Morphological and Allozyme Variation in the Ephippiger Ephippiger Complex (Orthoptera, Tettigonioidea)

Oudman, L.; Duijm, M; Landman, Willem

doi:10.1163/156854290x00037

Cited by 17 publications

(15 citation statements)

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“…Our samples incorporate all the subspecies known to occur in this region. E. e. moralesagacinoi, described from the Western Pyrenees, was suppressed by Oudman et al (1990), who could not distinguish it from E. e. cunii. Other subspecies (E. e. vicheti and E. e. ephippiger) are from a disjunct eastern distribution.…”

Section: Methodsmentioning

confidence: 99%

“…Cruciger is from the Languedoc region (along the Mediterranean coast) and is much larger and lighter in colour than cunii and vitium. It has a polysyllabic calling song (4-8 syllables per chirp) and Phylogeography of the bushcricket E. ephippiger LJ Spooner and MG Ritchie has a melanised cross on the pronotum (Hartley and Warne, 1984;Oudman et al, 1990). Figure 1 shows the regions and distributions.…”

Section: Methodsmentioning

confidence: 99%

“…The cunii form was given subspecies status Hartley and Warne, 1984). Later studies questioned whether cunii was a valid subspecies: allozymes showed very low genetic divergence between the three forms, and any potential diagnostic traits in these studies were linked by non-coincident, extremely wide clines (Oudman et al, 1989(Oudman et al, , 1990Duijm, 1990).…”

Section: Introductionmentioning

confidence: 99%

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An unusual phylogeography in the bushcricket Ephippiger ephippiger from Southern France

Spooner

Ritchie

2006

Heredity

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Pleistocene glaciations have played a major role in species divergence. The bushcricket Ephippiger ephippiger shows unusual patterns of intraspecific variation in multiple traits across Southern Europe. This is centred in Southern France, and evidence implies that it results from secondary contact after differentiation in Pleistocene refugia. However, the possible time scales involved, locations of the refugia and patterns of expansion remain obscure. This study sequenced the COII (507 BP) and cyt b (428 BP) mitochondrial genes to examine the intraspecific phylogeography of Western European samples of E. ephippiger. A minimum evolution tree revealed little resolution between described subspecies of E. ephippiger. Strikingly, populations from the Pyrenees and Mediterranean coastal region contained a complex genetic structure corresponding to major river valleys, independent of the traditional taxonomy. Samples of the subspecies E. e. vitium formed a distinct clade, perhaps supporting their taxonomic status. However, other forms (cruciger and cunii) were not genetically distinct, which is surprising given differences in their morphology and behaviour. The extent of the genetic divergence between Pyreneen valleys is unexpectedly deep, with average Tamura-Nei distances of around 14% (net distances of 11%) separating the main clades of coding COII sequences. Cyt b showed a similar pattern, but was confounded by some non-coding probable pseudogenes. If a conventional insect molecular clock is applied, these cryptic clades must predate the Pleistocene, and hypotheses for their history are discussed. However, mtDNA divergence in Ephippiger is not evolving in a clock-like manner, because a likelihood ratio test rejects clock assumptions for the COII sequences.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An unusual phylogeography in the bushcricket Ephippiger ephippiger from Southern France

Spooner

Ritchie

2006

Heredity

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“…The lack of concordance between trait variation described by Oudman et al (1990) is reflected here by Querigut's position in the phenograms, which is in disagreement with its behaviour and geographical location. This could perhaps be explained if this population has exchanged substantial gene flow with the lowland form.…”

Section: Discussionmentioning

confidence: 64%

“…Subsequent detailed study of both morphology and allozymes seemed to confirm this with no diagnostic traits for each subspecies and dma! variation linking each proposed distinguishing trait (Duijm, 1990;Oudman et a!., 1989Oudman et a!., , 1990. Hence E. ephippiger could be a case in which the original taxonomy overestimated the number of evolutionary species present in a species complex.…”

Section: Introductionmentioning

confidence: 99%

Variability of the bushcricket Ephippiger ephippiger: RAPDs and song races

et al. 1997

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The tettigoniid bushcricket, Ephippiger, shows extensive variability in morphology and behaviour in Western Europe. Several species and subspecies have been described, but many may only represent local forms of uncertain origin. Within Ephippiger ephippiger, patterns of variation differ between morphology (upon which most taxonomic forms are defined) and behaviour. There is sufficient variation in a sexual signal (calling song) within the species that 'song races' have been described, which show strong premating isolation from each other. Here RAPD markers (138 fragments from 10 primers) have been used to examine the extent and pattern of genetic differentiation within the species and between two congeneric species.Ephippiger ephippiger is clearly distinguished from its relatives. High genetic similarity has been found within E. ephippiger, Nei and Li's S averaging 0.67. Using both distance and parsimony methods resolves the relationships of the song races and morphological forms of E. ephippiger with the exception of one population. The song races represent the deepest division within the species, but the lack of concordance in different traits suggests that a complex pattern of subspecific variation is found within this species.

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A Geographical Information Science (GISc) Approach to Exploring Variation in The Bush Cricket Ephippiger ephippiger

Kidd

Ritchie

2001

GIS and Remote Sensing Applications in Biogeography and Ecology

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Morphological and Allozyme Variation in the Ephippiger Ephippiger Complex (Orthoptera, Tettigonioidea)

Cited by 17 publications

References 0 publications

An unusual phylogeography in the bushcricket Ephippiger ephippiger from Southern France

An unusual phylogeography in the bushcricket Ephippiger ephippiger from Southern France

Variability of the bushcricket Ephippiger ephippiger: RAPDs and song races

A Geographical Information Science (GISc) Approach to Exploring Variation in The Bush Cricket Ephippiger ephippiger

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