Spirogyra
E910046
Spirogyra is a genus of filamentous green algae known for its spirally arranged chloroplasts and frequent use in biological studies of cell structure and reproduction.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Spirogyra canonical | 5 |
How this entity was disambiguated
This entity first appeared as the object of triple T11180399 — 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: Spirogyra Context triple: [Zygnematophyceae, includesGenus, Spirogyra]
-
A.
Zygnematophyceae
Zygnematophyceae is a class of freshwater green algae, including filamentous and unicellular forms like Spirogyra, that are among the closest algal relatives of land plants.
-
B.
Euglena
Euglena is a genus of single-celled, flagellated protists known for their mixotrophic nutrition, possessing both plant-like chloroplasts for photosynthesis and animal-like mobility.
-
C.
Sargassum natans
Sargassum natans is a free-floating brown alga commonly found in the Sargasso Sea, where it forms extensive mats that provide habitat for diverse marine life.
-
D.
Palmaria
Palmaria is a scenic Italian island off the Ligurian coast, known for its rugged cliffs, beaches, and views of the nearby town of Portovenere.
-
E.
Euglenida
Euglenida is a group of mostly unicellular, flagellated protists known for their flexible cell covering, distinctive feeding modes, and often photosynthetic members such as Euglena.
- 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: Spirogyra Target entity description: Spirogyra is a genus of filamentous green algae known for its spirally arranged chloroplasts and frequent use in biological studies of cell structure and reproduction.
-
A.
Zygnematophyceae
Zygnematophyceae is a class of freshwater green algae, including filamentous and unicellular forms like Spirogyra, that are among the closest algal relatives of land plants.
-
B.
Euglena
Euglena is a genus of single-celled, flagellated protists known for their mixotrophic nutrition, possessing both plant-like chloroplasts for photosynthesis and animal-like mobility.
-
C.
Sargassum natans
Sargassum natans is a free-floating brown alga commonly found in the Sargasso Sea, where it forms extensive mats that provide habitat for diverse marine life.
-
D.
Palmaria
Palmaria is a scenic Italian island off the Ligurian coast, known for its rugged cliffs, beaches, and views of the nearby town of Portovenere.
-
E.
Euglenida
Euglenida is a group of mostly unicellular, flagellated protists known for their flexible cell covering, distinctive feeding modes, and often photosynthetic members such as Euglena.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
genus
ⓘ
green alga ⓘ |
| asexualReproductionMethod | fragmentation ⓘ |
| cellStructureFeature |
distinct cell wall
ⓘ
large central vacuole ⓘ nucleus suspended by cytoplasmic strands ⓘ |
| cellType | eukaryotic ⓘ |
| cellularity | multicellular ⓘ |
| cellWallComponent | cellulose ⓘ |
| chloroplastArrangement | spiral ⓘ |
| chloroplastType | ribbon-shaped chloroplast ⓘ |
| class | Zygnematophyceae ⓘ |
| conjugationType |
lateral conjugation
ⓘ
scalariform conjugation ⓘ |
| describedAs |
pond scum
ⓘ
water silk ⓘ |
| discoveredBy | Dillwyn (as an early describer of the genus) ⓘ |
| distribution | cosmopolitan ⓘ |
| division | Chlorophyta ⓘ |
| ecologicalRole | primary producer ⓘ |
| environmentalIndicator | eutrophic freshwater conditions ⓘ |
| family | Zygnemataceae ⓘ |
| forms | zygospore ⓘ |
| habitat |
ditches
ⓘ
freshwater ⓘ ponds ⓘ slow-moving streams ⓘ |
| kingdom | Plantae ⓘ |
| morphology | filamentous ⓘ |
| nutritionType | photoautotrophic ⓘ |
| occurrence |
floating green scums on water surface
ⓘ
planktonic mats ⓘ |
| order |
Zygnematales
ⓘ
linked to:
Zygnematophyceae
|
| oxygenProduction | produces oxygen during photosynthesis ⓘ |
| pigment |
chlorophyll a
ⓘ
chlorophyll b ⓘ |
| reproductionType |
asexual reproduction
ⓘ
sexual reproduction ⓘ |
| sexualReproductionMethod | conjugation ⓘ |
| storageProduct | starch ⓘ |
| taxonRank | genus ⓘ |
| usedIn |
biology education
ⓘ
microscopy teaching ⓘ studies of cell structure ⓘ studies of mitosis ⓘ studies of reproduction ⓘ |
| visibleFeature |
slimy filaments
ⓘ
unbranched filaments ⓘ |
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: Spirogyra Description of subject: Spirogyra is a genus of filamentous green algae known for its spirally arranged chloroplasts and frequent use in biological studies of cell structure and reproduction.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.