The emergence of new species is driven by the establishment of mechanisms that limit gene
flow between populations. A major challenge is reconciling the theoretical and empirical …

Sexual selection can displace traits acting as ornaments or armaments from their viability
optimum in one sex, ultimately giving rise to sexual dimorphism. The degree of dimorphism …

Highlights•Successful but low rates of hybridization.•Females but not males discriminate
against heterospecific mating partners.•Maternal inheritance of female mating behaviour.• …

Sexual selection is generally held responsible for the exceptional diversity in secondary
sexual traits in animals. Mating system evolution is therefore expected to profoundly affect …

The extent of interspecific gene flow and its consequences for the initiation, maintenance,
and breakdown of species barriers in natural systems remain poorly understood …

Reproductive traits are some of the fastest diverging characters and can serve as
reproductive barriers. The free-living flatworm Macrostomum lignano, and its congener M …

Sexual selection has 2 main components, female preference and male–male competition,
which can lead males to adopt alternative reproductive tactics to optimize their reproductive …

Identifying the contribution of pre‐and postzygotic barriers to gene flow is a key goal of
speciation research. The widespread dung fly species Sepsis cynipsea and Sepsis …

Organismal life histories evolve as syndromes, resulting in correlated evolutionary
differentiation of key traits that ultimately aid in discerning species. Reproductive success …

Understanding why and how multiple species manage to coexist represents a primary goal
of ecological and evolutionary research. This is of particular relevance for communities that …