The study of reproductive isolation and species barriers frequently focuses on mitochondrial
genomes and has produced two alternative and almost diametrically opposed narratives. On …

The Carpathians are the largest mountain range in Central Europe. Their geographical
position, extent, isolation, landscape heterogeneity, well-preserved environment, and …

Palearctic water frogs (genus Pelophylax) are an outstanding model in ecology and
evolution, being widespread, speciose, either threatened or threatening to other species …

The advent of genomic methods allows us to revisit the evolutionary history of organismal
groups for which robust phylogenies are still lacking, particularly in species complexes that …

Hybridization is increasingly recognized as a significant evolutionary process, in particular
because it can lead to introgression of genes from one species to another. A striking pattern …

The radiation of Palearctic green toads (Bufotes) holds great potential to evaluate the role of
hybridization in phylogeography at multiple stages along the speciation continuum. With …

Introduction The major climatic oscillations during the Quaternary Ice Age heavily influenced
the distribution of species and left their mark on intraspecific genetic diversity. Past range …

Hybrid zones are established where two divergent populations meet and interbreed, but
experience some reproductive isolation. If one population expands its range at the expense …

The idea that species boundaries can be semipermeable to gene flow is now widely
accepted but the evolutionary importance of introgressive hybridization remains unclear …

Grass snakes (N atrix natrix) represent one of the most widely distributed snake species of
the P alaearctic region, ranging from the N orth A frican M aghreb region and the I berian P …