Curious Katydids from the Andes of Colombia and Ecuador: Three New Species, a New Genus and Acoustic Baffles

Braun, Holger; Chamorro-Rengifo, Juliana; Morris, Glenn K.

doi:10.1665/034.018.0209

Cited by 7 publications

(4 citation statements)

References 16 publications

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“…The costal cell array of X. amplipennis, hanging down into contact with the insect's pleura, is positioned to serve as an acoustic baffle. This is the understood role of tegminal costal areas in other tettigoniids (Braun, Chamorro-Rengifo & Morris 2009). The two sides of a sound-radiating plate produce sound waves exactly out of phase, making for destructive interference at plate edges.…”

Section: Costal Array As Both Baffle and Radiatormentioning

confidence: 99%

“…These air spaces are critical in katydid sound-making, for they load the speculae with sound radiation impedances (Michelsen 1983). Tegminal generators are also seen as dipole sound sources (Fletcher 1992;Braun, Chamorro-Rengifo & Morris 2009), i.e., a cantilevered oscillating diaphragm radiating sound to both of its sides. In most katydids the anterior or costal margin of the tegmen deflects down upon the singer's sides.…”

Section: Introductionmentioning

confidence: 99%

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Stridulation of the clear-wing meadow katydidXiphelimum amplipennis, adaptive bandwidth

2016

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Rubbed wings, analysed calls and peculiar sound generator structure in males of a conocephaline katydid, Xiphelimum amplipennis, give insight into the making of broadband spectra. High shear forces are indicated by a robust forewing morphology. Intensity is high for frequencies in a 20-60 kHz ultrasonic band. Besides a typical katydid sound-radiating mirror and harp, this insect has a long costal series of semitransparent specular sound radiators. These wing cells are loaded behind by an enlarged and partitioned subwing air space.Calls repeat steadily with five different time-domain sound elements. Distinctive spectra are associated with two of these, giving stepwise frequency modulation that combines to create the exceptionally wide spectral breadth. Broadcast sound levels at 10 cm dorsal, right and left, are near 100 dB. Costal wing-cell sound radiation was explored by loading the costal 'speculae' with wax. This produced almost no decrease in lateral sound levels, but did alter spectral content. Apparently this insect's costal region both baffles and radiates. The species lives at high densities in cluttered vegetation and sound signal attenuation should code via spectral shape for distance ranging.

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Section: Costal Array As Both Baffle and Radiatormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Stridulation of the clear-wing meadow katydidXiphelimum amplipennis, adaptive bandwidth

2016

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“…Male songs of up to 10 specimens for each species were recorded using an Edirol R09 digital recorder and sampled with CoolEdit 2.0 at 41 kHz (16 bits), sometimes using the Noise Reduction function that is known not to affect peak values (Braun et al 2009). …”

Section: Methodsmentioning

confidence: 99%

Bioacoustics of Some Mexican Orthoptera (Insecta: Orthoptera: Ensifera, Caelifera)

Buzzetti

Barrientos-Lozano²

2011

Bioacoustics

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“…Regional studies continued with the revision of the Tettigoniidae of the Departamento del Quindío by Francisco Serna (2005) and the revision of the Pseudophyllinae in Colombian collections by Rodrigo Romero (2009). Then the first record of Hexacentrinae with two new species was published (Braun et al 2009). In the last two years seven more species were described (Montealegre-Z.…”

Section: Introductionmentioning

confidence: 99%

Checklist and new distribution records of katydids (Orthoptera: Tettigoniidae) from Colombia

Montealegre‐Z

2011

Zootaxa

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This article compiles information about the species of Tettigoniidae present in Colombia, based on biological collections and the literature. To date 345 species grouped in 129 genera and seven subfamilies are known from the country. The presence of 77 species recorded from other countries is documented for the first time. Regarding the katydids the data on geographical distribution show that less than 50% of the national territory has been scientifically explored. The best-represented area is the Valle del Cauca, due to regional faunistic inventories and taxonomic studies.

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Curious Katydids from the Andes of Colombia and Ecuador: Three New Species, a New Genus and Acoustic Baffles

Cited by 7 publications

References 16 publications

Stridulation of the clear-wing meadow katydidXiphelimum amplipennis, adaptive bandwidth

Stridulation of the clear-wing meadow katydidXiphelimum amplipennis, adaptive bandwidth

Bioacoustics of Some Mexican Orthoptera (Insecta: Orthoptera: Ensifera, Caelifera)

Checklist and new distribution records of katydids (Orthoptera: Tettigoniidae) from Colombia

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