Substrate vibration sensitivity of the leg scolopidial organs in the green lacewing, Chrysoperla carnea

The threshold sensitivity of the leg-vibration receptors of the green lacewing, Chrysoperla carnea, was investigated electro-physiologically. The legs were stimulated by sinusoidal vibrations. Summed responses from the leg nerve fibres of different legs do not differ much. In each leg there are two...

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Bibliographic Details
Published in:Journal of insect physiology 1997-05, Vol.43 (5), p.433-437
Main Authors: Devetak, Dušan, Amon, Tomaž
Format: Article
Language:English
Subjects:
Campaniform sensilla
Chrysoperla carnea
Scolopidial organs
Subgenual organ
Substrate vibration
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Summary:The threshold sensitivity of the leg-vibration receptors of the green lacewing, Chrysoperla carnea, was investigated electro-physiologically. The legs were stimulated by sinusoidal vibrations. Summed responses from the leg nerve fibres of different legs do not differ much. In each leg there are two scolopidial organs which respond to vibration. The most sensitive—the subgenual organ—shows maximum sensitivity in the frequency range 1.5–2 kHz and a displacement threshold near 0.2 nm, corresponding to an acceleration of about 0.03 ms −2. The other is the femoral chordotonal organ with maximum sensitivity at about 1 kHz and the threshold between 0.1 and 1 ms −2. After ablation of both scolopidial organs, only responses of non-scolopidial organs persist, very probably campaniform sensilla.
ISSN:0022-1910
1879-1611
DOI:10.1016/S0022-1910(96)00121-7