FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term anterior spiracle primordium ID (Ontology) FBbt:00017001 (Fly Anatomy)
Definition Primordium of the anterior spiracle of the larva. Originates in the posterior third of the lateral ectoderm of the prothoracic segment during stage 14. A group of cells that are more basophilic than those surrounding them fuse with the tracheal pit of the mesothoracic segment (tracheal metamere 1).[ FlyBase:FBrf0064787 FlyBase:FBrf0089570 ]
Also Known As "embryonic anterior spiracle"
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Records annotated with this term OR any of its CHILD TERMS
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Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Alleles (FBal)  PHENOTYPE_MANIFEST_IN       1
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       3
Insertions (FBti)  PHENOTYPE_MANIFEST_IN       1
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 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes Insertions
 anterior spiracle primordium (all annotations which use CV term, excluding "NOT" statements)       1      7      4
     anterior spiracle primordium | embryonic stage 15       1       --       1
Spanning Tree (Parents/Children)
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  spiracle primordium
   |__embryonic/larval spiracle primordium
       |__anterior spiracle primordium  12 rec.
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Is a embryonic/larval spiracle primordium
Part of late extended germ band embryo
dorsal closure embryo
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Synonyms
  • "anterior spiracle specific anlage" RELATED
    "embryonic anterior spiracle" EXACT
    "P1 AntSpi" RELATED
Secondary IDs
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