FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
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"
Comment Note 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
Annotations
Records annotated with this term OR any of its CHILD TERMS
Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Alleles (FBal)  PHENOTYPE_MANIFEST_IN      15
Insertions (FBti)  PHENOTYPE_MANIFEST_IN       1
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN       6
show Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
 Full annotation statements 
Relevant FlyBase reports
 Alleles Images Insertions Constructs
 trichoid sensillum (all annotations which use CV term, excluding "NOT" statements)      15     13      1     22
     trichoid sensillum | ectopic | somatic clone       1       --       --       --
     trichoid sensillum | increased number       3       --       --       3
     trichoid sensillum | second instar larval stage       1       --       --       --
     trichoid sensillum | third instar larval stage       1       --       --       --
Spanning Tree (Parents/Children)
Only view relationship:
  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