FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term visceral tracheal branch primordium ID (Ontology) FBbt:00017003 (Fly Anatomy)
Definition Tracheal primordium that develops into the embryonic/larval visceral branch. It branches anteriorly from the dorsal portion of the transverse connective primordium during stage 12, coursing anteriorly and inwardly towards the gut.[ FlyBase:FBrf0064787 ]
Also Known As"embryonic visceral branch" ; "P1 VisTra" ; "visceral branch specific anlage"
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
Insertions (FBti)PHENOTYPE_MANIFEST_IN
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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Relevant FlyBase reports
 Alleles Genes Insertions Constructs
 visceral tracheal branch primordium (all annotations which use CV term, excluding "NOT" statements)
     visceral tracheal branch primordium | ectopic
      --       --
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Vocabulary search 
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__|
                                                  visceral tracheal branch primordium  35 rec.
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Is a tracheal branch primordium
primary segmental tracheal branch primordium
Part of tracheal pit
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Synonyms
  • "embryonic visceral branch" EXACT
    "intestinal branch" RELATED
    "k branch" RELATED
    "P1 VisTra" EXACT
    "visceral branch specific anlage" EXACT
Secondary IDs
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