Chordotonal organ

Japanese: 弦音器官 - げんおんきかん（英語表記）chordotonal organ

Chordotonal organs are a type of insect mechanoreceptor that are located under the body wall, with their tips attached to one part of the body wall and their afferent side attached to another part, and are a collection of sensory elements stretched out like a string. Chordotonal organs include the tympanal organ, an auditory organ unique to insects. In addition to the tympanal organ, other chordotonal organs consisting of a relatively small number of sensory elements are located near the joints of the body, such as the antennae and legs, and act as proprioceptors, although some detect wing movement. In addition to the tympanal organ, other chordotonal organs consisting of a large number of sensory elements include the subgenual organ and Johnston's organ.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

昆虫の機械受容器の一種で，体壁下にあって先端を体壁の一部に，求心側を他の部分に付着させ，弦のように張りめぐらされた感覚子が集まったものを弦音器官という。弦音器官には昆虫特有の聴覚器官である鼓膜器官tympanal organも含まれる。鼓膜器官以外には，比較的少数の感覚子からなる弦音器官が触角や足などの体の関節近くにあり自己受容器として働くが，羽の動きを受容するものもある。多数の感覚子が集まってできた弦音器官としては，鼓膜器官のほかに膝下（しつか）器官subgenual organ，ジョンストン器官Johnston’s organがある。

出典　株式会社平凡社世界大百科事典第２版について　情報

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