FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
CV Term Report
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General Information
Term embryonic/larval anterior spiracle ID (Ontology) FBbt:00000407 (Fly Anatomy)
Definition Embryonic/larval spiracle housed in a protrusion of the prothoracic segment. These spiracles only become functional in the second instar when the spiracle has a club-like structure with eight lobes. A fine thread from the anterior spiracular gland is associated with each of the lobes. Late in the second instar, 8 protruding branches (papillae) develop around this club like structure, these become the spiracular ducts of the third instar spiracle, each with a spiracular opening.[ FlyBase:FBrf0034081 FlyBase:FBrf0064787 ]
Also Known As "larval anterior spiracle"
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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      31
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION      25
Insertions (FBti)  PHENOTYPE_MANIFEST_IN       6
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN       5
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 Images Insertions Constructs
 embryonic/larval anterior spiracle (all annotations which use CV term, excluding "NOT" statements)      31     20      3     31     11
     embryonic/larval anterior spiracle | heat sensitive       2       --       --       --       1
     embryonic/larval anterior spiracle | larval stage       2       --       --       --       --
     embryonic/larval anterior spiracle | third instar larval stage       3       --       --       --       2
Spanning Tree (Parents/Children)
Only view relationship:
thoracic segment
 |__prothoracic segment________
larval tracheal system         |
 |__embryonic/larval spiracle__|
spiracle                       |
 |__embryonic/larval spiracle__|
                               embryonic/larval anterior spiracle  100 rec.
                                |__anterior spiracle retractor muscle 2 rec.
                                |   |__anterior spiracle retractor muscle cell 2 rec.
                                |__anterior spiracular gland 2 rec.
                                |__anterior spiracular scar
                                |__papilla of larval anterior spiracle 7 rec.
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Is a embryonic/larval spiracle
Develops from anterior spiracle primordium
Part of prothoracic segment
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Synonyms
  • "larval anterior spiracle" EXACT
Secondary IDs
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