Article Dans Une Revue Biological Journal of the Linnean Society Année : 2021

Species diversity and biogeography of an ancient frog clade from the Guiana Shield (Anura: Microhylidae: Adelastes , Otophryne , Synapturanus ) exhibiting spectacular phenotypic diversification

Killian Leblanc
  • Fonction : Auteur
Marlene Framit
  • Fonction : Auteur
Miguel Rodrigues
Santiago Castroviejo-Fisher
  • Fonction : Auteur
Ivan Prates
  • Fonction : Auteur
Sabrina Baroni
  • Fonction : Auteur
Leandro Moraes
  • Fonction : Auteur
Renato Recoder
Sergio Marques de Souza
  • Fonction : Auteur
Francisco Dal Vecchio
  • Fonction : Auteur
Agustín Camacho
  • Fonction : Auteur
José Mario Ghellere
  • Fonction : Auteur
Fernando Rojas-Runjaic
  • Fonction : Auteur
Giussepe Gagliardi-Urrutia
  • Fonction : Auteur
Vinícius Tadeu de Carvalho
  • Fonction : Auteur
Marcelo Gordo
  • Fonction : Auteur
Marcelo Menin
  • Fonction : Auteur
Philippe Kok
  • Fonction : Auteur
Tomas Hrbek
  • Fonction : Auteur
Fernanda Werneck
Andrew Crawford
  • Fonction : Auteur
Santiago Ron
Jonh Jairo Mueses-Cisneros
  • Fonction : Auteur
Rommel Roberto Rojas Zamora
  • Fonction : Auteur
Dante Pavan
  • Fonction : Auteur
Pedro Ivo Simões
  • Fonction : Auteur
Raffael Ernst
Anne-Claire Fabre
  • Fonction : Auteur

Résumé

Abstract The outstanding biodiversity of the Guiana Shield has raised many questions about its origins and evolution. Frogs of the genera Adelastes, Otophryne and Synapturanus form an ancient lineage distributed mostly across this region. These genera display strikingly disparate morphologies and life-history traits. Notably, Synapturanus is conspicuously adapted to fossoriality and is the only genus within this group to have dispersed further into Amazonia. Moreover, morphological differences among Synapturanus species suggest different degrees of fossoriality that might be linked to their biogeographical history. Through integrative analysis of genetic, morphometric and acoustic data, we delimited 25 species in this clade, representing a fourfold increase. We found that the entire clade started to diversify ~55 Mya and Synapturanus ~30 Mya. Members of this genus probably dispersed three times out of the Guiana Shield both before and after the Pebas system, a wetland ecosystem occupying most of Western Amazonia during the Miocene. Using a three-dimensional osteological dataset, we characterized a high morphological disparity across the three genera. Within Synapturanus, we further characterized distinct phenotypes that emerged concomitantly with dispersals during the Miocene and possibly represent adaptations to different habitats, such as soils with different physical properties.

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Antoine Fouquet, Killian Leblanc, Marlene Framit, Alexandre Réjaud, Miguel Rodrigues, et al.. Species diversity and biogeography of an ancient frog clade from the Guiana Shield (Anura: Microhylidae: Adelastes , Otophryne , Synapturanus ) exhibiting spectacular phenotypic diversification. Biological Journal of the Linnean Society, 2021, 132 (2), pp.233-256. ⟨10.1093/biolinnean/blaa204⟩. ⟨hal-03410769⟩
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