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Satyrinae butterflies from Sardinia and Corsica show a kaleidoscopic intraspecific biogeography (Lepidoptera, Nymphalidae)

Auteur : Dapporto (Leonardo)

Année de publication : 2010
Publication : Biological Journal of the Linnean Society
Volume : 100
Fascicule : 1
Pagination : 195-212

Résumé :

pplyBrkRulesThe Mediterranean islands of Sardinia and Corsica are known for their/ multitude of endemics. Butterflies in particular have received much/ attention. However, no comprehensive studies aiming to compare/ populations of butterflies from Sardinia and Corsica with those from/ the neighbouring mainland and Sicily have been carried out. In the/ present study, the eleven Satyrinae species inhabiting Sardinia and/ Corsica islands were examined and compared with continental and/ Sicilian populations by means of geometric morphometrics of male/ genitalia. Relative warp computation, discriminant analyses,/ hierarchical clustering, and cross-validation tests were used to/ identify coherent distributional patterns including both islands and/ mainland populations. The eleven species showed multifaceted/ distributional patterns, although three main conclusions can be drawn:/ (1) populations from North Africa and Spain are generally different/ from those belonging to the Italian Peninsula; (2) populations from/ Sardinia and Sicily often resemble the North Africa/Spain ones;/ Corsica shows transitional populations similar to those from France;/ and (3) sea barriers represent filters to dispersal, although their/ efficacy appears to be unrelated to their extension. Indeed, the short/ sea straits between Sardinia and Corsica and between Sicily and the/ Italian Peninsula revealed a strong effectiveness with respect to/ preventing faunal exchanges; populations giving onto sea channels/ between Corsica and Northern Italy and between Sicily and Tunisia/ showed a higher similarity. A comparison of island and mainland/ distributions of the eleven taxa have helped to unravel the complex/ co-occurrence of historical factors, refugial dynamics, and recent/ (post-glacial) dispersal with respect to shaping the populations of/ Mediterranean island butterflies. (C) 2010 The Linnean Society of/ London, Biological Journal of the Linnean Society, 2010, 100, 195-212. SN··-·0024-4066 UT ZOOREC:ZOOR146070