FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term vertical bristle ID (Ontology) FBbt:00004121 (Fly Anatomy)
Definition Bristle of the posterior dorsal head, close to the eye (Eichler et al., 2024). There are usually four of these on each side, two larger and two smaller (Eichler et al., 2024).[ FlyBase:FBrf0007734 FlyBase:FBrf0031004 FlyBase:FBrf0259346 ]
Also Known As"vertical seta" ; "Vt bristle"
CommentPreviously only comprised the two large vertical bristles, but two additional smaller bristles identified by Eichler et al. (2024).
Links to External Ontologies
VFB:FBbt_00004121
Annotations
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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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 Full annotation statements 
Relevant FlyBase reports
 Alleles Images Insertions Constructs
 vertical bristle (all annotations which use CV term, excluding "NOT" statements)
     vertical bristle | pharate adult stage | increased number
      --       --       --
     vertical bristle | somatic clone - Minute background | increased number
      --       --       --
Spanning Tree (Parents/Children)
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Vocabulary search 
adult head capsule
 |__vertex______________
chaeta                  |
 |__adult head bristle__|
mechanosensory chaeta   |
 |__macrochaeta_________|
adult head sensillum    |
 |__adult head bristle__|
region of integument    |
 |__vertex______________|
                        vertical bristle  60 rec.
                         |__vertical bristle 1 25 rec.
                         |__vertical bristle 2 35 rec.
                         |__vertical bristle 3
                         |__vertical bristle 4
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Is a adult head bristle
macrochaeta
Develops from presumptive vertical bristle
Part of vertex
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Synonyms
Secondary IDs
hide External Crossreferences & Linkouts
https://www.ento.csiro.au/biology/drosophila/melanogaster.html?vertical%20setae
VFB:FBbt_00004121