Thomas’s leaf monkey
E124165
Thomas’s leaf monkey is a distinctive, long-tailed colobine primate native to the forests of northern Sumatra, known for its striking facial markings and arboreal, leaf-eating lifestyle.
All labels observed (5)
| Label | Occurrences |
|---|---|
| Thomas leaf monkey | 2 |
| Presbytis thomasi | 1 |
| Thomas's langur | 1 |
| Thomas’s leaf monkey canonical | 1 |
| Trachypithecus auratus | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1071241 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Thomas’s leaf monkey Context triple: [Gunung Leuser National Park, fauna, Thomas’s leaf monkey]
-
A.
proboscis monkey
The proboscis monkey is a large, long-nosed Old World monkey native to the mangrove forests and riverine habitats of Borneo, known for its distinctive pendulous nose and strong swimming ability.
-
B.
Bornean orangutan
The Bornean orangutan is a critically endangered great ape native to the rainforests of Borneo, known for its distinctive reddish-brown fur and highly intelligent, largely solitary arboreal lifestyle.
-
C.
Bornean pygmy elephant
The Bornean pygmy elephant is a small, forest-dwelling subspecies of Asian elephant native to Borneo, known for its relatively gentle temperament, long tail, and critically threatened status due to habitat loss and human conflict.
-
D.
Rodrigues fruit bat
The Rodrigues fruit bat is a large, critically endangered flying fox species native to Rodrigues Island in the Indian Ocean, known for its vital role in pollination and seed dispersal.
-
E.
spectacled flying fox
The spectacled flying fox is a large, fruit-eating megabat native to northeastern Australia and nearby regions, recognizable by the pale rings around its eyes that give it a “spectacled” appearance.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Thomas’s leaf monkey Target entity description: Thomas’s leaf monkey is a distinctive, long-tailed colobine primate native to the forests of northern Sumatra, known for its striking facial markings and arboreal, leaf-eating lifestyle.
-
A.
proboscis monkey
The proboscis monkey is a large, long-nosed Old World monkey native to the mangrove forests and riverine habitats of Borneo, known for its distinctive pendulous nose and strong swimming ability.
-
B.
Bornean orangutan
The Bornean orangutan is a critically endangered great ape native to the rainforests of Borneo, known for its distinctive reddish-brown fur and highly intelligent, largely solitary arboreal lifestyle.
-
C.
Bornean pygmy elephant
The Bornean pygmy elephant is a small, forest-dwelling subspecies of Asian elephant native to Borneo, known for its relatively gentle temperament, long tail, and critically threatened status due to habitat loss and human conflict.
-
D.
Rodrigues fruit bat
The Rodrigues fruit bat is a large, critically endangered flying fox species native to Rodrigues Island in the Indian Ocean, known for its vital role in pollination and seed dispersal.
-
E.
spectacled flying fox
The spectacled flying fox is a large, fruit-eating megabat native to northeastern Australia and nearby regions, recognizable by the pale rings around its eyes that give it a “spectacled” appearance.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
arboreal mammal
ⓘ
colobine ⓘ species of Old World monkey ⓘ |
| activityPattern | diurnal ⓘ |
| authority | (Collett, 1893) ⓘ |
| binomialName |
Thomas’s leaf monkey
self-linksurface differs
ⓘ
surface form:
Presbytis thomasi
|
| class | Mammalia ⓘ |
| commonName |
Thomas’s leaf monkey
self-linksurface differs
ⓘ
surface form:
Thomas leaf monkey
Thomas’s leaf monkey self-linksurface differs ⓘ
surface form:
Thomas's langur
|
| conservationStatus | Near Threatened ⓘ |
| conservationStatusSystem |
IUCN Red List of Threatened Species
ⓘ
surface form:
IUCN Red List
|
| diet |
flowers
ⓘ
fruits ⓘ leaves ⓘ seeds ⓘ |
| digestiveType | foregut fermenter ⓘ |
| distinctiveFeature |
crest of hair on head
ⓘ
long tail ⓘ striking facial markings ⓘ |
| endemicTo | northern Sumatra ⓘ |
| family | Cercopithecidae ⓘ |
| genus | Presbytis ⓘ |
| geographicRange |
Aceh
ⓘ
surface form:
Aceh, Sumatra
|
| groupComposition | one-male multi-female groups ⓘ |
| habitat |
hill forest
ⓘ
montane forest ⓘ tropical rainforest ⓘ |
| kingdom | Animalia ⓘ |
| lifestyle | arboreal ⓘ |
| locomotion |
leaping
ⓘ
quadrupedal ⓘ |
| nativeTo |
Indonesia
ⓘ
Sumatra ⓘ |
| order | Primates ⓘ |
| pelageColor |
black
ⓘ
grey ⓘ white markings on face ⓘ |
| phylum | Chordata ⓘ |
| primarySubstrate | trees ⓘ |
| reproduction | viviparous ⓘ |
| socialStructure | group-living ⓘ |
| subfamily | Colobinae ⓘ |
| taxonRank | species ⓘ |
| threat |
deforestation
ⓘ
habitat loss ⓘ hunting ⓘ |
| uses | seed dispersal in forest ecosystems ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Thomas’s leaf monkey Description of subject: Thomas’s leaf monkey is a distinctive, long-tailed colobine primate native to the forests of northern Sumatra, known for its striking facial markings and arboreal, leaf-eating lifestyle.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Thomas's leaf monkey
this entity surface form:
Presbytis thomasi
subject surface form:
Thomas's leaf monkey
this entity surface form:
Thomas's langur
subject surface form:
Thomas's leaf monkey
this entity surface form:
Thomas leaf monkey
this entity surface form:
Trachypithecus auratus
this entity surface form:
Thomas leaf monkey