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Journal of Experimental Biology, Vol 200, Issue 19 2493-2500, Copyright © 1997 by Company of Biologists

JOURNAL ARTICLES

Defensive production of quinoline by a phasmid insect (Oreophoetes peruana)

T Eisner, RC Morgan, AB Attygalle, SR Smedley, KB Herath and J Meinwald
Section of Neurobiology and Behavior, Cornell University, Ithaca, NY 14853, USA.

Adults and nymphs of the Peruvian stick insect Oreophoetes peruana (order Phasmatodea) have a pair of thoracic glands from which they discharge a malodorous fluid when disturbed. The secretion contains a single volatile component, quinoline. Quinoline has not been reported previously from an animal source. The compound proved repellent or topically irritant in assays with ants, spiders, cockroaches and frogs. O. peruana nymphs, at molting, do not extricate the shed cuticular lining of the glands, thereby managing not to lose their secretory supply when they cast their skin. They are able, as a consequence, to discharge secretion even while still teneral after molting.
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© The Company of Biologists Ltd 1997