Early Devonian
E27677
The Early Devonian was the initial subdivision of the Devonian Period, marked by the diversification of early fishes and the spread of primitive vascular land plants across emerging terrestrial ecosystems.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Early Devonian canonical | 3 |
| Early Devonian Period | 1 |
| Lower Devonian Series | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T215461 — 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: Early Devonian Context triple: [Old Red Sandstone, geologicPeriodStart, Early Devonian]
-
A.
Paleozoic Era
The Paleozoic Era was an ancient geologic time interval, spanning roughly 541 to 252 million years ago, marked by the emergence and diversification of complex life in the seas and on land and the assembly of major continental landmasses.
-
B.
Proterozoic Eon
The Proterozoic Eon is a major division of Precambrian time, spanning from about 2.5 billion to 541 million years ago, marked by the buildup of atmospheric oxygen, the emergence of complex single-celled and early multicellular life, and the assembly of large continental landmasses.
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C.
Mesozoic Era
The Mesozoic Era was a major geological era, often called the "Age of Reptiles," during which dinosaurs dominated the land and the supercontinent Pangaea broke apart into modern continents.
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D.
Jurassic Period
The Jurassic Period was a major division of the Mesozoic Era characterized by warm climates, the dominance and diversification of dinosaurs, and the early evolution of birds.
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E.
Phanerozoic Eon
The Phanerozoic Eon is the current and most recent major division of Earth's history, marked by abundant fossil evidence and the evolution and diversification of complex life forms, including plants, animals, and eventually humans.
- 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: Early Devonian Target entity description: The Early Devonian was the initial subdivision of the Devonian Period, marked by the diversification of early fishes and the spread of primitive vascular land plants across emerging terrestrial ecosystems.
-
A.
Paleozoic Era
The Paleozoic Era was an ancient geologic time interval, spanning roughly 541 to 252 million years ago, marked by the emergence and diversification of complex life in the seas and on land and the assembly of major continental landmasses.
-
B.
Proterozoic Eon
The Proterozoic Eon is a major division of Precambrian time, spanning from about 2.5 billion to 541 million years ago, marked by the buildup of atmospheric oxygen, the emergence of complex single-celled and early multicellular life, and the assembly of large continental landmasses.
-
C.
Mesozoic Era
The Mesozoic Era was a major geological era, often called the "Age of Reptiles," during which dinosaurs dominated the land and the supercontinent Pangaea broke apart into modern continents.
-
D.
Jurassic Period
The Jurassic Period was a major division of the Mesozoic Era characterized by warm climates, the dominance and diversification of dinosaurs, and the early evolution of birds.
-
E.
Phanerozoic Eon
The Phanerozoic Eon is the current and most recent major division of Earth's history, marked by abundant fossil evidence and the evolution and diversification of complex life forms, including plants, animals, and eventually humans.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
geologic time interval
ⓘ
subdivision of the Devonian Period ⓘ |
| associatedWith | Rhynie Chert fossil locality ⓘ |
| boundaryDefinedBy |
Global Boundary Stratotype Section and Point at Klonk, Czech Republic
ⓘ
first appearance of the conodont Icriodus woschmidti ⓘ |
| characterizedBy |
brachiopod-rich marine faunas
ⓘ
development of early terrestrial ecosystems ⓘ diversification of early fishes ⓘ early ammonoid ancestors ⓘ evolution of early coral reefs ⓘ expansion of jawed fishes ⓘ expansion of terrestrial habitats along coastlines and floodplains ⓘ extensive shallow epicontinental seas ⓘ high sea levels ⓘ marine invertebrate diversification ⓘ presence of jawless agnathan fishes ⓘ spread of primitive vascular land plants ⓘ trilobite faunas in decline compared to earlier Paleozoic ⓘ warm global climate ⓘ |
| chronostratigraphicUnit |
Early Devonian
self-linksurface differs
ⓘ
surface form:
Lower Devonian Series
|
| containsStage |
Emsian
ⓘ
Lochkovian ⓘ Pragian ⓘ |
| endTime | approximately 393.3 million years ago ⓘ |
| fauna |
early acanthodian fishes
ⓘ
early placoderm fishes ⓘ jawless ostracoderms ⓘ lobe-finned sarcopterygian fishes ⓘ ray-finned actinopterygian fishes ⓘ rugose corals ⓘ stromatoporoid sponges ⓘ tabulate corals ⓘ |
| follows | Pridoli Epoch ⓘ |
| geologicalSetting |
active orogeny in Caledonian mountain belts
ⓘ
assembly of Euramerica continent ⓘ |
| notableFossils |
Aglaophyton
ⓘ
Rhynia ⓘ early terrestrial arthropods in Rhynie Chert ⓘ |
| partOf | Devonian Period ⓘ |
| plantFlora |
early lycophytes
ⓘ
primitive vascular plants ⓘ rhyniophytes ⓘ simple leafless stems with sporangia ⓘ zosterophylls ⓘ |
| precedes | Middle Devonian ⓘ |
| startTime | approximately 419.2 million years ago ⓘ |
| timeScale |
Paleozoic Era
ⓘ
Phanerozoic Eon ⓘ |
| usedIn |
International Commission on Stratigraphy
ⓘ
surface form:
International Commission on Stratigraphy timescale
|
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: Early Devonian Description of subject: The Early Devonian was the initial subdivision of the Devonian Period, marked by the diversification of early fishes and the spread of primitive vascular land plants across emerging terrestrial ecosystems.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Lower Devonian Series
subject surface form:
Laurussia
this entity surface form:
Early Devonian Period