Speciation in Mediterranean refugia and post‐glacial expansion of Zerynthia polyxena (Lepidoptera, Papilionidae)
Identifieur interne : 000C56 ( Main/Merge ); précédent : 000C55; suivant : 000C57Speciation in Mediterranean refugia and post‐glacial expansion of Zerynthia polyxena (Lepidoptera, Papilionidae)
Auteurs : Leonardo Dapporto [Italie]Source :
- Journal of Zoological Systematics and Evolutionary Research [ 0947-5745 ] ; 2010-08.
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- geographic : Europe.
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Abstract
Migration of populations to and from glacial refugia is responsible for various cases of speciation and subspeciation in Europe. The pattern of distribution and the degree of diversification between lineages originated by isolation in different glacial refugia usually depends on ecological traits, especially to their dispersal ability. Zerynthia polyxena is a philopatric species, scattered in small populations and rarely colonizing mountain areas. These characteristics probably caused repeated isolation during the Quaternary and may have favoured diversification. Actually two studies, based on both morphological and genetic data, suggest the existence of two highly distinct lineages in Europe having in Northern Italy their contact zone. In this study, I applied geometric morphometrics to male genitalia and demonstrated that (i) two morphotypes exist in Europe approximately facing on the two sides of the Po River; (ii) the two lineages probably survived glaciations in Italy and the Balkan Peninsula, respectively; then the Balkans lineage expanded to Central and Eastern Europe; (iii) no hybrid populations seem to exist in the contact area and, in one locality at least, the two lineages live in sympatry without any evidence of intermediates. These results suggest that (i) two sister species of Zerynthia exist in Europe. Accordingly, Papilio cassandra Geyer, 1828 is reinstated, as Zerynthia cassandra stat. rev., as the species to which the Zerynthia from Italy South of the Po River belong. Male genitalia differences with Zerynthia polyxena are described.
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DOI: 10.1111/j.1439-0469.2009.00550.x
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