La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	What are we dealing with? An explicit test reveals different levels of taxonomical diagnosability in the Sylvia cantillans species complex
Auteurs :	Mattia Brambilla, Auteur ; Severino Vitulano, Auteur ; Andrea Ferri, Auteur ; Fernando Spina, Auteur ; Elena Fabbri, Auteur ; Ettore Randi, Auteur
Type de document :	Article
Dans :	Journal of Ornithology (151(2) APR 2010)
Article en page(s) :	309-315
Langues:	Anglais
Résumé :	Diagnosability is the ability to discriminate between similar taxa, including sibling or cryptic taxa. We have developed an explicit test of diagnosability, using the Sylvia cantillans species complex as a model, which compares an identification based on phenotype with that based on genotype. Individual warblers sampled during their migration in central Italy were first identified to the (sub)species level using putatively diagnostic plumage traits. Nucleotide sequences of a (598-bp) fragment of the mitochondrial (mt)DNA cytochrome b were then used to assign each individual to distinct phylogenetic clades, as determined by reference haplotypes that had been sequenced in breeding individuals. This resulted in the construction of clearly distinct clades corresponding to known taxa of the complex. The new haplotypes were assigned to one of the previously identified groups (corresponding to three different taxa); no sample was assigned outside of them. In contrast, when plumage traits were used to assign the birds into distinct phylogenetic clades,

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