FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term tracheal metamere 2 ID (Ontology) FBbt:00005027 (Fly Anatomy)
Definition Segmental unit of the tracheal system that is mainly found in the metathoracic segment.
Also Known As "Tr2"
Comment Note that terminal tracheation by each tracheal metamere extends beyond its segment of origin.
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       2
Insertions (FBti)  PHENOTYPE_MANIFEST_IN       1
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN       1
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 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes Insertions Constructs
 tracheal metamere 2 (all annotations which use CV term, excluding "NOT" statements)       2      2      1      1
     tracheal metamere 2 | cold sensitive       1       --       --       1
     tracheal metamere 2 | embryonic stage       1       --       1       --
Spanning Tree (Parents/Children)
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tracheal metamere
 |__thoracic tracheal metamere__
ectodermal derivative           |
 |__dorsal ectoderm derivative__|
                                tracheal metamere 2  24 rec.
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Is a dorsal ectoderm derivative
thoracic tracheal metamere
Develops from metathoracic tracheal primordium
Part of
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Synonyms
  • "Tr2" EXACT
    "tracheal hemisegment" RELATED
Secondary IDs
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