FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term intermediate labellar taste bristle ID (Ontology) FBbt:00007412 (Fly Anatomy)
Definition Labellar bristle that is approximately 25 micrometers long (Shanbhag et al., 2001). These taste bristles house the sensory dendrites of 2 gustatory receptor neurons (Shanbhag et al., 2001), one sensitive to sugars and low concentrations of salt and the other to bitter and high salt concentrations (Hiroi et al., 2004; Jaeger et al., 2018), and one mechanosensory neuron (Shanbhag et al., 2001).[ FlyBase:FBrf0137194 FlyBase:FBrf0180410 FlyBase:FBrf0240353 ]
Also Known As"I-type sensillum" ; "iTB"
CommentShanbhag et al. (2001) and Hiroi et al. (2002) claim there are between 9 and 10 I-type sensilla present. Number, position and identity (short v intermediate) of individual sensilla seems to vary between animals (Shanbhag et al., 2001; Hiroi et al., 2002; Weiss et al., 2011; Jaeger et al., 2018). May infrequently also house a glutamatergic ppk23 neuron (Jaeger et al., 2018).
Links to External Ontologies
VFB:FBbt_00007412
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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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 intermediate labellar taste bristle (all annotations which use CV term, excluding "NOT" statements)
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labellar taste bristle
 |__bitter-sensitive labellar taste bristle__
labellum                                     |
 |__labellar cap_____________________________|
anatomical structure                         |
 |__labellar cap_____________________________|
                                             intermediate labellar taste bristle  65 rec.
                                              |__intermediate labellar taste bristle I-a 18 rec.
                                              |__intermediate labellar taste bristle I-b 28 rec.
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Is a bitter-sensitive labellar taste bristle
Part of labellar cap
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VFB:FBbt_00007412