FB2026_03 , released September 17, 2026

CV Term Report

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General Information

Term

bitter-sensing neuron of labellar taste bristle

ID (Ontology)

FBbt:00048152 (Fly Anatomy)

Definition

Gustatory receptor neuron of the labellum that responds to bitter stimuli and innervates a bitter-sensitive (short or intermediate) taste bristle. All of these cells express Gr66a, usually in combination with Gr32a, Gr33a and Gr89a (Weiss et al., 2011). Some of them also respond to high, aversive concentrations of salts (Liman et al., 2014; Freeman and Dahanukar, 2015; Jaeger et al., 2018). A subset also express TRPA1 and respond to hydrogen peroxide (Guntur et al., 2017).[ FlyBase:FBrf0212834 FlyBase:FBrf0229299 FlyBase:FBrf0229608 FlyBase:FBrf0234674 FlyBase:FBrf0240353 FlyBase:FBrf0248270 ]

Also Known As

"bitter-sensing neuron of the labellum" ; "Gr66a neuron of the labellum" ; "labellar taste bristle type B gustatory receptor neuron" (for all, see Synonyms field below)

Comment

Links to External Ontologies

VFB:FBbt_00048152

Annotations

Records annotated with this term OR any of its CHILD TERMS

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Direct annotations: records annotated with this exact term (child terms are NOT included)

Data Class	Field	Direct annotations
Alleles (FBal)	PHENOTYPE_MANIFEST_IN
Insertions (FBti)	EXPRESSION_STAGE_TISSUE_POSITION
Insertions (FBti)	PHENOTYPE_MANIFEST_IN

Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records

Full annotation statements	Relevant FlyBase reports
Full annotation statements	Alleles		Insertions	Constructs
bitter-sensing neuron of labellar taste bristle (all annotations which use CV term, excluding "NOT" statements)

Spanning Tree (Parents/Children)

labellar taste bristle sensory neuron
 |__labellar taste bristle chemosensory neuron__
high salt/bitter-sensing neuron                 |
 |__bitter-sensing neuron_______________________|
gustatory receptor neuron of the labellum       |
 |__labellar taste bristle chemosensory neuron__|
                                                bitter-sensing neuron of labellar taste bristle  15 rec.
                                                 |__broad bitter-sensing neuron of the labellum S-a 1 rec.
                                                 |__broad bitter-sensing neuron of the labellum S-b 2 rec.
                                                 |__narrow bitter-sensing neuron of the labellum I-a 1 rec.
                                                 |__narrow bitter-sensing neuron of the labellum I-b

Spanning Tree View Settings
Parents/Children View Depth	Show hierarchy levels: for parents, for children
Relationships
Is a	bitter-sensing neuron labellar taste bristle chemosensory neuron
Part of
Synonyms & Secondary IDs
Synonyms
	"bitter-sensing neuron of the labellum" EXACT "Gr66a neuron of the labellum" EXACT "labellar taste bristle type B gustatory receptor neuron" EXACT[ FlyBase:FBrf0248270 ] "type B GRN of labellum" EXACT[ FlyBase:FBrf0248270 ]
Secondary IDs

External Crossreferences & Linkouts
	FlyBrain_NDB:10381 VFB:FBbt_00048152