cirrus
Enable an agent to recognise a biological cirrus, record its anatomical context and condition, and select appropriate observation or handling actions without treating all structures called cirri as equivalent.
Bundle → Layer → Finding → Questions Filled
6 bundles · 11 layers · 15 findings · 25 questions
Anatomical meaning Resolve what cirrus denotes for the bearer before interpreting its properties.
Bearer context
Bind the anatomical term to an identified organism and specimen.
Taxon-qualified identity
Establish which anatomical usage applies and retain uncertainty in the bearer identification.
- Which organism and specimen bear this candidate cirrus? definition
- Which anatomical reference supports calling this structure a cirrus in that taxon? provenance
Term boundaries
Separate naming, structural identity and proposed homology.
Cirrus versus neighbouring structures
Require explicit criteria for separating a cirrus from nearby or similarly named structures.
- Which attachment or structural features distinguish this cirrus from neighbouring tentacles, setae or processes? boundary
- Does the proposed comparison concern corresponding anatomy or merely structures sharing the word cirrus? boundary
Attachment and arrangement Identify where the cirrus belongs and how it relates to other cirri.
Attachment map
Record the base and its relationship to named anatomical landmarks.
Base and position
Locate the attachment independently of the free tip's posture.
- To which anatomical structure does the cirrus attach? definition
- Which side, body region or serial position identifies it unambiguously? measurement
Cirral grouping
Distinguish one cirrus from its branches and surrounding apparatus.
Counting unit
Define what is counted before comparing abundance or arrangement.
- Does each counted element represent a cirrus, one branch or a segment? boundary
- How many cirri are visible in the specified pair, row or region, and which positions remain obscured? measurement
Cirral morphology Characterise the structure at the scale needed for anatomical discrimination.
Shape and scale
Measure proportions with posture and landmarks specified.
Reproducible dimensions
Define length and width so measurements remain comparable.
- What are the base-to-tip length and basal width, and was length traced along the structure or measured as a straight span? measurement
- Was the cirrus extended, curved or partly withdrawn during measurement? measurement
Construction and surface
Describe visible architecture without imposing one taxon's anatomy on another.
Architectural characters
Record applicable branches, articulations and surface structures with observation limits.
- Which branches, segments or articulations can be resolved and counted? measurement
- Which surface structures are present, and what evidence separates them from debris or preparation artefacts? boundary
Deployment and function Connect cirral behaviour to a supported functional interpretation.
Movement observation
Capture how the cirrus changes position under documented conditions.
Deployment pattern
Distinguish observed movement from an interpretation of a static posture.
- What extension, withdrawal, bending or repeated movement is directly visible? measurement
- What observation would distinguish active cirral movement from displacement by water flow or specimen handling? action
Functional evidence
Relate the structure to an observed interaction or taxon-specific account.
Supported role
Keep directly observed roles separate from literature-based interpretations.
- Which interaction supports the proposed feeding, attachment, sensory, reproductive or other role? provenance
- What additional observation could distinguish the leading functional interpretation from plausible alternatives? action
Condition and observability Assess whether the observed cirrus faithfully represents its anatomy and current condition.
Integrity assessment
Evaluate completeness without treating invisibility as absence.
Missing or hidden
Distinguish visible damage from unresolved absence.
- Are the attachment, shaft and tip visible, and is there evidence of breakage or other damage? measurement
- Could apparent absence instead reflect withdrawal, orientation, obscuration or insufficient resolution? boundary
Preparation and next observation
Account for observation methods and choose the next informative action.
Observation fitness
Match further examination to the unresolved cirral character and specimen condition.
- Was the cirrus observed alive, fixed, mounted or dissected, and which preparation effects could alter the character being assessed? provenance
- Would a changed viewing angle, higher magnification or time-resolved observation resolve the uncertainty with minimal disturbance? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these check these first hold for the sense of cirrus this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these kinds and varieties hold for the sense of cirrus this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these real-world use hold for the sense of cirrus this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these failure modes and hazards hold for the sense of cirrus this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of cirrus this model covers, and on what evidence? provenance
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.OBJ
What it is Filled
In biology, a cirrus is a slender appendage or projecting structure whose anatomy and function depend on the organism, with the term applied to structures that are not necessarily evolutionarily homologous.
In scope
- The taxon-specific anatomical meaning of cirrus and its application to a particular specimen
- Attachment site, positional identity and membership in a cirral pair, row or apparatus
- Cirral dimensions, branching, segmentation and surface structures
- Observed movement and evidence for the structure's function
- Integrity, visibility and preparation effects affecting interpretation
Out of scope
- Cirrus clouds and atmospheric classification
- Whole-organism taxonomy, conservation assessment and geographic range
- Complete feeding, sensory, attachment or reproductive systems beyond the cirrus and its immediate interfaces
- Tentacles, setae, cilia and other neighbouring structures not identified as cirri in the applicable anatomical terminology
- An assumption that structures sharing the name cirrus have a common evolutionary origin
Why it exists Filled
Enable an agent to recognise a biological cirrus, record its anatomical context and condition, and select appropriate observation or handling actions without treating all structures called cirri as equivalent.
Distinguishing features Filled
- Require identification of a biological bearer and anatomical attachment site; a wispy appearance alone does not establish a cirrus.
- Check whether a taxon-specific anatomical description calls the structure a cirrus and whether its position matches that description.
- Use branching, articulation, surface features and attachment to distinguish the candidate from adjacent appendages; no single silhouette should serve as a universal test.
- Distinguish the cirrus itself from processes attached near its base: the Natural History Museum of Los Angeles County separately defines a cirriped filamentary appendage in that position. [Crustacea Glossary](https://research.nhm.org/glossary/define.html?term=Filamentary+appendage)
- Treat an individual cirrus, a paired set and a complete cirral apparatus as different observation units.
What robots and AI may and may not do Filled
Must not
- Confuse the biological cirrus with cirrus clouds in data or descriptions.
- Treat cirri in different organisms as the same evolved structure without evidence.
- Collect protected animals from the wild for study without permission.
Only with a human decision
- Destructive sampling of rare or protected specimens.
May
- Describe cirri in different organisms, such as barnacles, ciliates or crinoids, from reliable sources.
- Record the presence and form of cirri when identifying specimens.
Moral aspects Filled
- Accurate descriptions support correct identification and research.
- Marine animals with cirri live in habitats that can be harmed by collection.
Who is affected
- Marine and freshwater animals
- Researchers and students
Owners Filled
Steward
Nobody owns the concept; the keeper of each specimen answers for it.
Links to other meta-models Filled
parent
- Q170494 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.cirrus-q1093125
- Wikidata: Q1093125 (https://www.wikidata.org/wiki/Q1093125)
Direct properties required Filled
- Bearer and anatomical usage: Specimen identifier, taxon identification and applicable anatomical reference
- Attachment and positional identity: Named body region, side, serial position and attachment structure; unresolved where necessary
- Extent and proportions: Length and basal width in µm or mm; length relative to a named anatomical landmark
- Cirral architecture: Branching pattern, articulated or unarticulated construction, and applicable surface features
- Cirral and segment counts: Number of cirri per defined region; branches or segments per specified cirrus when applicable
- Deployment and movement: Extended, withdrawn, folded, moving, stationary or unobservable; terminology qualified by anatomy
- Functional interpretation: Feeding, attachment, sensory, reproductive, other or unresolved; each marked observed or inferred
- Structural condition: Apparently intact, damaged, obscured, apparently absent or indeterminate
Recognition required Filled
- Slender, often curled appendages, such as the feathery feeding legs of barnacles.
- Under a microscope, tufts of fused cilia on some single-celled organisms.
Capabilities and actions required Filled
- Locate and annotate a candidate cirrus in a specimen image using attachment and positional landmarks.
- Compare corresponding cirri using a taxon-specific anatomical reference.
- Measure dimensions and count branches or segments under documented viewing conditions.
- Observe deployment and movement to evaluate a proposed function.
- Flag damage, obscuration or uncertain identity and select a follow-up observation method.
Hazards and failure modes required Filled
- Homonyms with clouds and plant tendrils can cause wrong records in databases.
Standards and interfaces not applicable Not applicable
Not applicable
No single standard, regulation or official classification applies across the anatomically distinct structures called cirri.
Context of use required Filled
- Biological cirri are encountered in anatomical observation, species identification and studies of animal behaviour.
- Depending on the organism, these structures can serve sensory, feeding, attachment, locomotor or reproductive functions.
Sources Filled
- Wikidata item Q1093125: cirrus - identity and sense of the item
- Wikipedia: Cirrus (zoology) - general description of the item
Open questions
- Does Wikidata Q1093125 denote the broad biological anatomical term assumed here, and what exact scope should the registry definition adopt?
- Which taxon-specific usages, including reproductive structures or ciliary assemblies called cirri, fall within this registry entry?
- Which anatomical references provide reliable identification criteria for each included usage, and where are homology claims supported?
- Which dimensions, counts and condition criteria are diagnostic within each bearer taxon and life stage?
- Does an existing Vercy world model already own this concept, requiring this entry to link to it instead of creating a separate publication?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q1093125/spec.json