gastraea theory
E465967
The gastraea theory is Ernst Haeckel’s evolutionary hypothesis that all multicellular animals descended from a common, two-layered gastrula-like ancestor, helping to explain the origin of animal body plans.
All labels observed (1)
| Label | Occurrences |
|---|---|
| gastraea theory canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4770811 — 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: gastraea theory Context triple: [Generelle Morphologie der Organismen, notableConcept, gastraea theory]
-
A.
Usus antiquior
Usus antiquior is the traditional form of the Roman Rite Mass as codified after the Council of Trent and used in the Catholic Church for centuries prior to the liturgical reforms of the 20th century.
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B.
Farrer hypothesis
The Farrer hypothesis is a theory of New Testament source criticism that proposes the Gospel of Mark was written first, Matthew used Mark, and Luke used both Mark and Matthew, thereby dispensing with the need for a separate Q source.
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C.
Griesbach hypothesis
The Griesbach hypothesis is a minority theory of the Synoptic Problem that proposes Matthew was written first, Luke used Matthew, and Mark later condensed both, rejecting the need for a separate Q source.
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D.
serial endosymbiosis theory
Serial endosymbiosis theory is a scientific hypothesis proposing that key organelles of eukaryotic cells, such as mitochondria and chloroplasts, originated through successive symbiotic mergers between ancestral prokaryotic organisms.
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E.
Gaia hypothesis
The Gaia hypothesis is a scientific theory proposing that Earth’s living organisms and their inorganic surroundings interact to form a self-regulating, complex system that helps maintain conditions suitable for life.
- 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: gastraea theory Target entity description: The gastraea theory is Ernst Haeckel’s evolutionary hypothesis that all multicellular animals descended from a common, two-layered gastrula-like ancestor, helping to explain the origin of animal body plans.
-
A.
Usus antiquior
Usus antiquior is the traditional form of the Roman Rite Mass as codified after the Council of Trent and used in the Catholic Church for centuries prior to the liturgical reforms of the 20th century.
-
B.
Farrer hypothesis
The Farrer hypothesis is a theory of New Testament source criticism that proposes the Gospel of Mark was written first, Matthew used Mark, and Luke used both Mark and Matthew, thereby dispensing with the need for a separate Q source.
-
C.
Griesbach hypothesis
The Griesbach hypothesis is a minority theory of the Synoptic Problem that proposes Matthew was written first, Luke used Matthew, and Mark later condensed both, rejecting the need for a separate Q source.
-
D.
serial endosymbiosis theory
Serial endosymbiosis theory is a scientific hypothesis proposing that key organelles of eukaryotic cells, such as mitochondria and chloroplasts, originated through successive symbiotic mergers between ancestral prokaryotic organisms.
-
E.
Gaia hypothesis
The Gaia hypothesis is a scientific theory proposing that Earth’s living organisms and their inorganic surroundings interact to form a self-regulating, complex system that helps maintain conditions suitable for life.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
evolutionary hypothesis
ⓘ
theory in evolutionary biology ⓘ theory in zoology ⓘ |
| addresses |
common ancestry of multicellular animals
ⓘ
evolution of embryonic germ layers ⓘ |
| aimsToExplain |
evolutionary origin of diploblastic and triploblastic organization
ⓘ
how complex animal tissues evolved from simple layers ⓘ |
| assumes |
a single common metazoan ancestor
ⓘ
homology between gastrula stages of different animals ⓘ |
| basedOn |
comparative embryology
ⓘ
comparative morphology of animal phyla ⓘ recapitulation theory ⓘ |
| concernsStage | gastrula stage of embryonic development ⓘ |
| concernsTaxon | Animalia ⓘ |
| coreClaim |
all multicellular animals share a common ancestor resembling a gastrula
ⓘ
animal body plans originated from a simple gastrula-like form ⓘ the earliest metazoan ancestor was a two-layered organism ⓘ the metazoan ancestor possessed ectoderm and endoderm germ layers ⓘ |
| critiquedFor |
overreliance on recapitulation
ⓘ
simplified view of early metazoan evolution ⓘ |
| describes |
evolutionary transition from unicellular to multicellular animals
ⓘ
origin of Metazoa ⓘ origin of animal body plans ⓘ |
| field |
comparative morphology
ⓘ
embryology ⓘ evolutionary biology ⓘ zoology ⓘ |
| historicalContext | Darwinian evolutionary synthesis in Germany ⓘ |
| influenced |
early metazoan phylogeny models
ⓘ
historical discussions of animal origins ⓘ the study of germ layer homology ⓘ |
| languageOfOriginalFormulation | German ⓘ |
| proposedBy | Ernst Haeckel ⓘ |
| proposedInWorkBy | Ernst Haeckel’s writings on the origin of Metazoa ⓘ |
| proposesAncestor | gastraea ⓘ |
| relatedConcept |
Metazoa
ⓘ
biogenetic law ⓘ gastrula ⓘ gastrulation ⓘ germ layers ⓘ |
| status | historically important but partially superseded ⓘ |
| timeProposed |
1870s
ⓘ
19th century ⓘ |
| typeOf | common-ancestor hypothesis ⓘ |
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: gastraea theory Description of subject: The gastraea theory is Ernst Haeckel’s evolutionary hypothesis that all multicellular animals descended from a common, two-layered gastrula-like ancestor, helping to explain the origin of animal body plans.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.