Fig 1
Fig 2
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Order : PRIMATES
Family : Cercopithecidae
Species : Presbytis robinsoni
Head-body length : up to 60 cm ?
Tail length : up to 76 cm ?
Weight : maximum approx. 7.5 kg ?
Presbytis robinsoni
(Robinson's Banded Langur) is a near threatened primate from north-western
Peninsular Malaysia, peninsular Thailand and peninsular Myanmar. To the
south and east of the Larut Hills, Perak, it is replaced by Presbytis
siamensis (Malayan Pale-thighed Langur).
First described in 1910 as a unique species, it was subsequently treated as
a subspecies of Presbytis
femoralis (Raffles' Banded Langur, Banded Leaf Monkey) but modern
DNA sequencing later resurrected it as a valid species (Ang et al,
2020).
This shy leaf monkey is mainly dark brown to blackish. The inner side of each limb and the lower abdomen are white, as is a
small area around the mouth. The tail is mainly black. Juveniles are
white.
It occurs in primary and secondary lowland and hill slope forest.
Ecological information about this species is somewhat limited, and thus extensive
fieldwork is required to better understand its habits and diet.
Figs 1 and 2 : Large adult (above) and smaller sub-adult (below) seen
feeding on the thin, fleshy coating of rubber seeds in a plantation at
Gua Kelam, Perlis, northern Peninsular Malaysia.
Fig 3 : Adult with juvenile; the fur of the infant has started to change from
white to black. Seen at Sungai Sedim, Kedah, northern Peninsular Malaysia.
Photo thanks to Graeme Guy.
Fig 4 : Adult feeding on seedpods of Petai (Parkia speciosa).
Seen at Sungai Sedim, Kedah, northern Peninsular Malaysia. Photo thanks to Graeme Guy.
References :
Ang, A., Roesma, D.I., Nijman, V., Meier, R., Srivathsan, A. and
Rizaldi. 2020. Faecal DNA to the rescue: Shotgun sequencing of
non-invasive samples reveals two subspecies of Southeast Asian primates
to be Critically Endangered species. Scientific Reports 10: 9396.
Links : IUCN
assessment (2021)
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