antennal segment 3 sense organ coeloconic sensillum of antennal segment 3 Olfactory coeloconic sensillum that is part of antennal segment 3 (Shanbhag et al., 1999). It has a double cuticular wall surrounding a central lumen that houses olfactory receptor neuron dendrites (Shanbhag et al., 1999). Its base is smooth, but distally it its is composed of cuticular fingers, between which run longitudinal grooves (Shanbhag et al., 1999). In the distal part of the sensillum, the central lumen is connected to the longitudinal grooves by radial spoke channels (Shanbhag et al., 1999). antennal coeloconic sensillum ac Not truly 'coeloconic' as these are not located in pits (Shanbhag et al., 1999). fly_anatomy.ontology sensillum coeloconicum of antennal segment 3 FBbt:00004177 VFB:FBbt_00004177 olfactory sensory organ eo-type sensillum adult antennal sensillum