FB2026_03 , released September 17, 2026
CV Term Report
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Term adult hygrosensory neuron Ir40a ID (Ontology) FBbt:00110990 (Fly Anatomy)
Definition Adult hygrosensory neuron that expresses the humidity-sensing Ionotropic receptor (Ir) 40a, and the co-receptors Ir93a and Ir25a, and responds to dry air (Silbering et al., 2011; Enjin et al, 2016; Knecht et al., 2016). There are a few different subtypes, innervating either the antennal lobe VP1d or VP4 glomeruli (Silbering et al., 2011; Marin et al., 2020) and having dendrites in either the basiconic sensilla of chamber I or the blunt-tipped sensilla of chamber II of the sacculus (pore-less sensilla) (Enjin et al., 2016; Marin et al., 2020).[ FlyBase:FBrf0206496 FlyBase:FBrf0215822 FlyBase:FBrf0232388 FlyBase:FBrf0233685 FlyBase:FBrf0246456 ]
Also Known As"ionotropic receptor neuron Ir40a" ; "Ir40a" ; "ORN Ir40a" (for all, see Synonyms field below)
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VFB:FBbt_00110990
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 adult hygrosensory neuron Ir40a (all annotations which use CV term, excluding "NOT" statements)
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nervous system
 |__peripheral nervous system____________
sensory neuron                           |
 |__hygrosensory neuron__________________|
 |__external sense organ sensory neuron__|
sensory organ cell                       |
 |__external sense organ sensory neuron__|
organ system subdivision                 |
 |__peripheral nervous system____________|
adult antennal sensory neuron            |
 |__adult antennal lobe receptor neuron__|
PNS neuron                               |
 |__external sense organ sensory neuron__|
hygrosensory system neuron               |
 |__hygrosensory neuron__________________|
                                         adult hygrosensory neuron Ir40a  8 rec.
                                          |__adult hygrosensory neuron Ir40a VP1d
                                          |__adult hygrosensory neuron Ir40a VP4 4 rec.
                                              |__adult hygrosensory neuron Ir40a VP4 chamber I
                                              |__adult hygrosensory neuron Ir40a VP4 chamber II
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Is a hygrosensory neuron
adult antennal lobe receptor neuron
external sense organ sensory neuron
Part of peripheral nervous system
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Synonyms
  • "adult olfactory receptor neuron Ir40a" RELATED
    "ionotropic receptor neuron Ir40a" EXACT
    "Ir40a" EXACT[ FlyBase:FBrf0215822 ]
    "ORN Ir40a" EXACT
    "ORN sacI" EXACT
    "OSN Ir40a" EXACT[ FlyBase:FBrf0215822 ]
Secondary IDs
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VFB:FBbt_00110990