sensillum of sacculus chamber II obsolete blunt-tipped sensillum https://github.com/FlyBase/drosophila-anatomy-developmental-ontology/issues/1312 true Obsoleted as these only seem to exist in the sacculus, making this term equivalent to FBbt:00004183 'sensillum of sacculus chamber II'. Sensillum of the coeloconic type that does not have a pore. It is 2 micrometers long and 1.7 micrometers wide at the base, tapering towards the tip. A pore-like structure at the distal end is plugged by electron-dense material. At the very tip, the sensillum is covered by a similar electron-dense structure. The outer cuticular surface is smooth. Internally, the cuticle has a spongy appearance. There is a single central lumen that terminates below the electron-dense layer. FBbt:00005192 fly_anatomy.ontology