small basiconic sensillum of antennal segment 3 obsolete small basiconic sensillum true Obsoleted as these only seem to be described in the antenna, making this equivalent to FBbt:00004176 'small basiconic sensillum of antennal segment 3' fly_anatomy.ontology FBbt:00005186 small sensillum basiconicum The smallest subtype of basiconic sensilla. It measures around 9 micrometers in length and around 1.7 micrometers in width at the base. It shows slight tapering towards the tip. The cuticular wall is 100-200nm thick and contains pores or around 40nm wide. Except for the base, the pores are arranged in longitudinal rows, with 80nm between pores and 200nm between parallel rows. It is innervated by two sensory neurons. Small basiconic sensillum are found in the antennal segment 3. short s. basiconica short sensilla basiconica