Champsosaurus
E364214
Champsosaurus was a long-snouted, semi-aquatic reptile from the Late Cretaceous and early Paleogene that resembled a modern gharial and belonged to the extinct group Choristodera.
All labels observed (6)
| Label | Occurrences |
|---|---|
| Champsosaurus canonical | 2 |
| Champsosaurus natator | 2 |
| Champsosauridae | 1 |
| Champsosaurus gigas | 1 |
| Champsosaurus laramiensis | 1 |
| Champsosaurus lindoei | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3502412 — 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: Champsosaurus Context triple: [Hell Creek Formation, containsFossil, Champsosaurus]
-
A.
Erpetoichthys
Erpetoichthys is a genus of elongated, eel-like bichir fishes native to African freshwater habitats, best known for the ropefish (Erpetoichthys calabaricus).
-
B.
Othnielosaurus
Othnielosaurus is a small, bipedal ornithischian dinosaur from the Late Jurassic of North America, known for its lightly built body and herbivorous diet.
-
C.
Spinosaurus
Spinosaurus is a large, sail-backed theropod dinosaur, popularly depicted as a fearsome aquatic predator in the Jurassic Park franchise.
-
D.
Kimberella
Kimberella is an extinct, soft-bodied marine organism from the late Precambrian Ediacaran period, often considered one of the earliest known animals with possible mollusc-like features.
-
E.
Cetancodonta
Cetancodonta is a mammalian clade that unites whales, dolphins, and porpoises with their closest living terrestrial relatives, the hippopotamuses.
- 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: Champsosaurus Target entity description: Champsosaurus was a long-snouted, semi-aquatic reptile from the Late Cretaceous and early Paleogene that resembled a modern gharial and belonged to the extinct group Choristodera.
-
A.
Erpetoichthys
Erpetoichthys is a genus of elongated, eel-like bichir fishes native to African freshwater habitats, best known for the ropefish (Erpetoichthys calabaricus).
-
B.
Othnielosaurus
Othnielosaurus is a small, bipedal ornithischian dinosaur from the Late Jurassic of North America, known for its lightly built body and herbivorous diet.
-
C.
Spinosaurus
Spinosaurus is a large, sail-backed theropod dinosaur, popularly depicted as a fearsome aquatic predator in the Jurassic Park franchise.
-
D.
Kimberella
Kimberella is an extinct, soft-bodied marine organism from the late Precambrian Ediacaran period, often considered one of the earliest known animals with possible mollusc-like features.
-
E.
Cetancodonta
Cetancodonta is a mammalian clade that unites whales, dolphins, and porpoises with their closest living terrestrial relatives, the hippopotamuses.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
choristodere
ⓘ
extinct reptile genus ⓘ |
| bodyLength | up to about 3 meters ⓘ |
| class | Reptilia ⓘ |
| describedBy | Edward Drinker Cope ⓘ |
| describedInYear | 1876 ⓘ |
| diet | piscivorous ⓘ |
| ecologicalRole | aquatic predator ⓘ |
| extinctionStatus | extinct ⓘ |
| eyePlacement | dorsally positioned eyes ⓘ |
| family |
Champsosaurus
self-linksurface differs
ⓘ
surface form:
Champsosauridae
|
| feedingHabits | fish-eating ⓘ |
| fossilsFoundIn |
Canada
ⓘ
France ⓘ United Kingdom ⓘ United States of America ⓘ
surface form:
United States
|
| foundIn |
Europe
ⓘ
North America ⓘ |
| geologicalFormation |
Hell Creek Formation
ⓘ
Lance Formation ⓘ |
| habitat | freshwater rivers and lakes ⓘ |
| jawAdaptation | adapted for rapid sideways snapping ⓘ |
| kingdom | Animalia ⓘ |
| lifestyle | semi-aquatic ⓘ |
| livedDuring |
Early Eocene
ⓘ
Maastrichtian ⓘ Paleocene ⓘ |
| locomotion | swimming with tail propulsion ⓘ |
| nameEtymology | derived from Greek for "crocodile lizard" ⓘ |
| nostrilPlacement | terminal or near-terminal nares on snout ⓘ |
| notableSpecies |
Champsosaurus
self-linksurface differs
ⓘ
surface form:
Champsosaurus gigas
Champsosaurus self-linksurface differs ⓘ
surface form:
Champsosaurus laramiensis
Champsosaurus self-linksurface differs ⓘ
surface form:
Champsosaurus lindoei
Champsosaurus self-linksurface differs ⓘ
surface form:
Champsosaurus natator
|
| order | Choristodera ⓘ |
| phylum | Chordata ⓘ |
| reproductiveBiology | likely oviparous ⓘ |
| resembles | gharial ⓘ |
| scientificName | Champsosaurus self-link ⓘ |
| skeletonPreservation | often known from skulls and vertebrae ⓘ |
| skullMorphology | elongate narrow skull ⓘ |
| snoutShape | long and narrow ⓘ |
| survivedEvent |
Cretaceous–Paleogene boundary
ⓘ
surface form:
Cretaceous–Paleogene extinction event
|
| tailMorphology | laterally compressed tail ⓘ |
| taxonRank | genus ⓘ |
| temporalRangeEnd | Paleogene ⓘ |
| temporalRangeStart | Late Cretaceous ⓘ |
| toothType | numerous small conical teeth ⓘ |
| typeSpecies |
Champsosaurus
self-linksurface differs
ⓘ
surface form:
Champsosaurus natator
|
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: Champsosaurus Description of subject: Champsosaurus was a long-snouted, semi-aquatic reptile from the Late Cretaceous and early Paleogene that resembled a modern gharial and belonged to the extinct group Choristodera.
Referenced by (8)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Champsosauridae
this entity surface form:
Champsosaurus natator
this entity surface form:
Champsosaurus natator
this entity surface form:
Champsosaurus laramiensis
this entity surface form:
Champsosaurus gigas
this entity surface form:
Champsosaurus lindoei