Theria
E170447
Theria is a major subclass of mammals that includes all live-bearing species such as marsupials and placental mammals, excluding egg-laying monotremes.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Theria canonical | 49 |
| Prototheria in older classifications | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1500278 — 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: Theria Context triple: [Carnivora, subclass, Theria]
-
A.
Eutheria
Eutheria is a major clade of mammals that includes all placental mammals and their extinct relatives, characterized by prolonged gestation and complex placental development.
-
B.
Mammalia
Mammalia is the vertebrate class of warm-blooded, typically fur-bearing animals that nourish their young with milk produced by mammary glands.
-
C.
Whippomorpha
Whippomorpha is a mammalian clade that includes whales, dolphins, and hippopotamuses, uniting these seemingly disparate animals based on shared evolutionary ancestry.
-
D.
Cryptodira
Cryptodira is a major suborder of turtles characterized by their ability to retract the head straight back into the shell by bending the neck in a vertical S-shaped curve.
-
E.
Laurasiatheria
Laurasiatheria is a major clade of placental mammals that includes diverse groups such as hoofed mammals, carnivores, bats, and shrews, thought to have originated on the ancient supercontinent Laurasia.
- 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: Theria Target entity description: Theria is a major subclass of mammals that includes all live-bearing species such as marsupials and placental mammals, excluding egg-laying monotremes.
-
A.
Eutheria
Eutheria is a major clade of mammals that includes all placental mammals and their extinct relatives, characterized by prolonged gestation and complex placental development.
-
B.
Mammalia
Mammalia is the vertebrate class of warm-blooded, typically fur-bearing animals that nourish their young with milk produced by mammary glands.
-
C.
Whippomorpha
Whippomorpha is a mammalian clade that includes whales, dolphins, and hippopotamuses, uniting these seemingly disparate animals based on shared evolutionary ancestry.
-
D.
Cryptodira
Cryptodira is a major suborder of turtles characterized by their ability to retract the head straight back into the shell by bending the neck in a vertical S-shaped curve.
-
E.
Laurasiatheria
Laurasiatheria is a major clade of placental mammals that includes diverse groups such as hoofed mammals, carnivores, bats, and shrews, thought to have originated on the ancient supercontinent Laurasia.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
clade
ⓘ
mammal subclass ⓘ taxon ⓘ |
| characteristic |
live birth
ⓘ
viviparity ⓘ |
| class | Mammalia ⓘ |
| commonName | therians ⓘ |
| contains |
carnivorans
ⓘ
humans ⓘ marsupials ⓘ most living mammals ⓘ placental mammals ⓘ primates ⓘ rodents ⓘ ungulates ⓘ |
| contrastedWith |
Prototheria in older classifications
ⓘ
linked to:
Theria
|
| definedBy | live-bearing reproduction ⓘ |
| distinguishedFrom | egg-laying mammals ⓘ |
| encompasses | the vast majority of mammal species ⓘ |
| etymology | from Greek "thērion" meaning wild beast ⓘ |
| excludes |
Monotremata
ⓘ
monotremes ⓘ |
| fossilRange | Jurassic to Recent ⓘ |
| hasCharacteristic | live-born young rather than shelled eggs ⓘ |
| hasDiagnosticFeature |
absence of functional coracoid bone in shoulder girdle (relative to monotremes)
ⓘ
distinctive inner ear and jaw morphology ⓘ |
| hasExtantLineages |
Eutheria
ⓘ
Metatheria ⓘ
linked to:
Marsupialia
|
| hasLivingRepresentatives | true ⓘ |
| hasSubgroup |
Eutheria (placental mammals)
ⓘ
linked to:
Eutheria
Metatheria (marsupials and relatives) ⓘ
linked to:
Marsupialia
|
| hasTrait |
nipples in most species
ⓘ
shorter egg stage than monotremes ⓘ well-developed placenta in eutherians ⓘ |
| higherClassification | Theriiformes in some systems ⓘ |
| includes |
Eutheria
ⓘ
Metatheria ⓘ
linked to:
Marsupialia
|
| kingdom | Animalia ⓘ |
| memberOf | Synapsida ⓘ |
| phylum | Chordata ⓘ |
| recognizedBy | modern systematics ⓘ |
| reproduction | embryos develop primarily in uterus ⓘ |
| reproductiveMode | non-egg-laying ⓘ |
| sisterGroupTo | Monotremata ⓘ |
| subclassOf | Mammalia ⓘ |
| taxonRank | subclass ⓘ |
| usedIn | vertebrate taxonomy ⓘ |
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: Theria Description of subject: Theria is a major subclass of mammals that includes all live-bearing species such as marsupials and placental mammals, excluding egg-laying monotremes.
Referenced by (50)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Theria
subject linked to:
Microbiotheria (fossil eutherians sometimes historically misassigned)
subject linked to:
tribe Nannosciurini
subject linked to:
S. J. O’Brien