Phylogenetic systematics of <i>Pseudolebinthus</i>, a new genus of Eneopterinae crickets (Orthoptera, Grylloidea, Eneopteridae) from south‐east Africa

Robillard, Tony

doi:10.1111/j.1365-3113.2006.00347.x

Cited by 17 publications

(24 citation statements)

References 22 publications

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“…Consequently, high dominant frequencies could be emitted by 78 of the 171 Eneopterinae species presently known, i.e., more than 45% (Robillard 2004(Robillard , 2006DesutterGrandcolas and Robillard 2006;Otte 2007), including the 2 putative new species from Vanuatu. Although uncommon in crickets compared with katydids, high-frequency calling may not be a minor phenomenon in crickets.…”

Section: Discussionmentioning

confidence: 98%

“…All of these clades, except the mute genera Paranisitra Chopard, 1925 andSwezwilderia Chopard, 1929 and the recently described genus Pseudolebinthus Robillard, 2006, for which a song is yet unknown (Robillard 2006), are represented here by 1-14 species. Given that song frequency directly depends on stridulum characteristics (Michelsen and Nocke 1974), our taxonomic and acoustic samplings are representative of the acoustic diversity of the whole subfamily, at least in view of the frequency spectra.…”

Section: Acousticsmentioning

confidence: 98%

“…2) were obtained independently. It includes 6 outgroup taxa from 4 other cricket subfamilies (Gryllinae, Itarinae, Tafaliscinae, Landrevinae) and 39 among the 171 species of Eneopterinae (Robillard 2004(Robillard , 2006Robillard and Desutter-Grandcolas 2004a;Desutter-Grandcolas and Robillard 2006;Otte 2007). This phylogeny is based on the analysis of 193 morphological characters and 433 character states, describing the overall morphology (64), male metanotal glands (13), male and female forewing venation (43), and genitalic structures (73).…”

Section: Phylogenymentioning

confidence: 99%

“…However, higher dominant frequencies have been documented in the songs of several crickets from the subfamily Eneopterinae (Desutter-Grandcolas 1997aRobillard 2004), and phylogenetic studies based on morphological and molecular data sets supported a hypothesis of adaptive radiation for high-frequency calling in the Lebinthini tribe (Robillard and Desutter-Grandcolas 2004a, 2004bRobillard 2006).…”

Section: Introductionmentioning

confidence: 95%

“…Our purpose here was (i) to make an exhaustive study of the frequency spectra of Eneopterinae calling songs to describe their spectral patterns and (ii) to contrast these spectral properties in a historical and comparative context, using the phylogenetic reference already available (Robillard and Desutter-Grandcolas 2004a, 2004bRobillard 2006). We discuss the origin and evolutionary patterns of high-frequency calling in the light of the spectral analysis, and propose a functional hypothesis to explain the modes of high-frequency production in crickets.…”

Section: Introductionmentioning

confidence: 99%

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A shift toward harmonics for high-frequency calling shown with phylogenetic study of frequency spectra in Eneopterinae crickets (Orthoptera, Grylloidea, Eneopteridae)

2007

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Dominant frequency is an important feature of cricket song, as it can be used for species recognition and mate choice. The dominant frequency usually ranges from 2 to 8 kHz and corresponds to the fundamental frequency of the song. In preliminary studies we documented high-frequency songs in the subfamily Eneopterinae. To analyse this phenomenon further, we investigate the spectral properties of these cricket songs. Based on the analysis of the frequency spectra in reference to phylogeny, we show that a shift of dominant frequency from the fundamental toward the second or the third harmonic of the song occurred in the Lebinthini tribe. In this clade the upper harmonics (second or third) become the most powerful frequencies of the song. From an evolutionary point of view, we document a case of convergence toward high-frequency calling between species of Eneoptera Burmeister, 1838, which emit alternatively low and high fundamental frequencies, and the Lebinthini, which emit high frequencies using upper harmonics. Functional hypotheses are discussed to explain how these high frequencies could be produced.Résumé : La fréquence dominante du chant d'appel est une propriété importante chez les grillons, car elle peut intervenir dans la reconnaissance spécifique et le choix des mâles par les femelles. Elle est généralement comprise entre 2 et 8 kHz et correspond à la fréquence fondamentale du chant. Nous avons montré dans des travaux préliminaires que des grillons Eneopterinae émettaient leur chant d'appel dans des fréquences beaucoup plus hautes. Pour préciser ces observations, nous avons analysé le spectre de fréquence du chant d'appel de ces espèces. Sur la base de l'étude des spectres en référence à la phylogénie, nous montrons qu'il s'est produit un glissement de la fréquence dominante chez la tribu Lebinthini. Dans ce clade, les fréquences harmoniques (seconde ou troisième) deviennent plus puissantes que la fréquence fondamentale. D'un point de vue évolutif, nous documentons un cas de convergence vers les hautes fréquences chez des espèces d'Eneoptera Burmeister, 1838, qui émettent alternativement des basses et des hautes fréquences fondamentales, et chez les Lebinthini, qui émettent des hautes fréquences en utilisant les harmoniques. Nous présentons des hypothèses fonctionnelles susceptibles d'expliquer comment ces hautes fréquences sont émises.

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Section: Discussionmentioning

confidence: 98%

Section: Acousticsmentioning

confidence: 98%