@article {58315, title = {Socotracris kleukersi n. gen. n. sp., a new troglobitic cricket from Socotra (Yemen) (Orthoptera: Grylloidea, Phalangopsidae)}, year = {2012}, abstract = {

The cricket Socotracris kleukersi n. gen., n. sp., collected in a cave at Wadi Zerik, Diksam Plateau, Socotra, Yemen is described. The genus and species are characterized by male and female genitalia and external morphology.

}, keywords = {Cave life, Indian Ocean, new species}, doi = {10.11646/zootaxa.3252.110.11646/zootaxa.3252.1.3}, url = {https://biotaxa.org/Zootaxa/issue/view/zootaxa.3252.1https://biotaxa.org/Zootaxa/article/view/zootaxa.3252.1.3https://biotaxa.org/Zootaxa/article/viewFile/48838/42297}, author = {Desutter-Grandcolas, Laure and Felix, Rob P. W. H.} } @article {58255, title = {A shift toward harmonics for high-frequency calling shown with phylogenetic study of frequency spectra in Eneopterinae crickets (Orthoptera, Grylloidea, Eneopteridae)}, year = {2007}, abstract = {

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 phenom- enon 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.

}, doi = {10.1139/Z07-106}, url = {http://www.nrcresearchpress.com/doi/10.1139/Z07-106}, author = {ROBILLARD, TONY and Grandcolas, Philippe and Desutter-Grandcolas, Laure} } @article {58041, title = {Old Lineage on an Old Island: Pixibinthus, a New Cricket Genus Endemic to New Caledonia Shed Light on Gryllid Diversification in a Hotspot of Biodiversity}, year = {2016}, abstract = {

Few studies have focused on the early colonization of New Caledonia by insects, after the re-emergence of the main island, 37 Myr ago. Here we investigate the mode and tempo of evolution of a new endemic cricket genus, Pixibinthus, recently discovered in southern New Caledonia. First we formally describe this new monotypic genus found exclusively in the open shrubby vegetation on metalliferous soils, named \‘maquis minier\’, unique to New Caledonia. We then reconstruct a dated molecular phylogeny based on five mitochondrial and four nuclear loci in order to establish relationships of Pixibinthus within Eneopterinae crickets. Pixibinthus is recovered as thesister clade of the endemic genus Agnotecous, mostly rainforest-dwellers. Dating results show that the island colonization by their common ancestor occurred around 34.7 Myr, shortly after New Caledonia re-emergence. Pixibinthus and Agnotecous are then one of the oldest insect lineages documented so far for New Caledonia. This discovery highlights for the first time two clear-cut ecological specializations between sister clades, as Agnotecous is mainly found in rainforests with 19 species, whereas Pixibinthus is found in open habitats with a single documented species. The preference of Pixibinthus for open habitats and of Agnotecous for forest habitats nicely fits an acoustic specialization, either explained by differences in body size or in acoustic properties of their respective habitats. We hypothesize that landscape dynamics, linked to major past climatic events and recent change in fire regimes are possible causes for both present-day low diversity and rarity in genus Pixibinthus. The unique evolutionary history of this old New Caledonian lineage stresses the importance to increase our knowledge on the faunal biodiversity of \‘maquis minier\’, in order to better understand the origin and past dynamics of New Caledonian biota.

}, doi = {10.1371/journal.pone.0150920}, url = {https://dx.plos.org/10.1371/journal.pone.0150920}, author = {Anso, J{\'e}r{\'e}my and Barrab{\'e}, Laure and Desutter-Grandcolas, Laure and Jourdan, Herv{\'e} and Grandcolas, Philippe and Dong, Jiajia and ROBILLARD, TONY}, editor = {Fontaneto, Diego} } @article {53575, title = {The cricket fauna of Chiapanecan caves (Mexico): systematics, phylogeny and the evolution of troglobitic life (Orthoptera, Grylloidea, Phalangopsidae, Luzarinae)}, journal = {International Journal of Speleology}, volume = {22}, year = {1993}, month = {Jan-01-1993}, pages = {1 - 82}, abstract = {

The present study deals with the cavernicolous Grylloidea of Chiapas. It details the composition of this fauna, which belongs exclusively to the Phalangopsid group Amphiacustae, and considers its troglobitic evolution in the methodological framework of Comparative Biology. This method consists in analysing the evolution of biological features in reference to phylogeny, using character state optimization. The material studied comes mostly from Italian biospeological expeditions, but also from the authors work in Mexico, from North American biospeological expeditions achieved in Central America and the West Indies, and from the collections of the Academy of Natural Sciences of Philadelphia, the Museum National d\’Histoire naturelle de Paris and the University of Michigan Museum of Zoology. I first present a systematic and phylogenetic analysis of Amphiacustae. Six new genera are defined and the genus Amphiacusta Saussure, 1874 is clearly delimited; twenty-three of the twenty-six species considered in the paper are new and described. A key for genera and species groups is given. Phylogenetic relationships among genera are established using cladistics (implicit enumeration of Hennig 86 program). The evolution of troglobitic Amphiacustae is then analyzed. Available data on the biology of Amphiacust genera are presented and compared with what is known on other Phalangopsidae. Three biological attributes are moreover defined (troglobitic versus non troglobitic; cavernicolous versus non cavernicolous; leaf litter foraging versus leaf litter not foraging). The mapping of the attributes upon our cladogram has shown that Amphiacustae evolved twice toward cave life and that their ancestral habitat could be characterized by cavernicolous habits and leaf litter foraging. The results are discussed in reference to theories on troglobitic taxa evolution, and to the exaptation concept of Gould \& Vrba (1982). This leads to three main conclusions: 1) Amphiacust adaptation to caves could be the result of a tentative to exploit karstic resources in Central America; 2) An epigean dispersion by cave living species can be hypothesized; 3) For Grylloidea, having cavernicolous habits at ground level appears to be exaptative to troglobitic life.

}, issn = {0392-6672}, doi = {10.5038/1827-806X10.5038/1827-806X.22.110.5038/1827-806X.22.1.1}, url = {http://scholarcommons.usf.edu/ijs/}, author = {Desutter-Grandcolas, Laure} } @article {52791, title = {Phylogeny and the evolution of acoustic communication in extant Ensifera (Insecta, Orthoptera)}, journal = {Zoologica Scripta}, volume = {32}, year = {2003}, month = {Jan-11-2003}, pages = {525 - 561}, abstract = {

Ensifera present an appropriate and interesting model for the study of acoustic communication, because of their diverse signal and communication modalities, and due to their accessibility for field and laboratory studies. Several hypotheses have been proposed to explain the acoustic evolution of Ensifera, but they were elaborated without any reference to a falsifiable phylogeny, and were consequently highly speculative. Similarly, phylogenetic relationships between ensiferan clades have not hitherto been studied using modern standard methodology, and the sole cladistic analysis by Gwynne in 1995 was methodologically flawed. No sound hypothesis therefore currently exists for ensiferan phylogeny, which precludes historical analysis of their communication modalities. In the present paper, the phylogeny is established on the basis of morpho-anatomical characters and used to analyse the evolution of acoustic communication in this clade by mapping the characters related to auditory and stridulatory structures onto the resultant trees. Cladistic analyses resulted in two equi-parsimonious cladograms (length 154, C 64, CI 58, RI 61) with the following topologies: (1) [(Grylloidea\–Gryllotalpidae) (Rhaphidophoridae (Schizodactylidae (Gryllacrididae ((Stenopelmatidae\–Cooloola) (Anostostomatidae (Prophalangopsis (Cyphoderris (Tettigoniidae\–Lezina))))))))] (2) [(Grylloidea\–Gryllotalpidae)(Rhaphidophoridae (Schizodactylidae (Gryllacrididae\–Cooloola\–(Stenopelmatidae (Anostostomatidae (Prophalangopsis (Cyphoderris (Tettigoniidae\–Lezina))))))))]. According to these topologies, Ensifera were ancestrally devoid of acoustic and hearing systems. An acoustic (tegminal or femoro-abdominal) apparatus appeared a number of times independently with convergent structures. Similarly, tibial tympana developed several times independently. Moreover, four hypotheses (each according to a definite pattern of character transformation) can be proposed to explain the evolution of acoustic communication in the different ensiferan clades and relate it to a definite communicatory context. These hypotheses do not apply equally to ensiferan subclades. Grylloidea and Gryllotalpoidea could have experienced convergently a direct development of an intraspecific acoustic communication. Acoustic communication in Tettigoniidea has evolved more ambiguously, and may either have resulted from a direct evolution analogous to that having occurred in Gryllidea, or have developed in a completely different behavioural context. Future studies of acoustic communication in the different ensiferan clades will have to take into account the fact that the involved structures most often are not homologous and that their evolution may not have taken place in similar conditions. Different hypotheses of acoustic communication evolution may apply to different clades, and there may be no single explanation for acoustic communication in Ensifera.

}, issn = {0300-3256}, doi = {10.1046/j.1463-6409.2003.00142.x}, url = {http://doi.wiley.com/10.1046/j.1463-6409.2003.00142.xhttps://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046\%2Fj.1463-6409.2003.00142.x}, author = {Desutter-Grandcolas, Laure} } @article {47742, title = {Phylogeny of the cricket subfamily Eneopterinae (Orthoptera, Grylloidea, Eneopteridae) based on four molecular loci and morphology}, journal = {Molecular Phylogenetics and Evolution}, volume = {40}, year = {2006}, month = {Jan-09-2006}, pages = {643 - 661}, abstract = {

The phylogenetic relationships of 39 species of Eneopterinae crickets are reconstructed using four molecular markers (16S rRNA, 12S rRNA, cytochrome b , 18S rRNA) and a large morphological data set. Phylogenetic analysis via direct optimisation of DNA sequence data using parsimony as optimality criterion is done for six combinations of weighting parameter sets in a sensitivity analysis . The results are discussed in a twofold purpose: W rst, in term of signi W cance of the molecular markers for phylogeny reconstruction in Ensifera, as our study represents the W rst molecular phylogeny performed for this insect suborder at this level of diversity; second, in term of corrobora- tion of a previous phylogeny of Eneopterinae, built on morphological data alone. The four molecular markers all convey phylogen etic signal, although variously distributed on the tree. The monophyly of the subfamily, that of three over W ve tribes, and of 10 over 13 genera, are recovered. Finally, previous hypotheses on the evolution of acoustic devices and signals in the Eneopterinae clade are brie X y tested, and supported, by our new data set.

}, issn = {10557903}, doi = {10.1016/j.ympev.2005.10.019}, url = {http://linkinghub.elsevier.com/retrieve/pii/S1055790306001308}, author = {Tony Robillard and Desutter-Grandcolas, Laure} } @article {47734, title = {A revision of Neotropical Eneopterinae crickets (Orthoptera, Grylloidea, Eneopteridae) with a phylogenetic discussion}, journal = {Insect Systematics \& Evolution}, volume = {35}, year = {2004}, month = {Jan-10-2004}, pages = {411 - 435}, abstract = {

A revision of Eneopterinae crickets from the Neotropical region is achieved in a cladistic perspective using for the first time characters of male and female genitalia and male forewing venation. Each genus is redefined and its monophyly assessed with reference to all known Eneopterinae genera. 6 new species are described (Eneoptera gracilis, E. nigripedis, Ligypterus belmontensis, L. linharensis, L. pernambucensis and Ponca hebardi) and an identification key is proposed for both males and females. Phylogenetic relationships are discussed and distributions characterised.

}, issn = {1399-560X}, doi = {10.1163/187631204788912427}, url = {http://booksandjournals.brillonline.com/content/journals/10.1163/187631204788912427}, author = {Desutter-Grandcolas, Laure and Tony Robillard} }