Ichthyosauria
E673037
Ichthyosauria is an extinct group of marine reptiles that resembled dolphins and thrived in the world’s oceans during the Mesozoic Era.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Ichthyosauria canonical | 2 |
| Ichthyosaurus | 1 |
| Ophthalmosauridae | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7577339 — 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: Ichthyosauria Context triple: [Diapsida, includesTaxon, Ichthyosauria]
-
A.
Champsosaurus
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.
-
B.
Osteostraci
Osteostraci is an extinct group of armored, jawless vertebrates known from the Silurian and Devonian periods, notable for their bony head shields and importance in early vertebrate evolution.
-
C.
Mesosaurus
Mesosaurus was an early Permian aquatic reptile whose fossils in both South America and Africa provided key evidence for continental drift and the former supercontinent Gondwana.
-
D.
Thelodonti
Thelodonti are an extinct group of small, jawless vertebrates characterized by distinctive scale-covered bodies, known primarily from Silurian and Devonian marine deposits.
-
E.
Placodermi
Placodermi is an extinct class of armored prehistoric fishes that were among the earliest jawed vertebrates.
- 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: Ichthyosauria Target entity description: Ichthyosauria is an extinct group of marine reptiles that resembled dolphins and thrived in the world’s oceans during the Mesozoic Era.
-
A.
Champsosaurus
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.
-
B.
Osteostraci
Osteostraci is an extinct group of armored, jawless vertebrates known from the Silurian and Devonian periods, notable for their bony head shields and importance in early vertebrate evolution.
-
C.
Mesosaurus
Mesosaurus was an early Permian aquatic reptile whose fossils in both South America and Africa provided key evidence for continental drift and the former supercontinent Gondwana.
-
D.
Thelodonti
Thelodonti are an extinct group of small, jawless vertebrates characterized by distinctive scale-covered bodies, known primarily from Silurian and Devonian marine deposits.
-
E.
Placodermi
Placodermi is an extinct class of armored prehistoric fishes that were among the earliest jawed vertebrates.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
clade
ⓘ
extinct taxon ⓘ marine reptile group ⓘ |
| adaptation | secondary adaptation to marine life ⓘ |
| ate |
cephalopods
ⓘ
fish ⓘ |
| bodyShape |
fusiform
ⓘ
streamlined ⓘ |
| class | Reptilia ⓘ |
| diet | carnivorous ⓘ |
| discoveredIn | 19th century ⓘ |
| ecologicalRole |
apex marine predator
ⓘ
mesopredator ⓘ |
| etymologyLanguage | Greek ⓘ |
| extinctionStatus | extinct ⓘ |
| firstAppearance |
Early Triassic
ⓘ
linked to:
Lower Triassic
|
| fossilRecord | abundant ⓘ |
| fossilType |
pregnant females with embryos
ⓘ
skeletons ⓘ |
| geologicalPeriod | Mesozoic Era ⓘ |
| hasAnatomicalFeature |
dorsal fin
ⓘ
elongated snout ⓘ hypocercal tail fin ⓘ large eyes ⓘ paddle-like limbs ⓘ |
| hasSubgroup |
Ichthyosauridae
ⓘ
Mixosauridae ⓘ Ophthalmosauridae ⓘ
linked to:
Ichthyosauria
Shastasauridae ⓘ |
| infraclass |
Lepidosauromorpha
ⓘ
linked to:
Lepidosauria
|
| kingdom | Animalia ⓘ |
| lastAppearance | Late Cretaceous ⓘ |
| livedIn |
marine environment
ⓘ
ocean ⓘ |
| locomotion |
aquatic locomotion
ⓘ
tail-powered swimming ⓘ |
| nameMeaning | fish lizards ⓘ |
| notableFossilSite |
Holzmaden, Germany
ⓘ
Lyme Regis, England ⓘ
linked to:
Lyme Regis
Nevada, United States ⓘ
linked to:
Nevada
|
| phylum | Chordata ⓘ |
| reproduction | viviparous ⓘ |
| resembles |
dolphin
ⓘ
fish ⓘ |
| respiration | air-breathing ⓘ |
| sensoryAdaptation | large sclerotic rings in eyes ⓘ |
| subclass | Diapsida ⓘ |
| taxonRank | order ⓘ |
| temporalRange | approximately 250 million years ago to 90 million years ago ⓘ |
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: Ichthyosauria Description of subject: Ichthyosauria is an extinct group of marine reptiles that resembled dolphins and thrived in the world’s oceans during the Mesozoic Era.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Ichthyosauria
linked to: Ichthyosauria