Origin, extinction and ancient DNA of a new fossil insular viper: molecular clues of overseas immigration - Archive ouverte HAL Access content directly
Journal Articles Zoological Journal of the Linnean Society Year : 2020

Origin, extinction and ancient DNA of a new fossil insular viper: molecular clues of overseas immigration

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Enric Torres-Roig
  • Function : Author
Kieren J Mitchell
Josep Antoni Alcover
  • Function : Author
Fernando Martínez-Freiría
Holly Heiniger
  • Function : Author
Matthew Williams
  • Function : Author
Alan Cooper
  • Function : Author
Joan Pons
  • Function : Author
Pere Bover
  • Function : Author
  • PersonId : 1102172

Abstract

Viperinae is a subfamily of viperid snakes whose fossil record in the Mediterranean islands is, until now, restricted to 12 palaeontological deposits on seven islands. Revision of the material excavated 30 years ago from the Middle/ Late Pleistocene-Holocene deposit of Es Pouàs [Eivissa (= Ibiza), Balearic Islands, western Mediterranean] revealed about 6000 bones of a small-sized viper across different stratigraphic levels. Its morphological characteristics are different enough to known species of Vipera to warrant the description of a new species, but the nearly complete mitochondrial genome obtained from this snake based on a sample dated to 16 130 ± 45 bp, suggested it belonged to a new insular population of Lataste's viper (Vipera latastei), Vipera latastei ebusitana subsp. nov. Phylogenetic analysis indicates that the dispersal of the ancestors of V. l. ebusitana to Eivissa, most probably from a northeast Iberian population, occurred via overwater colonization < 1.5 Mya, well after the Messinian Salinity Crisis (5.97-5.32 Mya) when land bridges allowed terrestrial colonization of the Balearic Islands by mainland faunas. The morphological differences between V. l. ebusitana and the Iberian populations suggest that it is a new dwarf taxon resulting from insular evolutionary processes, becoming extinct shortly after the first human arrival to this island about 4000 years ago. ADDITIONAL KEYWORDS: ancient DNA-extinction-invasive species-island fauna-Mediterraneanmitochondrial DNA-molecular clocks-new taxa-Quaternary-Serpentes.
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mnhn-03261394 , version 1 (20-12-2022)

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Enric Torres-Roig, Kieren J Mitchell, Josep Antoni Alcover, Fernando Martínez-Freiría, Salvador Bailon, et al.. Origin, extinction and ancient DNA of a new fossil insular viper: molecular clues of overseas immigration. Zoological Journal of the Linnean Society, 2020, 192 (1), pp.144-168. ⟨10.1093/zoolinnean/zlaa094⟩. ⟨mnhn-03261394⟩
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