@article {50916,
	title = {Quality calls: phylogeny and biogeography of a new genus of neotropical katydid (Orthoptera: Tettigoniidae) with ultra pure-tone ultrasonics},
	journal = {Systematics and Biodiversity},
	volume = {9},
	year = {2011},
	month = {Sep-03-2012},
	pages = {77 - 94},
	abstract = {<p>This paper describes Artiotonus, a new genus of tropical katydid from Colombia and Ecuador. These acoustic ensiferans are represented by three species with a geographic distribution generally restricted to the rainforest of the Bolivar geosyncline of northwestern South America (Pacific). A phylogenetic analysis based on 28 morphological and six behavioural characters produced a tree (A. artius, (A. tinae, A. captivus)) with a consistency index of 0.9. All species are defined by a few autapomorphic changes. The most reliable character for identification is the temporal pattern of the calling song, suggesting a recent genetic divergence. Biogeographic analysis indicates that such genetic divergence began with geographic isolation produced before the Holocene transgression. Species of this genus are remarkable in that the calling song of males exhibits a narrow spectrum with a high quality factor (37\&ndash;42), unusual values for such ultrasonic signals. A broad discussion on the evolution of tonal calls and pulse trains is offered.</p>
},
	keywords = {Biogeography, calling song, Conocephalinae, high-Q, pure tone, ultrasound},
	issn = {1477-2000},
	doi = {10.1080/14772000.2011.560209},
	url = {http://www.tandfonline.com/doi/abs/10.1080/14772000.2011.560209},
	author = {Fernando Montealegre-Zapata and Glenn K. Morris and Sarria-S, Fabio A. and Mason, Andrew C.}
}
@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 = {<p>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 \&mu;-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.</p>
},
	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}
}
