FB2026_03 , released September 17, 2026
CV Term Report
Help Close All Open All
General Information
Term adult hygrosensory neuron Ir40a VP4 ID (Ontology) FBbt:00047225 (Fly Anatomy)
Definition Adult hygrosensory neuron that expresses the humidity-sensing Ionotropic receptor (Ir) 40a, and the co-receptors Ir93a and Ir25a and innervates the antennal lobe glomerulus VP4 bilaterally (Enjin et al, 2016; Knecht et al., 2016; Marin et al., 2020). There are two subtypes that transduce signals from the basiconic sensilla of chamber I or the blunt-tipped sensilla of chamber II (pore-less sensilla) of the sacculus (Enjin et al., 2016; Marin et al., 2020). Its activity is increased by dry air and decreased by humid air (Knecht et al., 2016; Enjin et al., 2016). It develops from an Nba precursor (Benton et al., 2025). There are around 15 of these cells on each side (Benton et al., 2025).[ FlyBase:FBrf0206496 FlyBase:FBrf0215822 FlyBase:FBrf0232388 FlyBase:FBrf0233685 FlyBase:FBrf0246456 FlyBase:FBrf0262710 ]
Also Known As"HRN_VP4" ; "VP4RN"
Comment
Links to External Ontologies
VFB:FBbt_00047225
Annotations
Records annotated with this term OR any of its CHILD TERMS

Choose a record type to view annotations for this term and its child terms. Direct annotations and full annotation statements below also provide HitList buttons.

    • Results list data from multiple species. Choose a record type above to open its HitList.
Direct annotations: records annotated with this exact term (child terms are NOT included)
There are no annotations using this term.
show Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
 Full annotation statements 
Relevant FlyBase reports
 Genes Constructs
 adult hygrosensory neuron Ir40a VP4 (all annotations which use CV term, excluding "NOT" statements)
Spanning Tree (Parents/Children)
Only view relationship:
Vocabulary search 
peripheral nervous system
 |__adult hygrosensory neuron Ir40a__________
hygrosensory neuron                          |
 |__adult hygrosensory neuron Ir40a__________|
adult antennal lobe receptor neuron          |
 |__bilateral antennal lobe receptor neuron__|
 |__adult hygrosensory neuron Ir40a__________|
external sense organ sensory neuron          |
 |__adult hygrosensory neuron Ir40a__________|
                                             adult hygrosensory neuron Ir40a VP4  4 rec.
                                              |__adult hygrosensory neuron Ir40a VP4 chamber I
                                              |__adult hygrosensory neuron Ir40a VP4 chamber II
Spanning Tree View Settings
Parents/Children
View Depth
Show hierarchy levels: for parents, for children
hide Relationships
Is a bilateral antennal lobe receptor neuron
adult hygrosensory neuron Ir40a
Develops from antennal olfactory receptor neuron precursor Nba
Part of
hide Synonyms & Secondary IDs
Synonyms
  • "adult olfactory receptor neuron Ir40a VP4" RELATED
    "HRN_VP4" EXACT VFB_SYMBOL
    "VP4RN" EXACT[ FlyBase:FBrf0246456 ]
Secondary IDs
hide External Crossreferences & Linkouts
VFB:FBbt_00047225