Tempo and mode of species diversification in Dolichopoda cave crickets (Orthoptera, Rhaphidophoridae)

Allegrucci, Giuliana; Trucchi, Emiliano; Sbordoni, Valerio

doi:10.1016/j.ympev.2011.04.002

Cited by 58 publications

(99 citation statements)

References 70 publications

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“…We based our study on a genetic dataset that was used as a basis for mapping acoustic and morphological characters in an attempt to track the evolutionary paths of the acoustic communication in this genus. For these purposes, sequences of the mitochondrial cytochrome c oxidase subunit I (COI) gene and the nuclear internal transcribed spacers 1 and 2 (ITS1 and ITS2) were used that have previously been widely employed in phylogenetic studies of grasshoppers (e.g., Cooper et al 1995;Chapco and Litzenberger 2002) and bush-crickets (Ullrich et al 2010;Allegrucci et al 2011;Boztepe et al 2013;Çiplak et al 2015). The DNA sequences selected for the present study have different modes of evolution and inheritance history, and thus, they may reveal different aspects of the speciation history of the examined lineages.…”

Section: Introductionmentioning

confidence: 99%

Evolution and systematics of Green Bush-crickets (Orthoptera: Tettigoniidae: Tettigonia) in the Western Palaearctic: testing concordance between molecular, acoustic, and morphological data

Grzywacz

Heller²,

Warchałowska‐Śliwa

et al. 2016

Org Divers Evol

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The genus Tettigonia includes 26 species distributed in the Palaearctic region. Though the Green Bush-crickets are widespread in Europe and common in a variety of habitats throughout the Palaearctic ecozone, the genus is still in need of scientific attention due to the presence of a multitude of poorly explored taxa. In the present study, we sought to clarify the evolutionary relationships of Green Bush-crickets and the composition of taxa occurring in the Western Palaearctic. Based on populations from 24 disjunct localities, the phylogeny of the group was estimated using sequences of the cytochrome oxidase subunit I (COI) and the internal transcribed spacers 1 and 2 (ITS1 and ITS2). Morphological and acoustic variation documented for the examined populations and taxa was interpreted in the context of phylogenetic relationships inferred from our genetic analyses. The trees generated in the present study supported the existence of three main lineages: BA^-composed of all sampled populations of Tettigonia viridissima and the Tettigonia vaucheriana complex, BB^-comprising Tettigonia caudata, Tettigonia uvarovi, and the Tettigonia armeniaca complex, and BC^-consisting of Tettigonia cantans. The present study provides the first phylogenetic foundation for reviewing the systematics of Tettigonia (currently classified mostly according to morphological characteristics), proposing seven new synonymies.

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Section: Introductionmentioning

confidence: 99%

Evolution and systematics of Green Bush-crickets (Orthoptera: Tettigoniidae: Tettigonia) in the Western Palaearctic: testing concordance between molecular, acoustic, and morphological data

Grzywacz

Heller²,

Warchałowska‐Śliwa

et al. 2016

Org Divers Evol

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“…Both analyses were carried on the present samples and all Dolichopoda species previously analyzed (Table 2 and Allegrucci et al 2005, 2011; Martinsen et al 2009), considering only COI data set and only the common base pairs consisting of 964 bp.The ‘‘classical’’ DNA barcoding gap analysis was based on the pairwise genetic distances (p-distance). Distribution of genetic distance values was analyzed at different taxonomic levels.…”

Section: Methodsmentioning

confidence: 99%

“…Based on molecular phylogenetic reconstruction (Allegrucci et al 2005; 2009; 2011) the current distribution of Dolichopoda species has been essentially shaped by the palaeogeographic and climatic events occurred in the Mediterranean region, starting from Late Miocene. However, also adaptation to cave life seems to have played an important role in this process.…”

Section: Introductionmentioning

confidence: 99%

“…To better understand the differentiation between these two species and the limits of the ranges occupied by each of them, we carried out a study on several populations of Dolichopoda ligustica and Dolichopoda azami , both at morphological and molecular levels. The main aims of this study are: i) to infer the phylogenetic relationships of these two species, using molecular markers; ii) to compare their differentiation with the differentiation of all other species belonging to genus Dolichopoda previously analyzed (Allegrucci et al 2005, 2009, 2011); iii) to revise the taxonomic arrangement of species and subspecies based on both morphological and molecular characters.…”

Section: Introductionmentioning

confidence: 99%

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Phylogeography and systematics of the westernmost Italian Dolichopoda species (Orthoptera, Rhaphidophoridae)

Allegrucci¹,

Rampini²,

Russo³

et al. 2014

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The genus Dolichopoda (Orthoptera; Rhaphidopohoridae) is present in Italy with 9 species distributed from northwestern Italy (Piedmont and Liguria) to the southernmost Apennines (Calabria), occurring also in the Tyrrhenian coastal areas and in Sardinia. Three morphologically very close taxa have been described in Piedmont and Liguria, i.e., D. ligustica ligustica, D. ligustica septentrionalis and D. azami azami.To investigate the delimitation of the northwestern species of Dolichopoda, we performed both morphological and molecular analyses. Morphological analysis was carried out by considering diagnostic characters generally used to distinguish different taxa, as the shape of epiphallus in males and the subgenital fig in females. Molecular analysis was performed by sequencing three mitochondrial genes, 12S rRNA, 16S rRNA, partially sequenced and the entire gene of COI.Results from both morphological and molecular analyses highlighted a very homogeneous group of populations, although genetically structured. Three haplogroups geographically distributed could be distinguished and based on these results we suggest a new taxonomic arrangement. All populations, due to the priority of description, should be assigned to D. azami azami Saulcy, 1893 and to preserve the names ligustica and septentrionalis, corresponding to different genetic haplogroups, we assign them to D. azami ligustica stat. n. Baccetti & Capra, 1959 and to D. azami septentrionalis stat. n. Baccetti & Capra, 1959.

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“…For Dolichopoda in particular, the invasion of their subterranean habitat by the forest populations is supposedly a relatively recent Color version available online event, promoted by the climatic changes of glacial and interglacial periods during plio-pleistocene [Allegrucci et al, 2011]. The genus Troglophilus is supported as being closely related to Dolichopoda [Allegrucci et al, 2005;Martinsen et al, 2009;Karaman et al, 2011], and it is a rather basal lineage in Rhaphidophoridae [Song et al, 2015] that apparently retained more ancestral habitat preferences [Karaman et al, 2011].…”

Section: Discussionmentioning

confidence: 99%

Neuronal Regression of Internal Leg Vibroreceptor Organs in a Cave-Dwelling Insect (Orthoptera: Rhaphidophoridae: <b><i>Dolichopoda araneiformis</i></b>)

Strauß

Stritih²

2017

Brain Behav Evol

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Animals' adaptations to cave habitats generally include elaboration of extraoptic senses, and in insects the receptor structures located on the legs are supposed to become more prominent in response to constant darkness. The receptors for detecting substrate vibrations are often highly sensitive scolopidial sensilla localized within the legs or the body. For troglobitic insects the evolutionary changes in vibroreceptor organs have not been studied. Since rock is an extremely unfavorable medium for vibration transmission, selection on vibration receptors may be weakened in caves, and these sensory organs may undergo regressive evolution. We investigated the anatomy of the most elaborate internal vibration detection system in orthopteroid insects, the scolopidial subgenual organ complex in the cave cricket Dolichopoda araneiformis (Orthoptera: Ensifera: Rhaphidophoridae). This is a suitable model species which shows high levels of adaptation to cave life in terms of both phenotypic and life cycle characteristics. We compared our data with data on the anatomy and physiology of the subgenual organ complex from the related troglophilic species Troglophilus neglectus. In D. araneiformis, the subgenual organ complex contains three scolopidial organs: the subgenual organ, the intermediate organ, and the accessory organ. The presence of individual organs and their innervation pattern are identical to those found in T. neglectus, while the subgenual organ and the accessory organ of D. araneiformis contain about 50% fewer scolopidial sensilla than in T. neglectus. This suggests neuronal regression of these organs in D. araneiformis, which may reflect a relaxed selection pressure for vibration detection in caves. At the same time, a high level of overall neuroanatomical conservation of the intermediate organ in this species suggests persistence of the selection pressure maintaining this particular organ. While regressive evolution of chordotonal organs has been documented for insect auditory organs, this study shows for the first time that internal vibroreceptors can also be affected.

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Tempo and mode of species diversification in Dolichopoda cave crickets (Orthoptera, Rhaphidophoridae)

Cited by 58 publications

References 70 publications

Evolution and systematics of Green Bush-crickets (Orthoptera: Tettigoniidae: Tettigonia) in the Western Palaearctic: testing concordance between molecular, acoustic, and morphological data

Evolution and systematics of Green Bush-crickets (Orthoptera: Tettigoniidae: Tettigonia) in the Western Palaearctic: testing concordance between molecular, acoustic, and morphological data

Phylogeography and systematics of the westernmost Italian Dolichopoda species (Orthoptera, Rhaphidophoridae)

Neuronal Regression of Internal Leg Vibroreceptor Organs in a Cave-Dwelling Insect (Orthoptera: Rhaphidophoridae: <b><i>Dolichopoda araneiformis</i></b>)

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