FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term interommatidial bristle ID (Ontology) FBbt:00004133 (Fly Anatomy)
Definition Small mechanosensory hair found between ommatidia of the adult eye (Ready et al., 1976). There are around 600-650 of these per eye (Eichler et al., 2024) and they are usually found at the anterior ends of each of the two horizontal faces of each (hexagonal) ommatidium (Ready et al., 1976). Their placement is less regular towards the anterior region of the eye and they are not usually found around the edges of the eye (Ready et al., 1976).[ FlyBase:FBrf0028544 FlyBase:FBrf0064798 FlyBase:FBrf0259346 ]
Also Known As"eye bristle" ; "InOm bristle" ; "interfacetal bristle"
Comment
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VFB:FBbt_00004133
Annotations
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Direct annotations: records annotated with this exact term (child terms are NOT included)
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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 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes Images Insertions Constructs
 interommatidial bristle (all annotations which use CV term, excluding "NOT" statements)
     interommatidial bristle | absent
      --       --
     interommatidial bristle | absent | adult stage
      --       --       --
     interommatidial bristle | adult stage
      --       --       --
     interommatidial bristle | adult stage | decreased number
      --       --       --
     interommatidial bristle | adult stage | ectopic
      --       --       --
     interommatidial bristle | adult stage | increased number
      --       --       --
     interommatidial bristle | adult stage | somatic clone
      --       --       --       --
     interommatidial bristle | chemical conditional
      --       --       --
     interommatidial bristle | clone of cells
      --       --       --       --
     interommatidial bristle | cold sensitive
      --       --       --
     interommatidial bristle | decreased number
      --       --
     interommatidial bristle | ectopic
      --       --
     interommatidial bristle | ectopic | pupal stage
      --       --       --
     interommatidial bristle | ectopic | somatic clone
      --       --
      --
     interommatidial bristle | female limited
      --       --       --
     interommatidial bristle | heat sensitive
      --       --
     interommatidial bristle | increased number
      --       --       --
     interommatidial bristle | increased number | drug conditional
      --       --       --
     interommatidial bristle | increased number | heat sensitive
      --       --       --
     interommatidial bristle | maternal effect
      --       --       --       --
     interommatidial bristle | P-stage
      --       --       --
     interommatidial bristle | pharate adult stage
      --       --
      --
     interommatidial bristle | pharate adult stage | increased number
      --       --       --       --
     interommatidial bristle | pharate adult stage | somatic clone
      --       --       --       --
     interommatidial bristle | posterior
      --       --       --
     interommatidial bristle | progressive
      --       --       --
     interommatidial bristle | pupal stage
      --       --
     interommatidial bristle | pupal stage P6
      --       --       --
     interommatidial bristle | pupal stage P7
      --       --       --
     interommatidial bristle | pupal stage P7 | heat sensitive
      --       --       --       --
     interommatidial bristle | pupal stage P7 | somatic clone
      --       --       --       --
     interommatidial bristle | pupal stage | increased number
      --       --       --
     interommatidial bristle | pupal stage | somatic clone
      --       --
      --
     interommatidial bristle | pupal stage | somatic clone | increased number
      --       --       --       --
     interommatidial bristle | somatic clone
      --       --
     interommatidial bristle | somatic clone | heat sensitive
      --       --       --       --
     interommatidial bristle | somatic clone | increased number
      --       --       --       --
     interommatidial bristle | temperature conditional
      --       --
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adult head
 |__eye________________________
adult sense organ              |
 |__eye________________________|
photoreceptor                  |
 |__eye________________________|
chaeta                         |
 |__adult head bristle_________|
mechanosensory chaeta          |
 |__microchaeta________________|
external compound sense organ  |
 |__eye________________________|
adult sensillum                |
 |__microchaeta________________|
adult head sensillum           |
 |__adult head bristle_________|
anterior ectoderm derivative   |
 |__eye________________________|
ventral ectoderm derivative    |
 |__eye________________________|
                               interommatidial bristle  1135 rec.
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Is a adult head bristle
microchaeta
Part of eye
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VFB:FBbt_00004133