NATURAL HISTORY · CATALOGUE RECORD
Southern White-cheeked Crested Gibbon
Nomascus siki (Delacour, 1951)
Source-backed taxonomic record
Accepted species in Catalogue of Life’s 11 September 2026 base release. This preserves the source classification and available supporting data; it is not a completed species monograph.
Open encyclopedia reference
The southern white-cheeked gibbon (Nomascus siki) is a species of gibbon, native to Vietnam and Laos. It is closely related to the northern white-cheeked gibbon (Nomascus leucogenys) and the yellow-cheeked gibbon (Nomascus gabriellae); it has previously been identified as a subspecies of each of these.
Wikipedia contributors, Southern white-cheeked gibbon; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T13:17:10.212457+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Nomascus siki (Delacour, 1951)
- Name authority
- (Delacour, 1951)
- Common name
- Southern White-cheeked Crested Gibbon
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Mammalia
- Order
- Primates
- Family
- Hylobatidae
- Genus
- Nomascus
- Extinction status
- Recorded extant
Classification family tree
Nested taxonomic groups from the source. This is not a direct-ancestor chain, a dated evolutionary tree or a phylogenetic reconstruction.
- domainEukaryota (Chatton, 1925) Whittaker & Margulis, 1978
- kingdomAnimalia
- phylumChordata
- subphylumVertebrata
- infraphylumGnathostomata
- parvphylumOsteichthyes
- megaclassTetrapoda
- classMammalia Linnaeus, 1758
- subclassTheria Parker & Haswell, 1897
- infraclassEutheria Gill, 1872
- orderPrimates Linnaeus, 1758
- suborderHaplorrhini Pocock, 1918
- infraorderSimiiformes Haeckel, 1866
- superfamilyHominoidea Gray, 1825
- familyHylobatidae Gray, 1871
- genusNomascus Miller, 1933
- speciesNomascus siki (Delacour, 1951)
Close classified relatives
These entries share the source’s genus, Nomascus. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Northern Yellow-cheeked Crested GibbonNomascus annamensis Thinh, Mootnick, Thanh, Nadler & Roos, 2010 | HylobatidaeChordata | Accepted speciesRecorded extant |
| Hainan Crested GibbonNomascus hainanus (Thomas, 1892) | HylobatidaeChordata | Accepted speciesRecorded extant |
| Eastern Black Crested GibbonNomascus nasutus (Kunkel d'Herculais, 1884) | HylobatidaeChordata | Accepted speciesRecorded extant |
| Black Crested GibbonNomascus concolor (Harlan, 1826) | HylobatidaeChordata | Accepted speciesRecorded extant |
| Buff-cheeked GibbonNomascus gabriellae (Thomas, 1909) | HylobatidaeChordata | Accepted speciesRecorded extant |
| Northern White-cheeked Crested GibbonNomascus leucogenys (Ogilby, 1840) | HylobatidaeChordata | Accepted speciesRecorded extant |
Documented distribution
Source distribution statements, not a complete range map. A listed locality is not necessarily a place of origin.
Source literature & publication evidence
References attached to this source record, including nomenclatural citations where supplied. This is a selected bibliography; abbreviated citations remain in the source’s form.
- https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=944291 Source fields: Taxon.tsv dwc:namePublishedIn, Taxon.tsv dcterms:references
Origins, evidence & remaining research
Name authority and publication references document nomenclature where the source supplies it. They do not establish evolutionary origins or the earliest fossil occurrence.
Specimen-level evidence, morphology, ecological research, phylogenetic studies, a comprehensive bibliography and a located literary passage have not yet been compiled for this record. A suitable sourced image remains to be added.
Dataset citation & attribution
This exact taxon in ChecklistBank · Catalogue of Life 2026-09-11
Catalogue of Life 2026-09-11; dataset 316321; doi:10.48580/dgz5n. https://creativecommons.org/licenses/by/4.0/ . Retrieved 5 October 2026.
Stable key: col:47NQR. Classification follows source parent identifiers. English common names may vary by region.