Zootaxa, Mitochondrial DNA relationships among North Palaearctic Eptesicus ...

  • Artyushin I
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Abstract

Interspecific hybridization was proposed as one of the explanations for the lack of differentiation between mtDNA of the morphologically divergent bats Eptesicus serotinus and E. nilssonii. However, only West European populations of these species were examined so far. The cytochrome b mitochondrial gene sequences of E. serotinus originating from Russia were compared with those of other North Palaearctic Eptesicus. Common serotines from the Caucasus, Central and South Russia constitute a separate monophyletic group, distinct from western E. serotinus populations, E. nilssonii, and also from E. isabellinus. Only a common serotine from Kaliningrad region proved to be a member of the West European clade. According to these results one may suppose that most of Russian population of E. serotinus escaped the hybridization event that led to fixation of alien mitochondrial genome in the West European populations. Given that (i) preliminary nuclear data support the distinction between E. serotinus and E. nilssonii and (ii) E. serotinus appears morphologically homogeneous throughout the European part of its range, we consider that this past mtDNA introgression has no direct taxonomic implications. For the first time included in a molecular phylogenetic analysis, E. gobiensis was shown to be a full species, related to E. nilssonii. From our mtDNA phylogenetic tree, the taxonomic validity of the subgenus Amblyotus appears doubtful

Author-supplied keywords

  • cytochrome b
  • eptesicus serotinus
  • molecular taxonomy
  • mtdna introgression

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Authors

  • I V Artyushin

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