Genomic Evidence for Cryptic Speciation in Tree Frogs From the Apennine Peninsula, With Description of Hyla perrini sp. nov

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Ressource 1Télécharger: fevo-06-00144.pdf (4676.22 [Ko])
Etat: Serval
Version: Final published version
ID Serval
serval:BIB_31328CF1BC1D
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Genomic Evidence for Cryptic Speciation in Tree Frogs From the Apennine Peninsula, With Description of Hyla perrini sp. nov
Périodique
Frontiers in Ecology and Evolution
Auteur(s)
Dufresnes C., Mazepa G., Rodrigues N., Brelsford A., Litvinchuk S.N., Sermier R., Lavanchy G., Betto-Colliard C., Blaser O., Borzée A., Cavoto E., Fabre Gg, Ghali Kk, Grossen C., Horn A., Leuenberger J., Phillips B.C., Saunders P.A., Savary R., Maddalena T., Stöck M., Dubey S., Canestrelli D., Jeffries D.L.
ISSN
2296-701X
Statut éditorial
Publié
Date de publication
2018
Peer-reviewed
Oui
Volume
6
Pages
144
Langue
anglais
Résumé
Despite increasing appreciation of the speciation continuum, delimiting and describing new species is a major yet necessary challenge of modern phylogeography to help optimize conservation efforts. In amphibians, the lack of phenotypic differences between closely-related taxa, their complex, sometimes unresolved phylogenetic relationships, and their potential to hybridize all act to blur taxonomic boundaries. Here we implement a multi-disciplinary approach to evaluate the nature of two deeply-diverged mitochondrial lineages previously documented in Italian tree frogs (Hyla intermedia s. l.), distributed north and south of the Northern Apennine Mountains. Based on evidence from mitochondrial phylogenetics, nuclear phylogenomics, hybrid zone population genomics, niche modeling analyses, and biometric assessments, we propose that these lineages be considered distinct, cryptic species. Both mitochondrial and nuclear data affirm that they belong to two monophyletic clades of Pliocene divergence (~3.5 My), only admixing over a relatively narrow contact zone restricted to the southeast of the Po Plain (50–100 km). These characteristics are comparable to similarly-studied parapatric amphibians bearing a specific status. Inferred from their current geographic distribution, the two Italian tree frogs feature distinct ecological niches (<15% of niche overlap), raising questions regarding potential adaptive components contributing to their incipient speciation. However, we found no diagnostic morphological and bioacoustic differences between them. This system illustrates the speciation continuum of Western-Palearctic tree frogs and identifies additional cryptic lineages of similar divergence to be treated as separate species (H. cf. meridionalis). We recommend combined approaches using genomic data as applied here for the future taxonomic assessment of cryptic diversity in alloparapatric radiations of terrestrial vertebrates, especially in controversial taxa. Finally, we formally described the northern Italian tree frogs as a new species, Hyla perrini sp. nov.
Mots-clé
amphibians, bioacoustics, hybrid zone, phylogenomics, RAD-seq, taxonomy
Web of science
Open Access
Oui
Création de la notice
02/10/2018 14:08
Dernière modification de la notice
08/05/2019 16:40
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