Megalonema
E805707
Megalonema is a genus of freshwater catfish native to South American river systems, belonging to the family Pimelodidae.
All labels observed (7)
| Label | Occurrences |
|---|---|
| Megalonema platycephalum | 2 |
| Megalonema canonical | 1 |
| Megalonema amaxanthum | 1 |
| Megalonema pauciradiatum | 1 |
| Megalonema psammium | 1 |
| Megalonema vertebrale | 1 |
| Megalonema xanthum | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9541532 — 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: Megalonema Context triple: [Pimelodidae, includes, Megalonema]
-
A.
Ancylostoma
Ancylostoma is a genus of parasitic hookworms that infect the intestines of mammals, including humans, often causing anemia and other gastrointestinal symptoms.
-
B.
Necator
Necator is a genus of parasitic hookworms that infect the small intestines of humans and other mammals, commonly causing anemia and other health issues.
-
C.
Ancylostoma duodenale
Ancylostoma duodenale is a parasitic hookworm species that infects the human small intestine, causing iron-deficiency anemia and other gastrointestinal symptoms.
-
D.
Brugia timori
Brugia timori is a parasitic filarial nematode that infects humans and causes timorian filariasis, a form of lymphatic filariasis found primarily in parts of Indonesia.
-
E.
Dracunculus medinensis
Dracunculus medinensis is a parasitic nematode that causes Guinea worm disease, a debilitating infection historically transmitted through contaminated drinking water.
- 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: Megalonema Target entity description: Megalonema is a genus of freshwater catfish native to South American river systems, belonging to the family Pimelodidae.
-
A.
Ancylostoma
Ancylostoma is a genus of parasitic hookworms that infect the intestines of mammals, including humans, often causing anemia and other gastrointestinal symptoms.
-
B.
Necator
Necator is a genus of parasitic hookworms that infect the small intestines of humans and other mammals, commonly causing anemia and other health issues.
-
C.
Ancylostoma duodenale
Ancylostoma duodenale is a parasitic hookworm species that infects the human small intestine, causing iron-deficiency anemia and other gastrointestinal symptoms.
-
D.
Brugia timori
Brugia timori is a parasitic filarial nematode that infects humans and causes timorian filariasis, a form of lymphatic filariasis found primarily in parts of Indonesia.
-
E.
Dracunculus medinensis
Dracunculus medinensis is a parasitic nematode that causes Guinea worm disease, a debilitating infection historically transmitted through contaminated drinking water.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
genus
ⓘ
taxon ⓘ |
| belongsTo |
Neotropical ichthyofauna
ⓘ
Pimelodidae genera ⓘ |
| bodyShape | moderately depressed head with cylindrical body ⓘ |
| characteristic |
elongated body
ⓘ
long barbels ⓘ well-developed adipose fin ⓘ |
| class | Actinopterygii ⓘ |
| coloration | generally brownish or grayish with mottling ⓘ |
| commonName | megalonema catfishes ⓘ |
| describedAs | South American pimelodid catfish genus ⓘ |
| distribution | tropical South America ⓘ |
| domain |
Eukaryota
ⓘ
linked to:
Eukarya
|
| ecologicalRole | mid-level predator in riverine ecosystems ⓘ |
| environment | benthic ⓘ |
| family | Pimelodidae ⓘ |
| feedingHabit | benthic invertebrate predator ⓘ |
| finType | strong pectoral fin spines ⓘ |
| foundIn |
deep river channels
ⓘ
large rivers ⓘ main river channels ⓘ |
| habitat | freshwater ⓘ |
| hasGillOpening | wide ⓘ |
| hasSpecies |
Megalonema amaxanthum
ⓘ
linked to:
Megalonema
Megalonema pauciradiatum ⓘ
linked to:
Megalonema
Megalonema platycephalum ⓘ
linked to:
Megalonema
Megalonema psammium ⓘ
linked to:
Megalonema
Megalonema vertebrale ⓘ
linked to:
Megalonema
Megalonema xanthum ⓘ
linked to:
Megalonema
|
| kingdom | Animalia ⓘ |
| lifestyle | demersal ⓘ |
| locomotion | swimming near river bottom ⓘ |
| nativeTo |
Amazon River basin
ⓘ
linked to:
Amazon Basin
Orinoco River basin ⓘ
linked to:
Orinoco Basin
South America ⓘ other tropical South American river systems ⓘ |
| order | Siluriformes ⓘ |
| phylum | Chordata ⓘ |
| reproduction | oviparous ⓘ |
| scientificNameAuthorship | established in 19th century ichthyological literature ⓘ |
| sensoryAdaptation | well-developed barbels for substrate detection ⓘ |
| taxonRank | genus ⓘ |
| trophicLevel | carnivorous ⓘ |
| typeSpecies |
Megalonema platycephalum
ⓘ
linked to:
Megalonema
|
| waterType | tropical freshwater ⓘ |
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: Megalonema Description of subject: Megalonema is a genus of freshwater catfish native to South American river systems, belonging to the family Pimelodidae.
Referenced by (8)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Megalonema
linked to: Megalonema
linked to: Megalonema
linked to: Megalonema
linked to: Megalonema
linked to: Megalonema
linked to: Megalonema