Eomaia
E193069
Eomaia is an early Cretaceous mammal considered one of the oldest known eutherians, providing key insights into the early evolution of placental mammals.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Eomaia canonical | 1 |
| Eomaia scansoria | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1742328 — 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: Eomaia Context triple: [Eutheria, earliestFossils, Eomaia]
-
A.
Zygomaturus
Zygomaturus is an extinct genus of large, herbivorous Australian marsupials related to wombats and diprotodontids that lived during the Pleistocene.
-
B.
Critobulus
Critobulus was an ancient Athenian known from Plato’s dialogues as the son of Crito and an associate of Socrates.
-
C.
Hesperethusa
Hesperethusa is a genus of flowering plants in the citrus family Rutaceae, known for species such as Hesperethusa crenulata (also called Limonia crenulata) that are native to South and Southeast Asia.
-
D.
Enosichthon
Enosichthon is an epithet of the Greek god Poseidon that emphasizes his power as the earth-shaker and bringer of earthquakes.
-
E.
Oreortyx
Oreortyx is a small genus of New World quails best known for the mountain quail, a ground-dwelling game bird native to western North America.
- 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: Eomaia Target entity description: Eomaia is an early Cretaceous mammal considered one of the oldest known eutherians, providing key insights into the early evolution of placental mammals.
-
A.
Zygomaturus
Zygomaturus is an extinct genus of large, herbivorous Australian marsupials related to wombats and diprotodontids that lived during the Pleistocene.
-
B.
Critobulus
Critobulus was an ancient Athenian known from Plato’s dialogues as the son of Crito and an associate of Socrates.
-
C.
Hesperethusa
Hesperethusa is a genus of flowering plants in the citrus family Rutaceae, known for species such as Hesperethusa crenulata (also called Limonia crenulata) that are native to South and Southeast Asia.
-
D.
Enosichthon
Enosichthon is an epithet of the Greek god Poseidon that emphasizes his power as the earth-shaker and bringer of earthquakes.
-
E.
Oreortyx
Oreortyx is a small genus of New World quails best known for the mountain quail, a ground-dwelling game bird native to western North America.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
early eutherian mammal
ⓘ
extinct mammal genus ⓘ fossil taxon ⓘ species ⓘ |
| ageInMillionsOfYears | approximately 125 million years ago ⓘ |
| bodyLength | approximately 10 centimeters ⓘ |
| clade | Eutheria ⓘ |
| class | Mammalia ⓘ |
| coexistedWith |
early birds of the Jehol Biota
ⓘ
feathered dinosaurs of the Jehol Biota ⓘ |
| country | China ⓘ |
| dentitionType | tribosphenic molars ⓘ |
| describedBy |
John R. Wible
NERFINISHED
ⓘ
Qiang Ji ⓘ Zhe-Xi Luo ⓘ |
| describedInPublication | Nature ⓘ |
| describedInYear | 2002 ⓘ |
| diet | insectivorous ⓘ |
| differsFromMetatheriansBy | absence of epipubic bones ⓘ |
| estimatedMass | approximately 20–25 grams ⓘ |
| formation | Yixian Formation ⓘ |
| fossilDiscoveryYear | 2002 ⓘ |
| fossilPreservation | exceptionally complete skeleton ⓘ |
| fossilSite |
Liaoning
ⓘ
surface form:
Liaoning Province
Yixian Formation ⓘ |
| geologicalAge |
Early Cretaceous
ⓘ
surface form:
Barremian–Aptian
|
| importantFor |
early evolution of eutherian mammals
ⓘ
origin of placental mammals ⓘ |
| kingdom | Animalia ⓘ |
| limbAdaptation | grasping feet ⓘ |
| locomotion |
arboreal
ⓘ
scansorial ⓘ |
| notableFeature |
key transitional form in mammalian evolution
ⓘ
one of the oldest known eutherian mammals ⓘ |
| paleoenvironment | lacustrine volcanic setting ⓘ |
| pelvicStructure | wide pelvic opening ⓘ |
| pelvicStructureSignificance | suggests birth of relatively developed young ⓘ |
| phylum | Chordata ⓘ |
| preserves | impressions of fur ⓘ |
| providesEvidenceFor | early divergence of eutherians from other mammals ⓘ |
| region | northeastern China ⓘ |
| reproductiveBiologyInference |
eutherian-like reproductive traits
ⓘ
longer gestation than metatherians ⓘ |
| sharesWithEutherians | ankle and dental characteristics ⓘ |
| tail | long tail ⓘ |
| taxonRank | genus ⓘ |
| temporalRange | Early Cretaceous ⓘ |
| typeSpecies |
Eomaia
self-linksurface differs
ⓘ
surface form:
Eomaia scansoria
|
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: Eomaia Description of subject: Eomaia is an early Cretaceous mammal considered one of the oldest known eutherians, providing key insights into the early evolution of placental mammals.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Eomaia scansoria