Ornithischia
E366857
Ornithischia is a major clade of primarily herbivorous, bird-hipped dinosaurs that includes groups such as stegosaurs, ankylosaurs, and ceratopsians.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Ornithischia canonical | 14 |
| Neornithischia | 4 |
| Thyreophora | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T3502286 — 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: Ornithischia Context triple: [Theropoda, relatedTo, Ornithischia]
-
A.
Dinosauria
Dinosauria is a diverse clade of reptiles that originated in the Mesozoic Era and includes both extinct non-avian dinosaurs and modern birds.
-
B.
Saurischia
Saurischia is one of the two major dinosaur clades, characterized by a lizard-hipped pelvic structure and including both theropods (ancestors of birds) and sauropodomorphs.
-
C.
Archosauria
Archosauria is a major group of diapsid reptiles that includes all living birds and crocodilians, as well as their extinct dinosaur and pterosaur relatives.
-
D.
Theropoda
Theropoda is a major group of mostly bipedal, primarily carnivorous dinosaurs that includes famous species like Tyrannosaurus rex and the ancestors of modern birds.
-
E.
Titanosauria
Titanosauria is a diverse clade of large, long-necked sauropod dinosaurs that includes some of the heaviest and most massive land animals known from the fossil record.
- 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: Ornithischia Target entity description: Ornithischia is a major clade of primarily herbivorous, bird-hipped dinosaurs that includes groups such as stegosaurs, ankylosaurs, and ceratopsians.
-
A.
Dinosauria
Dinosauria is a diverse clade of reptiles that originated in the Mesozoic Era and includes both extinct non-avian dinosaurs and modern birds.
-
B.
Saurischia
Saurischia is one of the two major dinosaur clades, characterized by a lizard-hipped pelvic structure and including both theropods (ancestors of birds) and sauropodomorphs.
-
C.
Archosauria
Archosauria is a major group of diapsid reptiles that includes all living birds and crocodilians, as well as their extinct dinosaur and pterosaur relatives.
-
D.
Theropoda
Theropoda is a major group of mostly bipedal, primarily carnivorous dinosaurs that includes famous species like Tyrannosaurus rex and the ancestors of modern birds.
-
E.
Titanosauria
Titanosauria is a diverse clade of large, long-necked sauropod dinosaurs that includes some of the heaviest and most massive land animals known from the fossil record.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
dinosaur clade
ⓘ
taxonomic group ⓘ |
| characteristicTrait |
beak-like rhamphotheca in many taxa
ⓘ
bipedal or quadrupedal posture ⓘ cheek-like structures for food retention (inferred) ⓘ leaf-shaped cheek teeth adapted for grinding plants ⓘ ossified tendons along vertebrae in many forms ⓘ predentary bone in lower jaw ⓘ |
| class | Reptilia ⓘ |
| containsGroup |
Ankylosauria
ⓘ
linked to:
Nodosauridae
Cerapoda ⓘ Ceratopsia ⓘ Heterodontosauridae ⓘ Marginocephalia ⓘ
linked to:
Ceratopsidae
Neornithischia ⓘ
linked to:
Ornithischia
Ornithopoda ⓘ Pachycephalosauria ⓘ
linked to:
Pachycephalosaurus wyomingensis
Stegosauria ⓘ Thyreophora ⓘ
linked to:
Ornithischia
|
| diet | primarily herbivorous ⓘ |
| distinguishedFrom | Saurischia by pelvis morphology ⓘ |
| ecologicalRole | primary herbivores in Mesozoic ecosystems ⓘ |
| etymology | derived from Greek for "bird-hipped" ⓘ |
| extinctionEvent |
Cretaceous–Paleogene extinction event
ⓘ
linked to:
Cretaceous–Paleogene boundary
|
| fossilDistribution | global ⓘ |
| higherGroup | Avemetatarsalia ⓘ |
| hipStructure | bird-like pelvis ⓘ |
| includesFamousTaxon |
Ankylosaurus
ⓘ
Iguanodon ⓘ Pachycephalosaurus ⓘ
linked to:
Pachycephalosaurus wyomingensis
Parasaurolophus ⓘ Stegosaurus ⓘ Triceratops ⓘ |
| kingdom | Animalia ⓘ |
| locomotion |
bipedal in early forms
ⓘ
facultatively quadrupedal in many ornithopods ⓘ obligately quadrupedal in many thyreophorans ⓘ |
| namedBy | Harry Govier Seeley ⓘ |
| phylum | Chordata ⓘ |
| pubisOrientation | backward-pointing pubis ⓘ |
| reproduction | oviparous ⓘ |
| sisterGroup | Saurischia ⓘ |
| subclass | Ornithodira ⓘ |
| superorder | Dinosauria ⓘ |
| taxonomicRank | clade ⓘ |
| temporalRange |
Cretaceous
ⓘ
Jurassic ⓘ Late Triassic ⓘ |
| yearDescribed | 1887 ⓘ |
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: Ornithischia Description of subject: Ornithischia is a major clade of primarily herbivorous, bird-hipped dinosaurs that includes groups such as stegosaurs, ankylosaurs, and ceratopsians.
Referenced by (22)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Ornithischia
linked to: Ornithischia
linked to: Ornithischia
linked to: Ornithischia
linked to: Ornithischia
linked to: Ornithischia
linked to: Ornithischia
linked to: Ornithischia