basiconic sensillum of antennal segment 3 small basiconic sensillum of antennal segment 3 VFB:FBbt_00004176 Small olfactory basiconic sensillum of antennal segment 3, measuring around 9 micrometers in length and around 1.7 micrometers in width at the base, with slight tapering towards the tip (Shanbhag et al., 1999). The surface of the sensillum is perforated by longitudinal rows of pores, connecting to a lymph space innervated by 2 branched olfactory receptor neuron dendrites (Shanbhag et al., 1999). FBbt:00004176 short sensillum basiconicum fly_anatomy.ontology small sensillum basiconicum of antennal segment 3 olfactory sensory organ