silverfish
Enable an agent to recognise silverfish, distinguish taxonomic identity from individual condition and local occurrence, and choose proportionate observation or management actions.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
recalled by Codex without web access - no source was read
Researched by: Codex
Purpose and description
Enable an agent to recognise silverfish, distinguish taxonomic identity from individual condition and local occurrence, and choose proportionate observation or management actions.
Silverfish, in the usual species sense, is Lepisma saccharinum Linnaeus, 1758, a wingless, scale-covered insect of the order Zygentoma with three terminal appendages, commonly associated with sheltered, humid habitats in buildings.
It can be Document diagnostic images or a specimen and request expert identification when species characters are unresolved.; Map refuges and measure moisture conditions around confirmed occurrences.; Monitor activity using a consistent inspection or trapping method.; Inspect vulnerable materials and distinguish observed feeding from suspected damage.; Select and evaluate moisture reduction, refuge reduction or material protection according to verified conditions.; Escalate persistent, damaging activity to a qualified pest or collection-care specialist with the evidence collected..
Distinguishing features
Check for a wingless insect with a tapering body, long antennae and three terminal filaments; this combination supports a silverfish-like identification but does not alone establish the species.
Record whether the body has silvery scales; allow for developmental stage, moulting and scale loss before interpreting their absence.
Compare body pattern, bristles and appendage proportions with an authoritative identification key to distinguish common silverfish from long-tailed silverfish and firebrats.
Use moisture and temperature observations as supporting habitat evidence, never as a substitute for diagnostic morphology.
Require an organism, specimen or diagnostic image for identification; damage to paper or adhesive alone does not establish silverfish presence.
Scope
+ Species identification and explicit separation of taxon, population and individual records
+ Body form, developmental stage, moulting and individual condition
+ Microhabitat, moisture conditions, food resources and occurrence
+ Reproduction, persistence and evidence of local population change
+ Material damage attribution and proportionate management
- Other silverfish species and firebrats as independently modelled taxa
- Building-wide moisture faults and their engineering repair
- Collection conservation and restoration of damaged objects
- Pesticide formulation, registration and application protocols
- General household pest communities unrelated to the recorded silverfish occurrence
Characteristics
- Taxonomic identity
- Candidate Lepisma saccharinum; other identified Zygentoma; unresolved silverfish-like insect Prevents a broad common name from silently becoming a species-level identification.
- Record subject
- Taxon; local population; individual; occurrence evidence Keeps species-level assessments separate from an individual's condition or a building's activity.
- Identification evidence
- Linked specimen or images, diagnostic key, identifier and identification date Makes species assignments reviewable.
- Body length
- mm, excluding antennae and terminal filaments; method recorded Supports comparison without confusing appendage length with body size.
- Diagnostic morphology
- Scale colour and pattern; bristle arrangement; terminal filament proportions; unobservable Captures characters needed to distinguish similar household insects.
- Development and condition
- Egg; immature; adult; unresolved stage; live or dead; moulting evidence; appendage damage Supports interpretation of identification limits and local reproduction.
- Sex determination
- Female; male; undetermined, with diagnostic basis Avoids inferring sex or reproductive capacity from size alone.
- Microhabitat conditions
- Temperature in °C and relative humidity in %, with location and sampling period Connects activity to the conditions actually experienced in refuges.
- Resource and refuge association
- Observed contact with cracks, stored paper, adhesives, textiles, debris or other recorded substrates Separates nearby materials from demonstrated food or shelter use.
- Monitoring activity
- Individuals per trap-day or per timed inspection, with method and trap location Supports comparable trends without treating captures as total population size.
- Damage attribution
- No damage observed; suspected association; feeding observed; attribution unresolved Prevents presence alone from being treated as proof of damage.
- Geographic and conservation context
- Occurrence locality, native or introduced status with source, and dated conservation assessment or assessment not located Separates local occurrence from range history and conservation status.
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.silverfish
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 5 bundles · 9 layers · 16 findings · 24 questions.
Identity and species boundary Resolve what the registry name denotes and what the available evidence identifies.
Silverfish can function as a species name or a broader common label, leading to incorrect transfer of biological claims.
Taxonomic anchor
Anchor the intended concept to an authoritative taxon while preserving uncertainty.
Registered sense
The draft treats Lepisma saccharinum as a candidate interpretation requiring registry and taxonomic verification.
- Does vr.tr.silverfish denote Lepisma saccharinum specifically or a broader grouping of silverfish? boundary
- Which taxonomic authority verifies the accepted name, naming authority and date, synonyms, and GBIF and NCBI identifiers? provenance
Diagnostic separation
Evaluate visible and specialist characters against likely lookalikes.
Lookalike exclusion
Record the characters supporting identification and those unavailable in the evidence.
- Which scale, bristle and terminal filament characters distinguish this specimen from long-tailed silverfish and firebrats? definition
- Is the specimen or image adequate for species identification, or must the record remain at a broader taxonomic level? boundary
Development and local reproduction Interpret individual stages, moulting evidence and signs of reproduction.
A single sighting, a shed skin and a reproducing population imply different states and actions.
Individual stage and condition
Describe the observed insect without overstating age or maturity.
Stage, sex and moult
Keep stage and sex assignments tied to diagnostic evidence, including the effects of moulting and damage.
- What observable characters establish developmental stage and sex, and which require magnification or expert examination? definition
- Could pale appearance, missing scales or short appendages reflect moulting or injury rather than another species or stage? boundary
Population establishment
Assess whether observations support local reproduction and persistence.
Reproduction evidence
Distinguish repeated arrivals from evidence that silverfish complete development at the site.
- Are eggs, confidently identified immature individuals or repeated stage classes documented in the same refuge? measurement
- What observation period and species-specific developmental evidence would support local establishment rather than repeated introduction? boundary
Habitat, resources and range Connect occurrences to measured refuge conditions, resource use and geographic context.
Room-level observations and broad distribution claims can conceal the conditions sustaining a local occurrence.
Refuge and resource use
Locate shelter and distinguish actual feeding from proximity to materials.
Microhabitat support
Record temperature, moisture, shelter and feeding evidence at the insect's location.
- What temperature and relative humidity occur inside occupied cracks or storage refuges over time? measurement
- Which paper, adhesive, textile or debris resources show observed feeding rather than simple co-occurrence? measurement
Geographic and conservation context
Separate verified occurrence from native-range interpretation and formal conservation assessment.
Range and assessment evidence
Attach geographic and conservation claims to dated sources and the correct taxon.
- Which sources distinguish the species' proposed native range from introduced or indoor occurrences? provenance
- Is there an IUCN assessment for the resolved taxon, and what category and assessment year does it report? provenance
Damage, monitoring and response Translate occurrence evidence into justified material protection and management decisions.
Silverfish presence does not by itself establish material damage, population size or a need for intervention.
Activity and damage attribution
Measure comparable activity and assess the causal evidence for damage.
Activity linked to material loss
Keep monitoring counts separate from abundance estimates and damage attribution.
- How do captures per trap-day or sightings per timed inspection vary by location under a consistent method? measurement
- What evidence links fresh material loss to silverfish rather than another insect, abrasion or earlier damage? boundary
Intervention and follow-up
Choose actions based on identified conditions and assess their outcome.
Proportionate response
Tie management to vulnerable materials, demonstrated activity and measurable outcomes.
- Which verified moisture sources, accessible refuges or exposed materials can be addressed to reduce silverfish activity or damage? action
- What follow-up duration and monitoring results would justify continuing, changing or escalating the intervention? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
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.
- The registry provides no sense: this account assumes Lepisma saccharinum, although 'silverfish' can also refer more broadly to related Zygentoma.
- Exact GBIF and NCBI identifiers, native range, and any IUCN assessment category and year require checking; none is asserted here.
- Development proceeds through egg and immature stages to adulthood without a pupal stage; sex differences are subtle and reliable identification requires specialist morphological examination.
- Which of these check these first hold for the sense of silverfish this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- Zoological scientific name - Lepisma saccharinum Linnaeus, 1758 - Species in the family Lepismatidae, order Zygentoma.
- GBIF taxon key - Numeric taxon identifier - The species identifier requires verification.
- NCBI Taxonomy ID - Numeric taxon identifier - The species identifier requires verification.
- Which of these identifiers and schemes hold for the sense of silverfish this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- The International Code of Zoological Nomenclature, maintained by the International Commission on Zoological Nomenclature, governs the scientific naming of this animal.
- Which of these standards and regulation hold for the sense of silverfish this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Subject of household and museum integrated pest management.
- Study organism for wingless insect development and continued moulting after sexual maturity.
- Which of these real-world use hold for the sense of silverfish this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Adult body length, excluding antennae and terminal appendages - Approximately 7-15 - mm
- Which of these typical measurements hold for the sense of silverfish 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.
- Feeding can damage paper, bookbinding paste, wallpaper adhesives and some textiles.
- Damage and shed material can affect stored collections and household goods.
- Misidentification of related household insects can lead to unsuitable pest-management assumptions.
- Which of these failure modes and hazards hold for the sense of silverfish this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Widely distributed through human transport and associated with buildings in many regions.
- Outdoor occurrence depends on local climate and suitable sheltered microhabitats; its original native range is uncertain.
- Which of these regional variation hold for the sense of silverfish 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.
- Firebrat - Thermobia domestica is a different species, typically mottled rather than uniformly silvery, and associated with warmer environments.
- Long-tailed silverfish - A related species distinguished using features including longer appendages and more conspicuous bristles; it can occupy drier indoor environments.
- Zygentoma - The order includes silverfish and related insects; it is a broader taxonomic group than Lepisma saccharinum.
- An individual silverfish - An individual has its own age, sex and condition; the species is the taxonomic entity encompassing individuals and populations.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of silverfish this model covers, and on what evidence? provenance
What the second pass must settle
- Does the registry intend Lepisma saccharinum specifically, and what authoritative name, authority date, GBIF identifier and NCBI identifier anchor that interpretation?
- Which diagnostic characters reliably separate the intended taxon from locally occurring lookalikes across immature, freshly moulted and damaged specimens?
- What evidence establishes native range, introduced distribution and any IUCN category with assessment year?
- Which species-specific developmental, reproductive and moisture requirements are sufficiently supported to guide interpretation of local persistence?
- What monitoring periods and material-specific damage evidence support intervention decisions without mistaking trap activity for population size?