Trachypithecus selangorensis (Roos, Nadler & Walter, 2008)

Russell A. Mittermeier, Anthony B. Rylands & Don E. Wilson, 2013, Cercopithecidae, Handbook of the Mammals of the World – Volume 3 Primates, Barcelona: Lynx Edicions, pp. 550-755 : 743-744

146.

Selangor Silvery Langur

Trachypithecus selangorensis

French: Langur du Selangor / German: Selangor-Langur / Spanish: Langur de Malasia

Other common names: Selangor Lutung, Selangor Silvery Lutung, West Malaysian Silvered Langur

Taxonomy. Trachypithecus cristatus selangorensis Roos, Nadler & Walter, 2008 ,

West Malaysia, Selangor Province, Kuala Selangor (3° 20° N, 101° 20’ E).

T. selangorensis is closely related to T. cristatus , T. auratus , T. mauritius , T. germaini , and T. margarita , and together they form the cristatus species group. Monotypic.

Distribution. W Peninsular Malaysia, confined to a Strip along the W coast from 6° N to 1° 30° N in the states of Kedah, Perak, Selangor, Negeri Sembilan, Melaka, and Johor.

Descriptive notes. Head-body 50.6-53.5 cm (males) and 45-8 cm (females), tail 70.4-82.3 cm (males) and 68 cm (females); no specific data are available for body weight. Body of the Selangor Silvery Langur is a uniform dark gray, and facial skin, hands, and feet are black. Face has no clear eye-rings. Gray whiskers are long and straight, and thus, clearly differ from the mussel-shaped whiskers in the Silvered Langur (1. cristatus ).

Habitat. Mainly riparian and mangrove forest, and occasionally plantations. The Selangor Silvery Langur is sympatric with the Dusky Langur (7. obscurus ), the Banded Langur ( Presbytis femoralis ), and the Pale-thighed Langur (P. siamenss).

Food and Feeding. The Selangor Silvery Langur is mainly folivorous, with leaves comprising up to 91% of its diet. It also eats fruits, seeds, flowers, and young shoots.

Breeding. There is no specific information available for this species, but the Selangor Silvery Langur is not a seasonal breeder. Neonatal Selangor Silvery Langurs are born with orange fur , and white skin on hands,feet, and face.

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

Movements, Home range and Social organization. The Selangor Silvery Langur lives in unimale-multifemale groups of 11-38 individuals (average 26-5), and smaller allmale groups. Home ranges are 20-43 ha. Adjacent home ranges overlap, but they are defended. Selangor Silvery Langurs travel only 200-500 m/day, usually led by a male. Lone males have also been observed. When a new male enters a group, infanticide might occur although it has not been confirmed.

Status and Conservation. CITES Appendix II. The Selangor Silvery Langur has not been assessed on The IUCN Red List. A major threat is habitat loss due to land clearance and forest fires, specifically in coastal regions. It occurs in Kuala Selangor and Bukit Nanas nature reserves in Peninsular Malaysia.

Bibliography. Bernstein (1968), Brandon-Jones et al. (2004), Furuya (1961), Groves (2001), Harding (2010), Hock & Sasekumar (1979), Marsh & Wilson (1981b), Nijman & Meijaard (2008b), Roos et al. (2008), Weitzel et al. (1988), Wolf & Fleagle (1977).

Figures

140. Golden Langur (Trachypithecus gee), 141. Capped Langur (Trachypithecus pileatus), 142. Shortridge’s Langur (Trachypithecus shortridgei), 143. East Javan Langur (Trachypithecus auratus), 144. West Javan Langur (Trachypithecus mauritius), 145. Silvered Langur (Trachypithecus cristatus), 146. Selangor Silvery Langur (Trachypithecus selangorensis), 147. Germain’s Langur (Trachypithecus germaini), 148. Annamese Langur (Trachypithecus margarita)

Distribution. W Peninsular Malaysia, confined to a Strip along the W coast from 6° N to 1° 30° N in the states of Kedah, Perak, Selangor, Negeri Sembilan, Melaka, and Johor.