@article {58380, title = {Bioacoustics of poorly known Poecilimon taxa (Insecta: Orthoptera: Tettigoniidae) with redescriptions of P. pechevi and P. stschelkanovzevi}, journal = {Zootaxa}, volume = {4890}, year = {2020}, month = {Apr-12-2020}, pages = {535 - 553}, abstract = {

The genus Poecilimon has been object of several studies dealing with its systematics, sound communication and evolution. Yet, published data contradict in the classification, while many taxa are still insufficiently known. In the present study we supplement the knowledge of 13 poorly known species and one additional subspecies with data on their sound communication and/or morphology. Most species concerned here are classified within two acoustic groups. First group includes P. celebi, P. obtusicercus and P. toros, showing typical characteristics of the P. syriacus group. Second group is more heterogeneous. Among that, P. pechevi, P. armeniacus, P. harveyi, P. guichardi, P. haydari, P. doga, P. davisi and P. excisus present a song pattern similar to that of P. ampliatus. In addition, P. ataturki is also quite similar in basic song structure to the latter but differs in its fine song structure. Poecilimon stschelkanovzevi, with unclear relationships, is described morphologically in detail. The present study provides hints for solving some disagreement between recent revisions, proposing unification of the Poecilimon celebi with P. syriacus group and opening discussion based on close relationships of the groups ampliatus, armeniacus, davisi, luschani and the species P. guichardi on one hand, while the complex P. ataturki/glandifer shows significant differences on the other. The acoustic peculiarities of the ampliatus group allies are discussed in an evolutionary light.

}, keywords = {Barbitistini, bush-cricket, morphology, sound communication, sound production}, issn = {1175-5326}, doi = {10.11646/zootaxa.4890.410.11646/zootaxa.4890.4.6}, url = {https://www.biotaxa.org/Zootaxa/issue/view/zootaxa.4890.4https://www.biotaxa.org/Zootaxa/article/view/zootaxa.4890.4.6https://www.biotaxa.org/Zootaxa/article/viewFile/65904/64346}, author = {Dragan Petrov Chobanov and Sevgili, Hasan and Klaus-Gerhard Heller} } @article {51480, title = {Chamber music: an unusual Helmholtz resonator for song amplification in a Neotropical bush-cricket (Orthoptera, Tettigoniidae)}, journal = {The Journal of Experimental Biology}, volume = {220}, year = {2017}, month = {Sep-15-20172153}, pages = {2900 - 2907}, abstract = {

Animals use sound for communication, with high-amplitude signals being selected for attracting mates or deterring rivals. High amplitudes are attained by employing primary resonators in sound producing structures to amplify the signal (e.g., avian syrinx). Some species actively exploit acoustic properties of natural structures to enhance signal transmission by using these as secondary resonators (e.g., tree-hole frogs). Male bush-crickets produce sound by tegminal stridulation and often use specialised wing areas as primary resonators. Interestingly, Acanthacara acuta, a Neotropical bush-cricket, exhibits an unusual pronotal inflation, forming a chamber covering the wings. It has been suggested that such pronotal chambers enhance amplitude and tuning of the signal by constituting a (secondary) Helmholtz resonator. If true, the intact system \– when stimulated sympathetically with broadband sound \– should show clear resonance around the song carrier frequency which should be largely independent of pronotum material, and change when the system is destroyed. Using laser Doppler vibrometry on living and preserved specimens, micro computed tomography, 3D printed models, and finite element modelling, we show that the pronotal chamber not only functions as a Helmholtz resonator due to its intact morphology but also resonates at frequencies of the calling song on itself, making song production a three-resonator system.

}, keywords = {acoustic resonator, bioacoustics, bush-cricket, finite element modelling, laser Doppler vibrometry, micro computed tomography}, issn = {0022-0949}, doi = {10.1242/jeb.160234}, url = {http://jeb.biologists.org/lookup/doi/10.1242/jeb.160234}, author = {Jonsson, Thorin and Robson Brown, Kate and Sarria-S, Fabio A. and Walker, Matthew and Montealegre-Z, Fernando} } @article {51475, title = {Wing resonances in a new dead-leaf-mimic katydid (Tettigoniidae: Pterochrozinae) from the Andean cloud forests}, journal = {Zoologischer Anzeiger - A Journal of Comparative Zoology}, volume = {270}, year = {2017}, month = {Jan-09-2017}, pages = {60 - 70}, abstract = {

Day-camouflaged leaf-mimic katydids Typophyllum spp. have a remarkable way of evading predators as male and female forewings appear as bite-damaged leaves complete with necrotic spots. As in all other katydids, males produce sound signals to attract females by rubbing their forewings together. The biophysical properties of these special leaf-like forewings remain obscure. Here we study the wing mechanics and resonances of Typophyllum spurioculis, a new species of leaf-mimic katydid with a broad distribution in the Andes from Western Ecuador to the middle Central Cordillera in Colombia. 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. Using micro-scanning laser Doppler vibrometry we 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. The eyespot function is discussed.

}, keywords = {bush-cricket, katydid, mimetism, resonance, stridulation}, issn = {00445231}, doi = {10.1016/j.jcz.2017.10.001}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0044523117300748}, author = {Baker, Andrew and Sarria-S, Fabio A. and Glenn K. Morris and Jonsson, Thorin and Montealegre-Z, Fernando} } @article {47329, title = {Wing mechanics, vibrational and acoustic communication in a new bush-cricket species of the genus Copiphora (Orthoptera: Tettigoniidae) from Colombia}, journal = {Zoologischer Anzeiger - A Journal of Comparative Zoology}, volume = {263}, year = {2016}, month = {Jan-07-2016}, pages = {55 - 65}, abstract = {

Male bush-crickets produce acoustic signals by wing stridulation to call females. Several species also alternate vibratory signals with acoustic calls for intraspecific communication, a way to reduce risk of detection by eavesdropping predators. Both modes of communication have been documented mostly in neotropical species, for example in the genus Copiphora. In this article, we studied vibratory and acoustic signals and the biophysics of wing resonance in Copiphora vigorosa, a new species from the rainforest of Colombia. Different from other Copiphora species in which the acoustic signals have been properly documented as pure tones, C. vigorosa males produce a complex modulated broadband call peaking at ca. 30 kHz. Since males of this species do rarely sing, we also report that substratum vibrations have been adopted in this species as a persistent communication channel. Wing resonances and substratum vibrations were measured using a \μ-scanning Laser Doppler Vibrometry. We found that the stridulatory areas of both wings exhibit a relatively broad-frequency response and the combined vibration outputs fits with the calling song spectrum breadth. The broadband calling song spectrum results from several wing resonances activated simultaneously during stridulation. Under laboratory conditions the calling song duty cycle is very low and males spend more time tremulating than singing.

}, keywords = {bioacoustics, biotremology, bush-cricket, laser Doppler vibrometer, resonance, tremulation, ultrasound}, issn = {00445231}, doi = {10.1016/j.jcz.2016.04.008}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0044523116300584}, author = {Sarria-S, Fabio A. and Buxton, Kallum and Jonsson, Thorin and Fernando Montealegre-Zapata} } @article {16410, title = {The unexpected finding of Parapholidoptera castaneoviridis in south-eastern Romania (Insecta, Orthoptera, Tettigoniidae)}, journal = {ZooKeys}, volume = {643}, year = {2017}, month = {Jun-01-2017}, pages = {87 - 96}, abstract = {

The Balkano-Anatolian genus Parapholidoptera comprises 21 species and the westernmost one, Parapholidoptera castaneoviridis, previously recognized to occur in western Turkey, north-eastern Greece and south-eastern Bulgaria is recorded for the first time from south-eastern Romania, almost 300 km away from the closest known locality. Illustrations and measurements of morphological characters are given and the male calling song from this new, northernmost population is described.

}, keywords = {Balkan Peninsula, bush-cricket, calling song, distribution, relict population}, issn = {1313-2989}, doi = {10.3897/zookeys.643.10645}, url = {http://zookeys.pensoft.net/articles.php?id=10645}, author = {Ionut Stefan Iorgu and Dragan Petrov Chobanov and Elena Iulia Iorgu} } @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} }