FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term large labellar taste bristle ID (Ontology) FBbt:00007411 (Fly Anatomy)
Definition Largest of the three main labellar taste bristle types, it is approximately 35 micrometres long (Shanbhag et al., 2001). These taste bristles contain the sensory dendrites of four gustatory receptor neurons (Shanbhag et al., 2001), with mostly invariant receptor expression (Weiss et al., 2011; Jaeger et al., 2018), and one mechanosensory neuron (Shanbhag et al., 2001). The gustatory neurons can respond to sugars, salt and water (Meunier et al., 2003; Fujishiro et al., 1984). Large taste bristles do not respond to bitter stimuli and their gustatory receptor neurons do not express the bitter receptor Gr66a (Weiss et al., 2011).[ FlyBase:FBrf0041338 FlyBase:FBrf0137194 FlyBase:FBrf0152351 FlyBase:FBrf0160792 FlyBase:FBrf0212834 FlyBase:FBrf0240353 ]
Also Known As"L-type sensillum" ; "long labellar taste bristle" ; "lTB"
CommentShanbhag et al. (2001) report that there are between 7 and 9 L-type sensilla, whilst Hiroi et al. (2002), Weiss et al. (2011) and Jaeger et al. (2018) all show 9. Positions are relatively consistent between studies (6 in a relatively medial row, 3 in a relatively lateral row), despite two different numbering schemes.
Links to External Ontologies
VFB:FBbt_00007411
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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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 Alleles Insertions Constructs
 large labellar taste bristle (all annotations which use CV term, excluding "NOT" statements)
     large labellar taste bristle | adult stage
      --
     large labellar taste bristle | heat sensitive
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adult head bristle
 |__labellar taste bristle__
adult labellum sensillum    |
 |__labellar taste bristle__|
labellum                    |
 |__labellar cap____________|
taste bristle               |
 |__labellar taste bristle__|
mechanosensory chaeta       |
 |__labellar taste bristle__|
anatomical structure        |
 |__labellar cap____________|
                            large labellar taste bristle  81 rec.
                             |__L-type sensillum L1 13 rec.
                             |__L-type sensillum L2 18 rec.
                             |__L-type sensillum L3 15 rec.
                             |__L-type sensillum L4 17 rec.
                             |__L-type sensillum L5 13 rec.
                             |__L-type sensillum L6 10 rec.
                             |__L-type sensillum L7 14 rec.
                             |__L-type sensillum L8 7 rec.
                             |__L-type sensillum L9 7 rec.
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Is a labellar taste bristle
Part of labellar cap
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VFB:FBbt_00007411