| White-thighed surili | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Primates |
| Family: | Cercopithecidae |
| Genus: | Presbytis |
| Species: | P. siamensis |
| Binomial name | |
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Presbytis siamensis (Müller & Schlegel, 1838) |
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| White-thighed surili range | |
The white-thighed surili (Presbytis siamensis) is a species of primate in the family Cercopithecidae. It is endemic to the Thai-Malay Peninsula, the Riau Archipelago and Sumatra. Four subspecies, siamensis (nominate), cana, paenulata and rhionis, are recognized here, but the taxonomy is disputed and in need of a review, and it has included P. natunae as a subspecies, or alternatively both have been considered subspecies of P. femoralis.