FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term air sac primordium ID (Ontology) FBbt:00007477 (Fly Anatomy)
Definition Primordium of an air sac (a large, air filled sac of the adult tracheal system).[ FlyBase:FBrf0151893 ]
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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      38
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       7
Insertions (FBti)  PHENOTYPE_MANIFEST_IN       1
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN      36
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
 air sac primordium (all annotations which use CV term, excluding "NOT" statements)      38      3      8     39
     air sac primordium | absent | larval stage       2       --       --       2
     air sac primordium | cell non-autonomous | somatic clone | third instar larval stage       2       --       --       2
     air sac primordium | larval stage      24       --       1     22
     air sac primordium | larval stage | increased number       2       --       --       2
     air sac primordium | somatic clone | third instar larval stage       5       --       --       5
     air sac primordium | third instar larval stage       9       --       --       8
     air sac primordium | third instar larval stage | heat sensitive       2       --       --       2
Spanning Tree (Parents/Children)
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  developing material anatomical entity
   |__primordium
       |__air sac primordium  189 rec.
           |__dorsal air sac primordium 107 rec.
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