@article {50518, title = {Sounds, Behaviour, and Auditory Receptors of the Armoured Ground Cricket, Acanthoplus longipes}, journal = {Journal of Insect Science}, volume = {10}, year = {2010}, month = {Jan-06-2010}, pages = {1 - 15}, abstract = {

The auditory sensory system of the taxon Hetrodinae has not been studied previously. Males of the African armoured ground cricket, Acanthoplus longipes (Orthoptera: Tettigoniidae: Hetrodinae) produce a calling song that lasts for minutes and consists of verses with two pulses. About three impulses are in the first pulse and about five impulses are in the second pulse. In contrast, the disturbance stridulation consists of verses with about 14 impulses that are not separated in pulses. Furthermore, the inter-impulse intervals of both types of sounds are different, whereas verses have similar durations. This indicates that the neuronal networks for sound generation are not identical. The frequency spectrum peaks at about 15 kHz in both types of sounds, whereas the hearing threshold has the greatest sensitivity between 4 and 10 kHz. The auditory afferents project into the prothoracic ganglion. The foreleg contains about 27 sensory neurons in the crista acustica; the midleg has 18 sensory neurons, and the hindleg has 14. The auditory system is similar to those of other Tettigoniidae.

}, keywords = {calling song, courtship behaviour, disturbance sound, hearing system, scolopidial organ, sensory physiology}, issn = {1536-2442}, doi = {10.1673/031.010.5901}, url = {https://academic.oup.com/jinsectscience/article-lookup/doi/10.1673/031.010.5901https://academic.oup.com/jinsectscience/article/843007/Sounds-behaviour-and-auditory-receptors-of-the}, author = {Kowalski, Kerstin and Lakes-Harlan, Reinhard} } @article {11176, title = {True Katydids (Pseudophyllinae) from Guadeloupe: Acoustic Signals and Functional Considerations of Song Production}, journal = {Journal of Insect Science}, volume = {13}, year = {2013}, month = {Jan-12-2013}, pages = {1 - 16}, abstract = {

Guadeloupe, the largest of the Leeward Islands, harbors three species of Pseudophyllinae (Orthoptera: Tettigoniidae) belonging to distinct tribes. This study examined the basic aspects of sound production and acousto-vibratory behavior of these species. As the songs of many Pseudophyllinae are complex and peak at high frequencies, they require high quality recordings. Wild specimens were therefore recorded ex situ. Collected specimens were used in structure-function experiments. Karukerana aguilari Bonfils (Pterophyllini) is a large species with a mirror in each tegmen and conspicuous folds over the mirror. It sings 4\–6 syllables, each comprising 10\–20 pulses, with several peaks in the frequency spectrum between 4 and 20 kHz. The song is among the loudest in Orthoptera (\> 125 dB SPL in 10 cm distance). The folds are protective and have no function in song production. Both mirrors may work independently in sound radiation. Nesonotus reticulatus (Fabricius) (Cocconotini) produces verses from two syllables at irregular intervals. The song peaks around 20 kHz. While singing, the males often produce a tremulation signal with the abdomen at about 8\–10 Hz. To our knowledge, it is the first record of simultaneous calling song and tremulation in Orthoptera. Other males reply to the tremulation with their own tremulation. Xerophyllopteryx fumosa (Brunner von Wattenwyl) (Pleminiini) is a large, bark-like species, producing a syllable of around 20 pulses. The syllables are produced with irregular rhythms (often two with shorter intervals). The song peaks around 2\–3 kHz and 10 kHz. The hind wings are relatively thick and are held between the half opened tegmina during singing. Removal of the hind wings reduces song intensity by about 5 dB, especially of the low frequency component, suggesting that the hind wings have a role in amplifying the song.

}, keywords = {bioacoustics, bush-cricket, stridulation}, issn = {1536-2442}, doi = {10.1673/031.013.15701}, url = {http://www.bioone.org/doi/abs/10.1673/031.013.15701}, author = {Stumpner, Andreas and Dann, Angela and Schink, Matthias and Gubert, Silvia and Hugel, Sylvain} }