Calamites
E573680
Calamites is an extinct genus of tree-like, jointed horsetail plants that formed part of the lush coal-forming forests of the Carboniferous period.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Calamites canonical | 2 |
| Calamitaceae | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6108898 — 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: Calamites Context triple: [Joggins Fossil Cliffs, containsFossilsOf, Calamites]
-
A.
Lepidodendron
Lepidodendron is an extinct genus of giant, tree-like lycopsid plants that dominated Carboniferous coal swamp forests.
-
B.
Sigillaria
Sigillaria is an extinct genus of tall, spore-bearing lycopsid trees that dominated Carboniferous coal swamp forests.
-
C.
Rhynia
Rhynia is an extinct genus of simple, leafless vascular plants from the Early Devonian period that represents one of the earliest well-preserved examples of land plant evolution.
-
D.
Asteroxylon mackiei
Asteroxylon mackiei is an early Devonian vascular land plant known from exceptionally well-preserved fossils that provide key insights into the evolution of plant structure and terrestrialization.
-
E.
Horneophyton lignieri
Horneophyton lignieri is an early Devonian land plant known from the Rhynie Chert, notable for its simple vascular structure and significance in understanding the evolution of terrestrial flora.
- 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: Calamites Target entity description: Calamites is an extinct genus of tree-like, jointed horsetail plants that formed part of the lush coal-forming forests of the Carboniferous period.
-
A.
Lepidodendron
Lepidodendron is an extinct genus of giant, tree-like lycopsid plants that dominated Carboniferous coal swamp forests.
-
B.
Sigillaria
Sigillaria is an extinct genus of tall, spore-bearing lycopsid trees that dominated Carboniferous coal swamp forests.
-
C.
Rhynia
Rhynia is an extinct genus of simple, leafless vascular plants from the Early Devonian period that represents one of the earliest well-preserved examples of land plant evolution.
-
D.
Asteroxylon mackiei
Asteroxylon mackiei is an early Devonian vascular land plant known from exceptionally well-preserved fossils that provide key insights into the evolution of plant structure and terrestrialization.
-
E.
Horneophyton lignieri
Horneophyton lignieri is an early Devonian land plant known from the Rhynie Chert, notable for its simple vascular structure and significance in understanding the evolution of terrestrial flora.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
extinct genus
ⓘ
fossil plant genus ⓘ sphenopsid ⓘ |
| class |
Equisetopsida
ⓘ
linked to:
Tracheophyta
|
| closelyRelatedTo |
Annularia (leaf form genus)
ⓘ
Arthropitys ⓘ Calamostachys (cone form genus) ⓘ |
| contributedTo | formation of coal seams ⓘ |
| division |
Equisetophyta
ⓘ
linked to:
Equisetum
|
| ecologicalRole | dominant component of Carboniferous coal swamps ⓘ |
| environment |
swampy floodplains
ⓘ
wet lowland forests ⓘ |
| family |
Calamitaceae
ⓘ
linked to:
Calamites
|
| firstAppearance | Late Mississippian ⓘ |
| fossilDistribution |
Asia
ⓘ
Europe ⓘ North America ⓘ other parts of former Euramerica and Gondwana ⓘ |
| fossilPart |
casts and molds of pith cavities
ⓘ
petrified stems ⓘ reproductive cones ⓘ rhizomes and roots ⓘ |
| geologicalContext | coal-forming forests ⓘ |
| growthForm |
arborescent horsetail
ⓘ
tree-like plant ⓘ |
| growthHabit | clonal stands via rhizomes ⓘ |
| hasCommonName | Calamites horsetails ⓘ |
| kingdom | Plantae ⓘ |
| lastAppearance | Permian ⓘ |
| leafArrangement | whorled leaves at nodes ⓘ |
| leafType | small, simple leaves ⓘ |
| maximumHeight | up to about 20–30 meters ⓘ |
| notableFeature |
bamboo-like appearance
ⓘ
large size compared to modern horsetails ⓘ |
| order |
Equisetales
ⓘ
linked to:
Equisetum
|
| photosyntheticOrgan | green stems ⓘ |
| relatedTo | Equisetum ⓘ |
| reproduction | spore-bearing cones ⓘ |
| reproductiveStructure | strobili ⓘ |
| rootSystem | rhizomatous roots ⓘ |
| stemDiameter | up to tens of centimeters ⓘ |
| stemTexture | woody ⓘ |
| stemType |
jointed stem
ⓘ
segmented stem with nodes and internodes ⓘ |
| supportTissue | secondary xylem ⓘ |
| taxonRank | genus ⓘ |
| temporalRange |
Carboniferous period
ⓘ
Late Paleozoic ⓘ
linked to:
Paleozoic Era
|
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: Calamites Description of subject: Calamites is an extinct genus of tree-like, jointed horsetail plants that formed part of the lush coal-forming forests of the Carboniferous period.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.