Functions of Chordotonal Sensilla in Bushcrickets (Orthoptera, Tettigoniidae)

Abstract Acoustic and vibrational sensitivity of single identified auditory receptors in bushcrickets was studied by electrophysiological methods. In the intermediate organ, some neurons were whose response to acceleration did not depend on stimulus frequency over a significant range; along with them, there cells showing increased frequencies 0.4–0.8 kHz for displacement, and/or 0.1–0.3, 1–1.2, 1.4–3 all vibration parameters. addition, most had zone highfrequency vibrations at 1.5–2.5 kHz. sensilla crista acustica, recorded 0.4–0.8, 1.4–2.5 The best sensillum may lie different ranges Such differences acceleration, velocity, also organ acustica probably determined size, position, morphological details sensilla, their own resonances, reactions resonance trachea section bearing vibroreceptors. Thus, chordotonal is bifunctional mechanoreceptor which, sensitivity, can combine functions both displacement receiver an accelerometer due mechanical properties its surrounding structures.