White-thighed Surili
Encyclopedia
The white-thighed surili (Presbytis siamensis) is a species of primate
in the Cercopithecidae family. 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
.
Primate
A primate is a mammal of the order Primates , which contains prosimians and simians. Primates arose from ancestors that lived in the trees of tropical forests; many primate characteristics represent adaptations to life in this challenging three-dimensional environment...
in the Cercopithecidae family. It is endemic to the Thai-Malay Peninsula, the Riau Archipelago
Riau Archipelago
Not to be confused with Riau Islands Province, a province of Indonesia.The Riau Archipelago is the core group of islands within the Riau Islands Province in Indonesia, and located south of Singapore...
and Sumatra
Sumatra
Sumatra is an island in western Indonesia, westernmost of the Sunda Islands. It is the largest island entirely in Indonesia , and the sixth largest island in the world at 473,481 km2 with a population of 50,365,538...
. Four subspecies
Subspecies
Subspecies in biological classification, is either a taxonomic rank subordinate to species, ora taxonomic unit in that rank . A subspecies cannot be recognized in isolation: a species will either be recognized as having no subspecies at all or two or more, never just one...
, siamensis (nominate), cana, paenulata and rhionis, are recognized here, but the taxonomy
Taxonomy
Taxonomy is the science of identifying and naming species, and arranging them into a classification. The field of taxonomy, sometimes referred to as "biological taxonomy", revolves around the description and use of taxonomic units, known as taxa...
is disputed and in need of a review, and it has included P. natunae
Natuna Island Surili
The Natuna Island surili is a species of primate in the Cercopithecidae family. It is endemic to the Indonesian island of Natuna Besar. It was separated from P. siamensis by Groves in 2001....
as a subspecies, or alternatively both have been considered subspecies of P. femoralis
Banded Surili
The banded surili is a species of primate in the Cercopithecidae family. It is endemic to the Thai-Malay Peninsula and the Indonesia island of Sumatra. It is threatened by habitat loss. Three subspecies, femoralis , robinsoni and percura, are recognized here, but the taxonomy is complex and...
.