FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term embryonic/larval spiracle ID (Ontology) FBbt:00000406 (Fly Anatomy)
Definition Spiracle of the embryo or larva. In the latter, there are 10 pairs of spiracles, but only the most posterior is functional at all larval instars. The anterior spiracle becomes functional at the second larval stage.[ FlyBase:FBrf0064787 ]
Also Known As "larval spiracle"
Comment
Links to External Ontologies
Annotations
Records annotated with this term OR any of its CHILD TERMS
Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Alleles (FBal)  PHENOTYPE_MANIFEST_IN      45
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       1
Insertions (FBti)  PHENOTYPE_MANIFEST_IN      13
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN      14
show Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes Insertions Constructs
 embryonic/larval spiracle (all annotations which use CV term, excluding "NOT" statements)      45      5     14     15
     embryonic/larval spiracle | ectopic       2       --       --       1
     embryonic/larval spiracle | embryonic stage       5       --       2       --
     embryonic/larval spiracle | germline clone | maternal effect       3       --       --       --
     embryonic/larval spiracle | larval stage      11       --       2     10
     embryonic/larval spiracle | maternal effect       3       --       --       --
     embryonic/larval spiracle | third instar larval stage       1       --       --       --
Spanning Tree (Parents/Children)
Only view relationship: 
larva
 |__larval tracheal system____
tracheal system               |
 |__larval tracheal system____|
 |__spiracle__________________|
integumentary specialization  |
 |__spiracle__________________|
                              embryonic/larval spiracle  908 rec.
                               |__embryonic/larval anterior spiracle 100 rec.
                               |   |__anterior spiracle retractor muscle(+) 2 rec.
                               |   |__anterior spiracular gland 2 rec.
                               |   |__anterior spiracular scar
                               |   |__papilla of larval anterior spiracle 7 rec.
                               |__embryonic/larval posterior spiracle 793 rec.
                               |   |__spiracular chamber(+) 330 rec.
                               |   |__spiracular filament
                               |   |__spiracular plate(+) 22 rec.
                               |__non-functional larval spiracle
                                   |__non-functional larval spiracle of abdominal segment(+)
                                   |__non-functional larval spiracle of thoracic segment(+)
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Is a spiracle
Develops from embryonic/larval spiracle primordium
Part of larval tracheal system
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Synonyms
  • "larval spiracle" EXACT
Secondary IDs
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