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MULTIPLE INTRODUCTIONS OF THE FORFICULA AURICULARIA SPECIES COMPLEX (DERMAPTERA: FORFICULIDAE) IN EASTERN NORTH AMERICA

Published online by Cambridge University Press:  31 May 2012

Stéphanie Guillet*
Affiliation:
CNRS UMR 6553 EcoBio, Bat. 14, Campus de Beaulieu, 35042 Rennes Cedex 02, France
Nathalie Josselin
Affiliation:
CNRS UMR 6553 EcoBio, Bat. 14, Campus de Beaulieu, 35042 Rennes Cedex 02, France
Michel Vancassel
Affiliation:
CNRS UMR 6553 EcoBio, Bat. 14, Campus de Beaulieu, 35042 Rennes Cedex 02, France
*
1 Author to whom all corresponding should be addressed. (E-mail: stephanie.guittet@univ-rennes1.fr).

Abstract

A survey of nine populations of the European earwig, Forficula auricularia L., species complex from eastern North America revealed the presence of the two sibling species recently identified as species A and B. A mitochondrial analysis, based on restriction polymorphism observed on the 16S rRNA and the cytochrome oxydase regions, proved to be a rapid method to identify and distinguish these two species. Furthermore, consistency between these mitochondrial data and a biological diagnosis, based on the dates and number of oviposition periods in each population, revealed that species A and B occupy different habitats. These observations are consistent with the hypothesis of multiple introductions of the two species on the Atlantic coast of North America, followed by a selection of the most adapted species to each habitat.

Résumé

L’étude de neuf populations du complexe d’espèces de perce-oreille Européen, Forficula auricularia L., localisées à l’est de l’Amérique du Nord, a révélé la présence de deux espèces jumelles récemment identifiées en tant qu’espèce A et espèce B. Une analyse mitochondriale, basée sur le polymorphisme de restriction observé pour les régions 16S rRNA et cytochrome oxydase, a permis d’identifier et de distinguer rapidement ces deux espèces. De plus, la concordance de ces données mitochondriales avec une diagnose biologique basée sur les dates et le nombre de pontes dans chaque population a révélé que les espèces A et B occupent des habitats différents. Ces observations concordent avec l’hypothèse selon laquelle les deux espèces auraient été introduites à de multiples reprises sur la côte Atlantique de l’Amérique du Nord, l’espèce la mieux adaptée ayant été sélectionnée dans chaque habitat.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 2000

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