FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term antennal intermediate sensillum ai3 ID (Ontology) FBbt:00067000 (Fly Anatomy)
Definition Olfactory intermediate sensillum of antennal segment 3 that houses the dendrites of three olfactory receptor neurons, expressing Or2a, Or19a and Or43a (Grabe et al., 2016).[ FlyBase:FBrf0187305 FlyBase:FBrf0224383 FlyBase:FBrf0229748 FlyBase:FBrf0239032 ]
Also Known As"antennal intermediate sensillum I3" ; "antennal trichoid sensillum at3" ; "I-3 sensillum"
CommentReclassified from trichoid to intermediate by fluorescence-guided single sensillum recording (FG-SSR) (Lin and Potter, 2015; https://orcid.org/0000-0002-1373-1705). Dweck et al. (2013) - FBrf0223680 refer to this as ai2, but show presence of three neurons with one expressing Or19a.
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VFB:FBbt_00067000
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Alleles (FBal)PHENOTYPE_MANIFEST_IN
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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 antennal intermediate sensillum ai3 (all annotations which use CV term, excluding "NOT" statements)
     antennal intermediate sensillum ai3 | increased number
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antennal segment 3 sense organ__
olfactory sensory organ_________|
intermediate sensillum__________|
adult antennal sensillum________|
                                intermediate sensillum of antennal segment 3
                                 |__antennal intermediate sensillum ai3  9 rec.
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Is a intermediate sensillum of antennal segment 3
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VFB:FBbt_00067000