Kloss's Gibbon

Open encyclopedia reference

Kloss's gibbon (Hylobates klossii), also known as the Mentawai gibbon, the bilou or dwarf siamang, is an endangered primate in the gibbon family, Hylobatidae. It is identifiable in that it is all black, resembling the siamang with its black fur, but is considerably smaller and lacks the siamang's distinctive throat pouch. Kloss's gibbon reaches a size 17 to 25 inches (43 to 64 cm) and weigh at most 13 pounds (5.9 kg). As is the case for all gibbons, they have long arms and no tail. Males and females are difficult to distinguish.

Wikipedia contributors, Kloss's gibbon; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T03:43:22.168322+00:00. This reference remains separate from the taxonomic record.

Identity & source status

Scientific name

Hylobates klossii (Miller, 1903)

Name authority

(Miller, 1903)

Common name

Kloss's Gibbon

Rank

species

Accepted status

accepted

Kingdom

Animalia

Phylum

Chordata

Class

Mammalia

Order

Primates

Family

Hylobatidae

Genus

Hylobates

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.

1. domainEukaryota (Chatton, 1925) Whittaker & Margulis, 1978
2. kingdomAnimalia
3. phylumChordata
4. subphylumVertebrata
5. infraphylumGnathostomata
6. parvphylumOsteichthyes
7. megaclassTetrapoda
8. classMammalia Linnaeus, 1758
9. subclassTheria Parker & Haswell, 1897
10. infraclassEutheria Gill, 1872
11. orderPrimates Linnaeus, 1758
12. suborderHaplorrhini Pocock, 1918
13. infraorderSimiiformes Haeckel, 1866
14. superfamilyHominoidea Gray, 1825
15. familyHylobatidae Gray, 1871
16. genusHylobates Illiger, 1811
17. speciesHylobates klossii (Miller, 1903)

Close classified relatives

These entries share the source’s genus, Hylobates. They are not necessarily the closest relatives established by molecular evidence.

Browse 19 records assigned to Hylobatidae.

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.

1. https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=573073 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.

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:3NFRR. Classification follows source parent identifiers. English common names may vary by region.