FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term tracheal transverse connective primordium ID (Ontology) FBbt:00005580 (Fly Anatomy)
Definition Region of the tracheal primordium that develops into the embryonic/larval transverse connective. During stages 11 and 12, the invaginating tracheal pit forms an L shape. The arm of the L heading inwards from the surface forms the spiracular branch primordium, the other arm forms the transverse connective primordium.[ FlyBase:FBrf0064787 ]
Also Known As"embryonic transverse connective"
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)PHENOTYPE_MANIFEST_IN
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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 tracheal transverse connective primordium (all annotations which use CV term, excluding "NOT" statements)
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developing embryonic structure
 |__primary segmental tracheal branch primordium__
late extended germ band embryo                    |
 |__tracheal pit__________________________________|
 |__primary segmental tracheal branch primordium__|
tracheal primordium                               |
 |__tracheal pit__________________________________|
dorsal closure embryo                             |
 |__primary segmental tracheal branch primordium__|
primordium                                        |
 |__tracheal branch primordium____________________|
 |__primary segmental tracheal branch primordium__|
                                                  tracheal transverse connective primordium  21 rec.
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Is a tracheal branch primordium
primary segmental tracheal branch primordium
Part of tracheal pit
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Synonyms
  • "a and b branch" RELATED
    "embryonic transverse connective" EXACT
    "outer segmental trachea" RELATED
    "ventral segmental trachea" RELATED
Secondary IDs
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