Johnston's organ is a collection of sensory cells found in the pedicel (the second segment) of the antennae in the class Insecta.[2] Johnston's organ detects motion in the flagellum (third and typically final antennal segment). It consists of scolopidia arrayed in a bowl shape, each of which contains a mechanosensory chordotonal neuron.[3][4] The number of scolopidia varies between species. In homopterans, the Johnston's organs contain 25–79 scolopidia.[5] The presence of Johnston's organ is a defining characteristic which separates the class Insecta from the other hexapods belonging to the group Entognatha. Johnston's organ was named after the physician Christopher Johnston (1822-1891)[6] father of the physician and Assyriologist Christopher Johnston.
- ^ Johnston C (April 1855). "Auditory apparatus of the Culex mosquito". Journal of Cell Science. 3 (10): 97–102. doi:10.1242/jcs.s1-3.10.97.
- ^ Kamikouchi A, Inagaki HK, Effertz T, Hendrich O, Fiala A, Göpfert MC, et al. (March 2009). "The neural basis of Drosophila gravity-sensing and hearing". Nature. 458 (7235): 165–171. Bibcode:2009Natur.458..165K. doi:10.1038/nature07810. PMID 19279630. S2CID 1171792.
- ^ Göpfert MC, Robert D (May 2002). "The mechanical basis of Drosophila audition". The Journal of Experimental Biology. 205 (Pt 9): 1199–1208. doi:10.1242/jeb.205.9.1199. PMID 11948197.
- ^ Yack JE (April 2004). "The structure and function of auditory chordotonal organs in insects". Microscopy Research and Technique. 63 (6): 315–337. doi:10.1002/jemt.20051. PMID 15252876. S2CID 16942117.
- ^ Rossi Stacconi MV, Romani R (May 2013). "The Johnston's organ of three homopteran species: a comparative ultrastructural study". Arthropod Structure & Development. 42 (3): 219–228. Bibcode:2013ArtSD..42..219R. doi:10.1016/j.asd.2013.02.001. PMID 23428838.
- ^ Johnston C (1855). "Auditory Apparatus of the Culex Mosquito" (PDF). Quarterly Journal of Microscopical Science. 3: 97–102.