basiconic sensillum of antennal segment 3 antennal basiconic sensillum ab4 fly_anatomy.ontology antennal basiconic sensillum TB-2 This is the only type of 'thin' basiconic sensillum listed in Benton et al. (2025) comprehensive analysis. VFB:FBbt_00067004 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). thin basiconic sensillum of antennal segment 3 FBbt:00067004