Ornithomimus
E376621
Ornithomimus was a fast, ostrich-like theropod dinosaur known for its long legs, toothless beak, and likely omnivorous diet during the Late Cretaceous period.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Ornithomimidae | 1 |
| Ornithomimosauria | 1 |
| Ornithomimus canonical | 1 |
| Struthiomimus | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3502404 — 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: Ornithomimus Context triple: [Hell Creek Formation, containsFossil, Ornithomimus]
-
A.
Troodon
Troodon was a small, bird-like, highly intelligent theropod dinosaur known for its large eyes, grasping hands, and serrated teeth, which suggest an active, possibly omnivorous lifestyle.
-
B.
Compsognathus
Compsognathus was a small, bipedal carnivorous dinosaur from the Late Jurassic period, known for its slender build and for being one of the first dinosaurs reconstructed from nearly complete skeletons.
-
C.
Coelophysis
Coelophysis was a small, lightly built, carnivorous dinosaur from the Late Triassic period, known for being one of the earliest well-documented theropods.
-
D.
Dryosaurus
Dryosaurus was a small, fast, plant-eating ornithopod dinosaur from the Late Jurassic period, known for its long legs and lightweight build.
-
E.
Thescelosaurus neglectus
Thescelosaurus neglectus is a small, herbivorous ornithischian dinosaur from the Late Cretaceous of North America, known for its robust limbs and association with some of the last dinosaur faunas before the mass extinction.
- 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: Ornithomimus Target entity description: Ornithomimus was a fast, ostrich-like theropod dinosaur known for its long legs, toothless beak, and likely omnivorous diet during the Late Cretaceous period.
-
A.
Troodon
Troodon was a small, bird-like, highly intelligent theropod dinosaur known for its large eyes, grasping hands, and serrated teeth, which suggest an active, possibly omnivorous lifestyle.
-
B.
Compsognathus
Compsognathus was a small, bipedal carnivorous dinosaur from the Late Jurassic period, known for its slender build and for being one of the first dinosaurs reconstructed from nearly complete skeletons.
-
C.
Coelophysis
Coelophysis was a small, lightly built, carnivorous dinosaur from the Late Triassic period, known for being one of the earliest well-documented theropods.
-
D.
Dryosaurus
Dryosaurus was a small, fast, plant-eating ornithopod dinosaur from the Late Jurassic period, known for its long legs and lightweight build.
-
E.
Thescelosaurus neglectus
Thescelosaurus neglectus is a small, herbivorous ornithischian dinosaur from the Late Cretaceous of North America, known for its robust limbs and association with some of the last dinosaur faunas before the mass extinction.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
coelurosaur
ⓘ
ornithomimid ⓘ theropod dinosaur ⓘ |
| beakType | keratinous toothless beak ⓘ |
| bodyPlanComparedTo | ostrich ⓘ |
| clade |
Coelurosauria
ⓘ
Dinosauria ⓘ Theropoda ⓘ |
| coexistedWith |
Triceratops
ⓘ
Tyrannosaurus ⓘ
surface form:
Tyrannosaurus rex
|
| diet | omnivorous ⓘ |
| ecologicalRole | medium-sized omnivore ⓘ |
| estimatedLength | 3.5 m ⓘ |
| estimatedMass | 150 kg ⓘ |
| family |
Ornithomimus
self-linksurface differs
ⓘ
surface form:
Ornithomimidae
|
| forelimbFeature |
long arms
ⓘ
three-fingered hands ⓘ |
| fossilType |
isolated bones
ⓘ
partial skeletons ⓘ skeletons ⓘ |
| likelyBehavior |
active forager
ⓘ
fast runner ⓘ |
| livedIn |
Alberta
ⓘ
Canada ⓘ Montana ⓘ New Mexico ⓘ North America ⓘ South Dakota ⓘ United States of America ⓘ
surface form:
United States
|
| locomotion | bipedal ⓘ |
| meaningOfName | bird mimic ⓘ |
| namedBy | Othniel Charles Marsh ⓘ |
| notableFeature |
long legs
ⓘ
long neck ⓘ long tail ⓘ small head ⓘ toothless beak ⓘ |
| period | Late Cretaceous ⓘ |
| possibleDiet |
fruits
ⓘ
insects ⓘ plants ⓘ small vertebrates ⓘ |
| reproduction | oviparous ⓘ |
| tailFunction | balance during running ⓘ |
| taxonRank | genus ⓘ |
| thermoregulation | likely warm-blooded ⓘ |
| timeSpan |
Campanian
ⓘ
Maastrichtian ⓘ |
| yearDescribed | 1890 ⓘ |
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: Ornithomimus Description of subject: Ornithomimus was a fast, ostrich-like theropod dinosaur known for its long legs, toothless beak, and likely omnivorous diet during the Late Cretaceous period.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Struthiomimus
this entity surface form:
Ornithomimosauria
this entity surface form:
Ornithomimidae