Pikaia
E779334
Pikaia is an early chordate from the Cambrian period, often cited as one of the earliest known ancestors of vertebrates.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Pikaia canonical | 2 |
| Pikaia gracilens | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T9128558 — 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: Pikaia Context triple: [Cambrian biota, includesTaxon, Pikaia]
-
A.
Dickinsonia
Dickinsonia is an extinct, soft-bodied, segmented organism from the late Ediacaran Period, notable for its quilted, oval shape and its debated position in the tree of life.
-
B.
Pannotia
Pannotia was a short-lived Neoproterozoic supercontinent that formed after the breakup of Rodinia and existed roughly 650–540 million years ago.
-
C.
Kimberella
Kimberella is an extinct, soft-bodied marine organism from the late Precambrian Ediacaran period, often considered one of the earliest known animals with possible mollusc-like features.
-
D.
Lophotibis
Lophotibis is a genus of ibises, best known for the Madagascar crested ibis, and is endemic to Madagascar.
-
E.
Neopilina
Neopilina is a genus of deep-sea mollusks considered living fossils, providing key insights into the evolution and ancestral features of molluscan groups.
- 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: Pikaia Target entity description: Pikaia is an early chordate from the Cambrian period, often cited as one of the earliest known ancestors of vertebrates.
-
A.
Dickinsonia
Dickinsonia is an extinct, soft-bodied, segmented organism from the late Ediacaran Period, notable for its quilted, oval shape and its debated position in the tree of life.
-
B.
Pannotia
Pannotia was a short-lived Neoproterozoic supercontinent that formed after the breakup of Rodinia and existed roughly 650–540 million years ago.
-
C.
Kimberella
Kimberella is an extinct, soft-bodied marine organism from the late Precambrian Ediacaran period, often considered one of the earliest known animals with possible mollusc-like features.
-
D.
Lophotibis
Lophotibis is a genus of ibises, best known for the Madagascar crested ibis, and is endemic to Madagascar.
-
E.
Neopilina
Neopilina is a genus of deep-sea mollusks considered living fossils, providing key insights into the evolution and ancestral features of molluscan groups.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
early chordate
ⓘ
extinct genus ⓘ fossil taxon ⓘ mountain ⓘ species ⓘ stem-group chordate ⓘ |
| approximateAgeInMillionsOfYears | 508 ⓘ |
| bodyLength | about 4 centimeters ⓘ |
| bodyShape | elongated ⓘ |
| bodySymmetry | bilateral symmetry ⓘ |
| clade | Deuterostomia ⓘ |
| coexistsWith |
Anomalocaris
ⓘ
Hallucigenia ⓘ Marella ⓘ Opabinia ⓘ |
| countryOfFossilDiscovery | Canada ⓘ |
| describedBy | Charles Doolittle Walcott ⓘ |
| ecologicalRole | small marine invertebrate ⓘ |
| environment | shallow marine environment ⓘ |
| fossilAssemblage |
Burgess Shale biota
ⓘ
linked to:
Burgess Shale fossil lagerstätte
|
| fossilPreservationType | soft-bodied preservation ⓘ |
| fossilSite |
Burgess Shale
ⓘ
linked to:
Burgess Shale fossil lagerstätte
|
| fossilsStoredAt |
Royal Ontario Museum
ⓘ
Smithsonian Institution ⓘ |
| genus | Pikaia ⓘ |
| geologicalPeriod |
Cambrian
ⓘ
linked to:
Cambrian Period
|
| hasStructure |
dorsal organ
ⓘ
fin-like lateral folds ⓘ myomeres ⓘ notochord ⓘ possible vascular system ⓘ tentacle-like head appendages ⓘ |
| kingdom | Animalia ⓘ |
| likelyDiet | suspension feeder ⓘ |
| likelyLifestyle | benthic swimmer ⓘ |
| locatedIn | Banff National Park ⓘ |
| locomotion | lateral body undulation ⓘ |
| mountainRangeOfFossilDiscovery |
Canadian Rockies
ⓘ
linked to:
Alberta’s Rocky Mountains
|
| namedAfter | Pika Peak ⓘ |
| phylum | Chordata ⓘ |
| relatedTo |
cephalochordates
ⓘ
vertebrates ⓘ |
| resembles | modern lancelets ⓘ |
| significance |
key taxon in discussions of vertebrate origins
ⓘ
one of the earliest known chordates ⓘ possible early ancestor of vertebrates ⓘ |
| temporalRange | Middle Cambrian ⓘ |
| typeSpecies |
Pikaia gracilens
ⓘ
linked to:
Pikaia
|
| yearDescribed | 1911 ⓘ |
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: Pikaia Description of subject: Pikaia is an early chordate from the Cambrian period, often cited as one of the earliest known ancestors of vertebrates.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.