Javan Lutung

Javan Lutung

Taxobox
name = Javan LutungMSW3 Groves|pages=175]


image_width = 225px
status = VU
trend = unknown
status_system = iucn3.1
status_ref = [IUCN2006|assessors=Eudey "et al"|year=2000|id=22034|title=Trachypithecus auratus|downloaded=11 May 2006 Listed as Vulnerable (VU B1+2ab v2.3) ]
regnum = Animalia
phylum = Chordata
classis = Mammalia
ordo = Primates
familia = Cercopithecidae
genus = "Trachypithecus"
species_group = "T. cristatus"
species = "T. auratus"
binomial = "Trachypithecus auratus"
binomial_authority = É. Geoffroy, 1812
The Javan Lutung, "Trachypithecus auratus" also known as the Ebony Lutung and Javan Langur, is an Old World monkey from the Colobinae subfamily. It is most commonly glossy black with a brownish tinge to its legs, sides, and "sideburns".cite web|title=Primate Fact Sheets|accessdate=January 2004|date=October 15, 2003|url=http://members.tripod.com/uakari/trachypithecus_auratus.html] It is found on and endemic to the island of Java, as well as on several of the surrounding Indonesian islands. The Latin word "auratus" in its scientific name means "golden", and refers to a less common color variant. Note that the common name Golden Langur is used for a different species.

Like all langurs, this species' tail is noticeably long, measuring up to 87 cm in length while the body is only around 55 cm long.cite book|last=Macdonald|first=D.|year=2001|title=The New Encyclopedia of Mammals|publisher=Oxford University Press|location=Oxford] The two subspecies of this lutung are fairly similar in appearance and are geographically separated; males and females are both usually glossy black, although the females pale, yellowish white patch around the pubic area. Juveniles of both subspecies are orange in color.cite book|last=Rowe|first=N.|year=1996|title=The Pictorial Guide to the living Primates|publisher=Pogonias Press|location=East Hampton, New York] The nominate subspecies "Trachypithecus auratus auratus" has a rare race that does not lose its juvenile coloration when it matures, instead the coloration darkens slightly, with yellow tinges on its sides, limbs, and around its ears, and a black tinge on its back.

The Javan Lutung inhabits the interior and peripheral areas of rainforests.

This primate is diurnal and arboreal. Its diet is primarily herbivorous, eating leaves, fruit, flowers, and flower buds, although it also eats insect larvae. As with other colobines, it has evolved a specialised stomach to digest plant material more efficiently. This species also has enlarged salivary glands to assist it in breaking down food.

Like other langurs, the Javan Lutung is a social animal, living in groups of around seven individuals, with one or two adult males in the group. Although they will look after offspring of other mothers as well as their own, adult females are aggressive towards females from other groups. The brighter coloring of juveniles may alert females to their presence and ensures that they will always be noticed and protected. This species has no discernible mating season and females produce one offspring at a time.

Subspecies:
* Spangled Ebony or Eastern Javan Lutung, "Trachypithecus auratus auratus"
* Western Javan Lutung, "Trachypithecus auratus mauritius

Gallery

References


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