Thelodonti
E414614
Thelodonti are an extinct group of small, jawless vertebrates characterized by distinctive scale-covered bodies, known primarily from Silurian and Devonian marine deposits.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Galeaspida | 1 |
| Thelodonti canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4138796 — 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: Thelodonti Context triple: [Agnatha, includesExtinctGroup, Thelodonti]
-
A.
Placodermi
Placodermi is an extinct class of armored prehistoric fishes that were among the earliest jawed vertebrates.
-
B.
Acanthodii
Acanthodii are an extinct class of early jawed fishes, often called "spiny sharks," that played a key role in the evolution of vertebrate jaws and fins.
-
C.
Holocephali
Holocephali is a subclass of cartilaginous fishes that includes the chimaeras, deep-sea relatives of sharks and rays characterized by a single gill opening and distinctive tooth plates.
-
D.
Gnathostomata
Gnathostomata is a major clade of jawed vertebrates that includes most living fish, amphibians, reptiles, birds, and mammals.
-
E.
Dentatherinidae
Dentatherinidae is a small family of ray-finned fishes within the order Atheriniformes, comprising specialized silverside-like species found in marine and brackish waters.
- 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: Thelodonti Target entity description: Thelodonti are an extinct group of small, jawless vertebrates characterized by distinctive scale-covered bodies, known primarily from Silurian and Devonian marine deposits.
-
A.
Placodermi
Placodermi is an extinct class of armored prehistoric fishes that were among the earliest jawed vertebrates.
-
B.
Acanthodii
Acanthodii are an extinct class of early jawed fishes, often called "spiny sharks," that played a key role in the evolution of vertebrate jaws and fins.
-
C.
Holocephali
Holocephali is a subclass of cartilaginous fishes that includes the chimaeras, deep-sea relatives of sharks and rays characterized by a single gill opening and distinctive tooth plates.
-
D.
Gnathostomata
Gnathostomata is a major clade of jawed vertebrates that includes most living fish, amphibians, reptiles, birds, and mammals.
-
E.
Dentatherinidae
Dentatherinidae is a small family of ray-finned fishes within the order Atheriniformes, comprising specialized silverside-like species found in marine and brackish waters.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
agnathan
ⓘ
extinct vertebrate group ⓘ jawless vertebrate clade ⓘ stem-gnathostome ⓘ |
| bodyCovering |
dermal denticles
ⓘ
microscopic scales ⓘ |
| characteristic |
heterogeneous scale morphology across body regions
ⓘ
jawless mouth ⓘ laterally compressed body in many forms ⓘ reduced or absent paired fins ⓘ small body size ⓘ well-developed caudal fin ⓘ |
| clade | Agnatha ⓘ |
| diet | microphagous ⓘ |
| distinctFrom |
Anaspida
ⓘ
Heterostraci ⓘ
linked to:
Ostracodermi
Ostracodermi ⓘ |
| distribution |
Baltica
ⓘ
Gondwana margins ⓘ Laurentia ⓘ Siberia ⓘ |
| environment |
benthic
ⓘ
pelagic ⓘ |
| extinctionStatus | extinct ⓘ |
| feedingMode | suction feeding ⓘ |
| firstAppearance | Early Silurian ⓘ |
| fossilRecord |
known mainly from isolated scales
ⓘ
rare articulated specimens ⓘ |
| geologicalDeposits |
Devonian marine sediments
ⓘ
Silurian marine sediments ⓘ |
| habitat | marine ⓘ |
| importance | key for early vertebrate evolution studies ⓘ |
| kingdom | Animalia ⓘ |
| lastAppearance | Late Devonian ⓘ |
| notableFossilElement | thelodont scales ⓘ |
| phylum | Chordata ⓘ |
| researchField |
paleontology
ⓘ
vertebrate paleontology ⓘ |
| resembles | modern lampreys in overall size range ⓘ |
| scaleComposition |
dentine
ⓘ
enameloid ⓘ |
| scaleFunction |
hydrodynamic streamlining
ⓘ
protection ⓘ |
| skeletonType | cartilaginous endoskeleton ⓘ |
| subphylum | Vertebrata ⓘ |
| taxonomicRank | class ⓘ |
| timeRange |
Devonian
ⓘ
Silurian ⓘ |
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: Thelodonti Description of subject: Thelodonti are an extinct group of small, jawless vertebrates characterized by distinctive scale-covered bodies, known primarily from Silurian and Devonian marine deposits.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Thelodonti