FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term trichoid sensillum ID (Ontology) FBbt:00005184 (Fly Anatomy)
Definition A sensillum of which the external part is a seta.[ FlyBase:FBrf0111704 FlyBase:FBrf0239230 ]
Also Known As"sensillum trichodeum"
CommentNote that there is some variation in usage of this term throughout entomology, with some sources using it to refer to any sensillum with a hair or bristle cuticular specialization (e.g. see Chapman, 1998 FBrf0239230). Among the Dmel model organism community it is only used for the smallest of hairs/bristle, with sensilla with larger, thicker cuticular specializations being referred to as chaetae. We follow this usage. It should be noted, however, that there is no clear dividing line between macrochaeta and microchaeta or between microchaeta and trichoid sensillum.
Links to External Ontologies
VFB:FBbt_00005184
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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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Relevant FlyBase reports
 Alleles Images Insertions Constructs
 trichoid sensillum (all annotations which use CV term, excluding "NOT" statements)
     trichoid sensillum | ectopic | somatic clone
      --       --       --
     trichoid sensillum | increased number
      --       --
     trichoid sensillum | second instar larval stage
      --       --       --
     trichoid sensillum | third instar larval stage
      --       --       --
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Vocabulary search 
  external sensillum
   |__eo-type sensillum
       |__trichoid sensillum  254 rec.
           |__abdominal 8 dorsal trichoid sensillum DMSOh 4 rec.
           |__abdominal 9 dorsal trichoid sensillum ALSOh 2 rec.
           |__abdominal dorsal trichoid sensillum dh1 1 rec.
           |   |__abdominal 1 dorsal trichoid sensillum dh1
           |   |__abdominal 2 dorsal trichoid sensillum dh1
           |   |__abdominal 3 dorsal trichoid sensillum dh1
           |   |__abdominal 4 dorsal trichoid sensillum dh1
           |   |__abdominal 5 dorsal trichoid sensillum dh1
           |   |__abdominal 6 dorsal trichoid sensillum dh1
           |   |__abdominal 7 dorsal trichoid sensillum dh1
           |__abdominal dorsal trichoid sensillum dh2
           |   |__abdominal 1 dorsal trichoid sensillum dh2
           |   |__abdominal 2 dorsal trichoid sensillum dh2
           |   |__abdominal 3 dorsal trichoid sensillum dh2
           |   |__abdominal 4 dorsal trichoid sensillum dh2
           |   |__abdominal 5 dorsal trichoid sensillum dh2
           |   |__abdominal 6 dorsal trichoid sensillum dh2
           |   |__abdominal 7 dorsal trichoid sensillum dh2
           |__abdominal lateral trichoid sensillum lh1 3 rec.
           |   |__abdominal 1 lateral trichoid sensillum lh1 2 rec.
           |   |__abdominal 2 lateral trichoid sensillum lh1 2 rec.
           |   |__abdominal 3 lateral trichoid sensillum lh1 1 rec.
           |   |__abdominal 4 lateral trichoid sensillum lh1 1 rec.
           |   |__abdominal 5 lateral trichoid sensillum lh1 1 rec.
           |   |__abdominal 6 lateral trichoid sensillum lh1 1 rec.
           |   |__abdominal 7 lateral trichoid sensillum lh1 1 rec.
           |__abdominal lateral trichoid sensillum lh2 3 rec.
           |   |__abdominal 1 lateral trichoid sensillum lh2 2 rec.
           |   |__abdominal 2 lateral trichoid sensillum lh2 2 rec.
           |   |__abdominal 3 lateral trichoid sensillum lh2 1 rec.
           |   |__abdominal 4 lateral trichoid sensillum lh2 1 rec.
           |   |__abdominal 5 lateral trichoid sensillum lh2 1 rec.
           |   |__abdominal 6 lateral trichoid sensillum lh2 1 rec.
           |   |__abdominal 7 lateral trichoid sensillum lh2 1 rec.
           |__capitellum trichoid sensillum 3 rec.
           |__hypogynial short bristle 1 rec.
           |__larval trichoid sensillum of anal sense organ
           |__maxillary palp bristle 17 rec.
           |__mesothoracic coxal trichoid sensillum 3 rec.
           |   |__mesothoracic coxal trichoid sensillum St4
           |   |__mesothoracic coxal trichoid sensillum St8
           |__mesothoracic dorsal trichoid sensillum dh1 2 rec.
           |__mesothoracic dorsal trichoid sensillum dh2 2 rec.
           |__mesothoracic lateral trichoid sensillum lh1 1 rec.
           |__mesothoracic tibial trichoid sensillum 1 rec.
           |__mesothoracic trochanter trichoid sensillum
           |   |__mesothoracic trochanter trichoid sensillum 2GSt
           |   |__mesothoracic trochanter trichoid sensillum St1
           |   |__mesothoracic trochanter trichoid sensillum St5
           |__metathoracic coxal trichoid sensillum 4 rec.
           |   |__metathoracic coxal trichoid sensillum St4
           |   |__metathoracic coxal trichoid sensillum St8
           |__metathoracic dorsal trichoid sensillum dh1 1 rec.
           |__metathoracic dorsal trichoid sensillum dh2 1 rec.
           |__metathoracic lateral trichoid sensillum lh1 1 rec.
           |__metathoracic tibial trichoid sensillum 1 rec.
           |__metathoracic trochanter trichoid sensillum
           |   |__metathoracic trochanter trichoid sensillum 2GSt
           |   |__metathoracic trochanter trichoid sensillum St1
           |   |__metathoracic trochanter trichoid sensillum St5
           |__notal microchaeta 59 rec.
           |__postgenal trichoid sensillum 3 rec.
           |__postoccipital trichoid sensillum 2 rec.
           |__prothoracic coxal trichoid sensillum 5 rec.
           |   |__prothoracic coxal trichoid sensillum St3 1 rec.
           |   |__prothoracic coxal trichoid sensillum St4 1 rec.
           |   |__prothoracic coxal trichoid sensillum St8 1 rec.
           |__prothoracic dorsal trichoid sensillum dh1 2 rec.
           |__prothoracic dorsal trichoid sensillum dh2 2 rec.
           |__prothoracic lateral trichoid sensillum lh1 2 rec.
           |__prothoracic tibial trichoid sensillum 2 rec.
           |__prothoracic trochanter trichoid sensillum 2 rec.
           |   |__prothoracic trochanter trichoid sensillum 2GSt 1 rec.
           |   |__prothoracic trochanter trichoid sensillum St1 1 rec.
           |   |__prothoracic trochanter trichoid sensillum St5 1 rec.
           |__rostral trichoid sensillum 2 rec.
           |   |__distal rostral sensillum 1 rec.
           |   |__proximal rostral sensillum 2 rec.
           |__spiracular hair 20 rec.
           |   |__spiracular hair 1
           |   |__spiracular hair 2
           |   |__spiracular hair 3
           |   |__spiracular hair 4
           |__trichoid sensillum of antennal segment 3 94 rec.
           |   |__antennal trichoid sensillum at1 15 rec.
           |   |__antennal trichoid sensillum at4(+) 21 rec.
           |__trichoid sensillum of cervical membrane of prothoracic leg
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Is a eo-type sensillum
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Synonyms
  • "hair sensillum" RELATED
    "sensillum trichodeum" EXACT
Secondary IDs
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VFB:FBbt_00005184