Platysternon megacephalum megacephalum
E1037479
Platysternon megacephalum megacephalum is a subspecies of the big-headed turtle, a distinctive freshwater turtle known for its disproportionately large head and long tail, native to streams in parts of East and Southeast Asia.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Platysternon megacephalum megacephalum canonical | 1 |
| Platysternon megacephalum peguense | 1 |
| Platysternon megacephalum shiui | 1 |
| Platysternon megacephalum tristernalis | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T13286717 — 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: Platysternon megacephalum megacephalum Context triple: [Platysternidae, includesSpecies, Platysternon megacephalum megacephalum]
-
A.
Platysternidae
Platysternidae is a small family of freshwater turtles best known for the big-headed turtle (Platysternon megacephalum), a species with an unusually large head and long tail found in fast-flowing streams of Southeast Asia.
-
B.
Scleropages formosus
Scleropages formosus is a Southeast Asian freshwater fish species, commonly known as the Asian arowana, prized in the aquarium trade for its metallic scales and cultural association with luck and prosperity.
-
C.
Scleropages
Scleropages is a genus of freshwater bony-tongue fishes best known for the Asian arowanas, prized in aquariums for their elongated bodies and metallic scales.
-
D.
Speoplatyrhinus poulsoni
Speoplatyrhinus poulsoni, commonly known as the Alabama cavefish, is a rare, eyeless, and highly specialized cave-dwelling fish endemic to a single cave system in northern Alabama.
-
E.
Paradoxoglanis
Paradoxoglanis is a genus of electric catfishes known for their ability to generate electric discharges, belonging to the family Malapteruridae.
- 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: Platysternon megacephalum megacephalum Target entity description: Platysternon megacephalum megacephalum is a subspecies of the big-headed turtle, a distinctive freshwater turtle known for its disproportionately large head and long tail, native to streams in parts of East and Southeast Asia.
-
A.
Platysternidae
Platysternidae is a small family of freshwater turtles best known for the big-headed turtle (Platysternon megacephalum), a species with an unusually large head and long tail found in fast-flowing streams of Southeast Asia.
-
B.
Scleropages formosus
Scleropages formosus is a Southeast Asian freshwater fish species, commonly known as the Asian arowana, prized in the aquarium trade for its metallic scales and cultural association with luck and prosperity.
-
C.
Scleropages
Scleropages is a genus of freshwater bony-tongue fishes best known for the Asian arowanas, prized in aquariums for their elongated bodies and metallic scales.
-
D.
Speoplatyrhinus poulsoni
Speoplatyrhinus poulsoni, commonly known as the Alabama cavefish, is a rare, eyeless, and highly specialized cave-dwelling fish endemic to a single cave system in northern Alabama.
-
E.
Paradoxoglanis
Paradoxoglanis is a genus of electric catfishes known for their ability to generate electric discharges, belonging to the family Malapteruridae.
- F. None of above. chosen
Statements (33)
| Predicate | Object |
|---|---|
| instanceOf |
subspecies
ⓘ
turtle subspecies ⓘ |
| class | Reptilia ⓘ |
| commonName | big-headed turtle (nominate subspecies) ⓘ |
| conservationConcern |
threatened by habitat loss
ⓘ
threatened by overcollection for pet trade ⓘ |
| diet |
carnivorous
ⓘ
insectivorous ⓘ |
| ecologicalNiche | stream-dwelling predator ⓘ |
| family | Platysternidae NERFINISHED ⓘ |
| genus | Platysternon NERFINISHED ⓘ |
| geographicDistribution |
parts of East Asia
ⓘ
parts of Southeast Asia ⓘ |
| habitat |
freshwater streams
ⓘ
mountain streams ⓘ |
| hasBodyPart |
disproportionately large head
ⓘ
long tail ⓘ |
| hasShellType | hard-shelled ⓘ |
| kingdom | Animalia ⓘ |
| lifestyle |
freshwater
ⓘ
primarily nocturnal ⓘ |
| locomotion |
aquatic
ⓘ
climbing ⓘ |
| nativeTo |
East Asia
ⓘ
Southeast Asia ⓘ |
| notableFeature |
elongated tail
ⓘ
strong jaws ⓘ very large head relative to body size ⓘ |
| order | Testudines ⓘ |
| parentTaxon | Platysternon megacephalum ⓘ |
| phylum | Chordata ⓘ |
| reproduction | oviparous ⓘ |
| taxonRank | subspecies ⓘ |
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: Platysternon megacephalum megacephalum Description of subject: Platysternon megacephalum megacephalum is a subspecies of the big-headed turtle, a distinctive freshwater turtle known for its disproportionately large head and long tail, native to streams in parts of East and Southeast Asia.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Platysternon megacephalum tristernalis
this entity surface form:
Platysternon megacephalum peguense
this entity surface form:
Platysternon megacephalum shiui