio Purus, possibly extending as far S as the Rio Madeira in Rondonia.

Descriptive notes. Head-body 27 cm (males) and 28 cm (females), tail 42 cm (males and females); weight ¢.780 g (males and females). Male and female Stephen Nash's Titis are similar in size and coloration. Their bodies, crowns, and rumps are silvery or buffy mixed with brownish or brownish-black agouti. Proximal portion of tail silvery, mixed with brownish to blackish-brown agouti, fading to black mixed with white or buffy. Distal one-half to two-thirds of tail is entirely white or buffy. Sideburns, underparts, inner sides of limbs, and lower portions are completely bright or dark red. Hands and feet are entirely silvery buffy or white, except for proximal one-third of feet, which are red. Forehead and anterior part of crown are black, contrasting sharply with the agouti nape.

Habitat. Lowland Amazon rainforest at elevations of 100-200 m.

Food and Feeding. There is no specific information available for this species, but the diet of Stephen Nash's Titi is probably similar to that of othertitis in the cupreus species group;i.e. highly frugivorous, with some consumption of leaves, flowers, and arthropods.

Breeding. There is no specific information available for this species, but all titis form monogamous breeding pairs. The male provides parental care by carrying the single offspring.

Activity patterns. There is no information available for this species.

Movements, Home range and Social organization. There is no information available for this species.

Status and Conservation. CITES Appendix II. Classified as Least Concern on The [UCN Red Last. Little is known of the status of Stephen Nash's Titi in the wild, although it is unlikely to suffer any major impact at the present time due to the remoteness of its geographic distribution. Nevertheless, the small size of its presumed distribution and the lack of protected areas in its range would probably be problematic in the face of eventual impacts in the region.

Bibliography. Ferrari et al. (2000), Norconk (2011), Rohe & Silva (2009), van Roosmalen et al. (2002) , Veiga (2008e).

Figures

On following pages: 4. Olallas’ Titi (Callicebus olallae); 5. San Martin Titi (Callicebus oenanthe); 6. Coppery Titi (Callicebus cupreus); 7. Red-crowned Titi (Callicebus discolon; 8. Ornate Titi (Callicebus ornatus); 9. Chestnut-bellied Titi (Callicebus caligatus); 10. Doubtful Titi (Callicebus dubius); 11. Stephen Nash's Titi (Callicebus stephennashi); 12. Caqueta Titi (Callicebus caquetensis);, 13. Ashy Titi (Callicebus cinerascens); 14. Hoffmanns's Titi (Callicebus hoffmannsi); 15. Lake Baptista Titi (Callicebus baptista); 16. Red-bellied Titi (Callicebus moloch).

Distribution. SW Amazon Basin in the states of Amazonas and Rondoénia, Brazil; little is known ofits distribution in the wild, although it is presumed to coincide with the Ipixuna-Mucuim interfluvium on the right (S) bank of the Rio Purus, possibly extending as far S as the Rio Madeira in Rondonia.