{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.gill-slit","code":"thing-q3068417","url":"https://ver.cy/models/thing/q3068417/","name":"gill slit","alternateNames":[],"kind":"thing","status":"published","version":"0.1.0-research.1","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.LIV"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"A gill slit is one of a series of openings connecting the pharynx with the exterior, directly or through a surrounding chamber, through which water passes during feeding or respiration in various aquatic chordates and hemichordates.","purpose":"Enable an AI agent to identify a gill slit, assess its anatomical and functional state, and determine appropriate observation or investigation.","scope":{"in":["Anatomical location, margins and continuity of the opening","Position, count and arrangement within a branchial series","Connections to the pharynx, branchial chamber, atrium or external environment","Developmental stage and evidence that an opening has formed","Patency, deformation, obstruction and observed water passage"],"out":["The whole animal, its taxonomy, distribution and conservation status","Gill filaments, lamellae and their gas-exchange performance","The complete pharynx, branchial apparatus or ventilation mechanism","An operculum and its movements as a separate anatomical structure","Unopened embryonic pharyngeal pouches or clefts considered independently"],"boundaries":[]},"distinguishingFeatures":["Identify an actual aperture with anatomical continuity; a surface groove or unopened developmental cleft alone does not establish a gill slit.","Distinguish the opening from adjacent gill tissue: the slit is a passage, whereas filaments and lamellae are tissue structures.","Determine whether the observed aperture is an individual branchial opening or a shared outlet serving several gills.","Establish whether the passage opens externally or into another cavity; external visibility is not a universal identification test.","Resolve separately named openings, including spiracles, using taxon-specific anatomical conventions rather than appearance alone."],"structure":{"bundles":[{"id":"anatomical-identity","name":"Anatomical identity","description":"Establish what the term gill slit denotes in the particular animal.","layers":[{"id":"term-and-host","name":"Term and host","description":"Anchor identification to a taxon, life stage and anatomical usage.","findings":[{"id":"source-defined-slit","name":"Source-defined slit","description":"Record the anatomical meaning supported by a reference and its applicability to the specimen.","questions":[{"text":"What does gill slit denote in the anatomical terminology used for this taxon and life stage?","id":"source-defined-slit-q01","kind":"definition"},{"text":"Which anatomical reference or specimen observation supports that interpretation?","id":"source-defined-slit-q02","kind":"provenance"}]}]},{"id":"opening-boundaries","name":"Opening boundaries","description":"Separate the slit from adjacent tissues and other openings.","findings":[{"id":"aperture-versus-neighbours","name":"Aperture versus neighbours","description":"Identify the aperture and establish whether nearby gills, folds, shared outlets or separately named openings belong to it.","questions":[{"text":"Which tissue margins delimit this slit, and which adjacent structures belong to neighbouring models?","id":"aperture-versus-neighbours-q01","kind":"boundary"},{"text":"Is this an individual branchial opening, a shared outlet, a spiracle or an unresolved aperture?","id":"aperture-versus-neighbours-q02","kind":"definition"}]}]}]},{"id":"branchial-topology","name":"Branchial topology","description":"Describe the slit as a positioned connection within the animal's water pathway.","layers":[{"id":"passage-continuity","name":"Passage continuity","description":"Identify the compartments connected by the opening.","findings":[{"id":"connected-compartments","name":"Connected compartments","description":"Record both sides of the passage and distinguish observed continuity from anatomical inference.","questions":[{"text":"Which compartments does this opening connect, and does it reach the external environment directly?","id":"connected-compartments-q01","kind":"boundary"},{"text":"Was continuity established by direct observation, imaging, dissection or a reference description?","id":"connected-compartments-q02","kind":"provenance"}]}]},{"id":"serial-arrangement","name":"Serial arrangement","description":"Locate and enumerate slits without conflating internal passages and external outlets.","findings":[{"id":"position-and-count","name":"Position and count","description":"Assign side and ordinal position using a declared counting convention.","questions":[{"text":"How many openings are present on each side at the anatomical level being counted?","id":"position-and-count-q01","kind":"measurement"},{"text":"Which landmarks and counting direction identify this slit across repeated observations?","id":"position-and-count-q02","kind":"definition"}]}]}]},{"id":"development-and-geometry","name":"Development and geometry","description":"Relate aperture formation and dimensions to life stage and observation conditions.","layers":[{"id":"developmental-status","name":"Developmental status","description":"Establish whether a slit is formed and how its status relates to development.","findings":[{"id":"formation-and-persistence","name":"Formation and persistence","description":"Separate demonstrated perforation from an inferred developmental identity.","questions":[{"text":"What evidence establishes an open passage rather than an unopened pouch or cleft?","id":"formation-and-persistence-q01","kind":"boundary"},{"text":"What stage-specific evidence supports interpreting its presence or absence as expected development?","id":"formation-and-persistence-q02","kind":"provenance"}]}]},{"id":"aperture-geometry","name":"Aperture geometry","description":"Describe slit dimensions with the conditions needed for meaningful comparison.","findings":[{"id":"conditioned-dimensions","name":"Conditioned dimensions","description":"Record aperture size and shape alongside posture, ventilation phase and preparation effects.","questions":[{"text":"What are the slit length, width and, where measurable, projected open area?","id":"conditioned-dimensions-q01","kind":"measurement"},{"text":"How were posture, ventilation phase, viewing angle and preservation controlled or documented?","id":"conditioned-dimensions-q02","kind":"provenance"}]}]}]},{"id":"patency-and-assessment","name":"Patency and assessment","description":"Assess local passage condition and choose evidence-based follow-up.","layers":[{"id":"passage-state","name":"Passage state","description":"Evaluate obstruction and water passage independently.","findings":[{"id":"patency-and-flow","name":"Patency and flow","description":"Distinguish aperture openness from directly observed movement of water through it.","questions":[{"text":"Is the passage open, partly obstructed or occluded, and what observation supports that state?","id":"patency-and-flow-q01","kind":"measurement"},{"text":"Was water passage observed, in which direction and under what ventilation conditions?","id":"patency-and-flow-q02","kind":"measurement"}]}]},{"id":"local-abnormality","name":"Local abnormality","description":"Interpret margin changes and asymmetry using appropriate comparisons.","findings":[{"id":"condition-and-follow-up","name":"Condition and follow-up","description":"Record visible abnormalities, comparison evidence and the next investigation needed without assigning an unsupported cause.","questions":[{"text":"How do the margins and aperture compare with neighbouring slits, the opposite side and a suitable reference?","id":"condition-and-follow-up-q01","kind":"measurement"},{"text":"Which further observation or specialist assessment would resolve suspected obstruction, injury or developmental variation?","id":"condition-and-follow-up-q02","kind":"action"}]}]}]},{"id":"evidence-and-external-alignment","name":"Evidence and external alignment","description":"What the world already says about this thing, gathered so the model can be checked against it.","layers":[{"id":"reported-evidence","name":"Reported evidence","description":"Findings from the breadth pass, kept separate from the structural claims.","findings":[{"id":"evidence-confidence-notes","name":"Check these first","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these check these first hold for the sense of gill slit this model covers, and on what evidence?","id":"evidence-confidence-notes-q01","kind":"provenance"}]},{"id":"evidence-kinds","name":"Kinds and varieties","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these kinds and varieties hold for the sense of gill slit this model covers, and on what evidence?","id":"evidence-kinds-q01","kind":"provenance"}]},{"id":"evidence-real-world-use","name":"Real-world use","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these real-world use hold for the sense of gill slit this model covers, and on what evidence?","id":"evidence-real-world-use-q01","kind":"provenance"}]},{"id":"evidence-measurements","name":"Typical measurements","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these typical measurements hold for the sense of gill slit this model covers, and on what evidence?","id":"evidence-measurements-q01","kind":"provenance"}]},{"id":"evidence-failure-modes-and-hazards","name":"Failure modes and hazards","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these failure modes and hazards hold for the sense of gill slit this model covers, and on what evidence?","id":"evidence-failure-modes-and-hazards-q01","kind":"provenance"}]},{"id":"evidence-neighbours","name":"Neighbouring kinds and how to tell them apart","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these neighbouring kinds and how to tell them apart hold for the sense of gill slit this model covers, and on what evidence?","id":"evidence-neighbours-q01","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Describe gill slits, their function and their evolutionary significance from scientific sources.","Observe and record gill slits in specimens or images it is authorized to study."],"mustNot":["Harm, stress or keep live animals out of water to examine their gill slits.","Collect animals from protected species or areas for study without permits.","Misuse embryonic pharyngeal structures in humans to claim people have gills."],"requiresHuman":["Any procedure on a live animal for research or teaching."]},"ethics":{"considerations":["Fish, sharks and other aquatic animals can suffer when handled out of water.","Research on animals needs ethical review and minimal harm."],"affectedParties":["Fish, sharks and other aquatic chordates","Researchers","Students"]},"owners":{"steward":"Nobody: a structure of living animals.","roles":[],"masterSystems":[]},"relations":[{"target":"Q27162500","type":"parent","note":"registry parent class"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.gill-slit","Wikidata: Q3068417 (https://www.wikidata.org/wiki/Q3068417)"]},"properties":{"applicability":"required","items":["Host and life stage: Animal specimen or anatomical reference; taxon; developmental stage","Anatomical interpretation: Pharyngeal slit; external branchial slit; other source-defined usage; unresolved","Passage connections: Named cavity or compartment on each side of the opening","Serial position and laterality: Left, right or source-defined position; ordinal index with counting direction","Slit count: Integer openings per specified side, region and anatomical level","Aperture dimensions: Length and width in mm; projected area in mm²; posture and ventilation phase recorded","Patency: Open; partly obstructed; occluded; not yet perforated; indeterminate","Margin condition: Intact; swollen; torn; scarred; deformed; indeterminate","Observed water passage: Observed with direction recorded; not detected under stated conditions; unobserved"]},"recognition":{"applicability":"required","items":["A row of slit-like openings on the side of the head behind the mouth, as in sharks and rays.","In bony fish, hidden under a bony gill cover."]},"capabilities":{"applicability":"required","items":["Locate and label individual slits using side, serial position and anatomical landmarks.","Count and compare openings within a specimen or across matched life stages.","Measure aperture geometry under documented posture and ventilation conditions.","Trace or image anatomical connections using an appropriate observation method.","Record obstruction, damage or asymmetry and flag findings for specialist assessment.","Select further observation according to the animal's condition, the unresolved question and applicable handling requirements."]},"hazards":{"applicability":"required","items":["Gill damage from handling, pollution or parasites can suffocate the animal."]},"interfaces":{"applicability":"not-applicable","items":[]},"context":{"applicability":"required","items":["Gill slits occur in the anatomy of various aquatic chordates and hemichordates, with their arrangement and connections differing among groups.","They provide passages for water associated with respiration or filter feeding, depending on the organism.","They are examined in comparative anatomy, developmental biology and assessments of animal condition."]}},"sources":[{"title":"Wikidata item Q3068417: gill slit","url":"https://www.wikidata.org/wiki/Q3068417","note":"identity and sense of the item"},{"title":"Wikipedia: Gill slit","url":"https://en.wikipedia.org/wiki/Gill_slit","note":"general description of the item"}],"openQuestions":["Does the registry intend gill slit to cover both internal pharyngeal slits and external branchial slits, or only one usage?","Which taxon-specific conventions determine whether spiracles and shared branchial outlets fall within this entry?","What comparative anatomical evidence supports correspondence between structures called gill slits across the intended animal groups?","Which developmental references distinguish normal formation, persistence and closure from abnormal absence for each included taxon?","What observation methods and reference ranges support reliable assessment of slit dimensions, patency and local abnormalities?"],"resources":{"spec":"/models/things/publications/thing-q3068417/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q3068417/spec.json"],"providers":["Codex"],"researchStatus":"unreviewed","generatedAt":"2026-09-12T10:00:16Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"filled","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"not-applicable","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-07T10:10:29+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass","interaction.interfaces":"No standard or regulation applies specifically to the anatomical opening independently of the species and observational or experimental activity."},"score":1.0}}