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sabato 25 novembre 2017

# behav: a new dead leaf camouflage strategy with orange spots and unexpected preserved resonance (T. spurioculis)

AA << study the wing mechanics and resonances of Typophyllum spurioculis, a new species of leaf-mimic katydid >>

<< This species performs an unusual laterally directed aposematic display, showing orange spots that simulate eyes at the leg base. At night, males are conspicuous by their loud, audible calling songs, which exhibit two spectral peaks at ca. 7 and 12 kHz >>

AA << find the effective sound radiators of the wings (speculae) vibrate with three modes of vibration, two of which include the frequencies observed in the calling song. Remarkably, this resonance is preserved in the parts of the wings mimicking necrotic leaves, which are in theory not specialised for sound production >>

Andrew Baker, Fernando Montealegre-Z, et al. Wing resonances in a new dead-leaf-mimic katydid (Tettigoniidae: Pterochrozinae) from the Andean cloud forests. Zoologischer Anzeiger - A Journal of Comparative Zoology. 2017; 270: 60-70.

http://www.sciencedirect.com/science/article/pii/S0044523117300748

Cerri Evans. New insect species mimics dead leaves for camouflage
Nov 13, 2017

https://m.phys.org/news/2017-11-insect-species-mimics-dead-camouflage.html

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