Placozoa
E443082
Placozoa is a phylum of simple, flat, millimeter-sized marine animals with only a few distinct cell types and no true tissues or organs, considered among the most basal and primitive of all multicellular animals.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Placozoa canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T4459947 — 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: Placozoa Context triple: [Nephrozoa, excludes, Placozoa]
-
A.
Entoprocta
Entoprocta is a small phylum of mostly marine, sessile, filter-feeding invertebrates that superficially resemble bryozoans but are distinguished by their crown of tentacles surrounding both mouth and anus.
-
B.
Xenacoelomorpha
Xenacoelomorpha is a phylum of simple, small, worm-like marine invertebrates considered among the most basal bilaterian animals and important for understanding early animal evolution.
-
C.
Gastrotricha
Gastrotricha are a phylum of microscopic, aquatic invertebrates characterized by a ciliated body used for locomotion and a simple, worm-like form found in marine and freshwater environments.
-
D.
Pycnoidei
Pycnoidei is a suborder of marine ray-finned fishes within the order Scorpaeniformes, comprising various bottom-dwelling, often spiny species.
-
E.
Nemertea
Nemertea, commonly known as ribbon worms, is a phylum of mostly marine, elongated, often brightly colored worms distinguished by their unique eversible proboscis used for hunting.
- 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: Placozoa Target entity description: Placozoa is a phylum of simple, flat, millimeter-sized marine animals with only a few distinct cell types and no true tissues or organs, considered among the most basal and primitive of all multicellular animals.
-
A.
Entoprocta
Entoprocta is a small phylum of mostly marine, sessile, filter-feeding invertebrates that superficially resemble bryozoans but are distinguished by their crown of tentacles surrounding both mouth and anus.
-
B.
Xenacoelomorpha
Xenacoelomorpha is a phylum of simple, small, worm-like marine invertebrates considered among the most basal bilaterian animals and important for understanding early animal evolution.
-
C.
Gastrotricha
Gastrotricha are a phylum of microscopic, aquatic invertebrates characterized by a ciliated body used for locomotion and a simple, worm-like form found in marine and freshwater environments.
-
D.
Pycnoidei
Pycnoidei is a suborder of marine ray-finned fishes within the order Scorpaeniformes, comprising various bottom-dwelling, often spiny species.
-
E.
Nemertea
Nemertea, commonly known as ribbon worms, is a phylum of mostly marine, elongated, often brightly colored worms distinguished by their unique eversible proboscis used for hunting.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
animal phylum
ⓘ
taxon ⓘ |
| bodyPlan | dorsoventrally flattened body ⓘ |
| bodyShape | flat ⓘ |
| cellAdhesion | simple cell junctions ⓘ |
| cellLayerOrganization |
intermediate fiber cell layer
ⓘ
lower epithelial layer ⓘ upper epithelial layer ⓘ |
| cellTypeDiversity | few distinct cell types ⓘ |
| circulatorySystem | no circulatory system ⓘ |
| commonName | placozoans ⓘ |
| describedAs | simple marine animals ⓘ |
| diet |
bacteria
ⓘ
microalgae ⓘ organic detritus ⓘ |
| digestiveSystem | no true gut ⓘ |
| discovery | first described in the late 19th century ⓘ |
| distribution | cosmopolitan in tropical and subtropical seas ⓘ |
| domain |
Eukaryota
ⓘ
linked to:
Eukarya
|
| evolutionarySignificance | among the simplest known multicellular animals ⓘ |
| feedingMode |
external digestion
ⓘ
phagocytosis ⓘ |
| gasExchange | diffusion across body surface ⓘ |
| genomeFeatures |
contains many genes shared with other metazoans
ⓘ
relatively small genome ⓘ |
| germLayers | diploblastic or ambiguous germ layer organization ⓘ |
| habitat |
benthic zone
ⓘ
marine environments ⓘ |
| kingdom | Animalia ⓘ |
| lifestyle | free-living ⓘ |
| locomotion | ciliary gliding ⓘ |
| musculature | no true muscles ⓘ |
| nervousSystem | no true nervous system ⓘ |
| notableSpecies | Trichoplax adhaerens ⓘ |
| organOrganization | lacking true organs ⓘ |
| osmoregulation | diffusion-based ⓘ |
| phylogeneticPosition | basal metazoans ⓘ |
| reproduction |
asexual reproduction by budding
ⓘ
asexual reproduction by fission ⓘ sexual reproduction (poorly understood) ⓘ |
| researchUse |
model for early animal evolution
ⓘ
model for minimal multicellularity ⓘ |
| respiratorySystem | no specialized respiratory organs ⓘ |
| skeleton | lacks hard skeleton ⓘ |
| substrateAssociation | moves along hard substrates ⓘ |
| symmetry | asymmetrical ⓘ |
| taxonRank | phylum ⓘ |
| tissueOrganization | lacking true tissues ⓘ |
| typicalSize | millimeter-sized ⓘ |
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: Placozoa Description of subject: Placozoa is a phylum of simple, flat, millimeter-sized marine animals with only a few distinct cell types and no true tissues or organs, considered among the most basal and primitive of all multicellular animals.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.