Background The study of recently-diverged species offers significant challenges both in the
definition of evolutionary entities and in the estimation of gene flow among them. Iberian and …

Species divergence is typically thought to occur in the absence of gene flow, but many
empirical studies are discovering that gene flow may be more pervasive during species …

When recently diverged taxa come into contact, the extent of introgression between them is
related to the degree of differentiation that they have achieved. Studying contact zones is …

Evolutionary inference based on molecular phylogenetic methods has profoundly modified
the way that we understand biological diversity, unravelling a higher evolutionary diversity …

Genealogical discordance, or when different genes tell distinct stories although they evolved
under a shared history, often emerges from either coalescent stochasticity or introgression …

Aim To examine the effect of a known geological barrier on genetic variation within a wall
lizard species complex. Location The Iberian Peninsula and North Africa. Methods …

Allopatry and allopatric speciation can arise through two different mechanisms: vicariance or
colonization through dispersal. Distinguishing between these different allopatric …

Mitochondrial markers are still often used alone to identify evolutionary units, despite
widespread evidence for processes such as incomplete lineage sorting or introgressive …

Combining different sources of information is essential for a complete understanding of the
process of genetic differentiation between species. The Iberian and North African wall lizard …

Interspecific gene flow is pervasive throughout the tree of life. Although detecting gene flow
between populations has been facilitated by new analytical approaches, determining the …