FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term antennal basiconic sensillum ab4 ID (Ontology) FBbt:00067004 (Fly Anatomy)
Definition Antennal basiconic sensillum innervated by the dendrites of two olfactory receptor neurons, expressing Or56a and Or7a (Couto et al., 2005; Gonzales et al., 2021). It is about the same length as the large ab sensilla, but more slender, and has longitudinal rows of pores like those found in the small ab sensilla (Shanbhag et al., 1999).[ FlyBase:FBrf0108493 FlyBase:FBrf0187305 FlyBase:FBrf0233453 FlyBase:FBrf0239032 FlyBase:FBrf0250923 FlyBase:FBrf0262710 ]
Also Known As"antennal basiconic sensillum TB-2" ; "thin basiconic sensillum of antennal segment 3"
CommentThis is the only type of 'thin' basiconic sensillum listed in Benton et al. (2025) comprehensive analysis.
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VFB:FBbt_00067004
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 antennal basiconic sensillum ab4 (all annotations which use CV term, excluding "NOT" statements)
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antennal segment 3 sense organ__
basiconic sensillum_____________|
adult antennal sensillum________|
                                basiconic sensillum of antennal segment 3
                                 |__antennal basiconic sensillum ab4  4 rec.
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Is a basiconic sensillum of antennal segment 3
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Synonyms
  • "antennal basiconic sensillum TB-2" EXACT[ FlyBase:FBrf0128642 ]
    "thin basiconic sensillum of antennal segment 3" EXACT
Secondary IDs
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VFB:FBbt_00067004