FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term dorsal air sac primordium ID (Ontology) FBbt:00007135 (Fly Anatomy)
Definition Primordium formed by tracheoblasts that bud from the tracheal branch which adheres to the wing disc during the late larval stage. During pupal stages this primordium forms an epithelial sac. Cells at the tip of this primordium show extensive protrusive activity - producing filopodia and lamellopodia - while maintaining epithelial integrity (including adherens junctions with their neighbors).[ FlyBase:FBrf0151893 FlyBase:FBrf0190195 ]
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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      73
Insertions (FBti)  PHENOTYPE_MANIFEST_IN       3
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN       8
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Relevant FlyBase reports
 Alleles Insertions Constructs
 dorsal air sac primordium (all annotations which use CV term, excluding "NOT" statements)      73      3      8
     dorsal air sac primordium | ectopic | third instar larval stage       2       --       1
     dorsal air sac primordium | somatic clone      66      3      4
     dorsal air sac primordium | third instar larval stage       5       --       3
     dorsal air sac primordium | third instar larval stage | heat sensitive       1       --       1
Spanning Tree (Parents/Children)
Only view relationship: 
primordium
 |__air sac primordium____________
epithelium                        |
 |__cuboidal/columnar epithelium__|
                                  dorsal air sac primordium  107 rec.
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Is a cuboidal/columnar epithelium
air sac primordium
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