Guillaume Lavanchy

Widespread but cryptic introgression shapes genetic diversity in natural populations

The paper quantifies introgression in 4126 ant colonies, finding 23% of species show introgression, more than double previous estimates, and suggests postzygotic barriers constrain it.

Hybridogenesis as an intermediate step between sexual reproduction and parthenogenesis

The paper traces the evolutionary trajectory from hybridogenesis to parthenogenesis and triploid lineages in stick-insects, showing a stepwise transition driven by genomic changes.

Do morphologically distinct groups correspond to reproductively isolated species? A case study in Myrmica ants from Switzerland

The study examines whether morphologically distinct Myrmica ant species are reproductively isolated using genetic data, finding high congruence between morphology and genetic lineage.

Recent neo-X and Y sex chromosomes in an ant cricket

The paper identifies young neo-sex chromosomes in ant crickets and estimates their evolutionary origin and recombination suppression events.

Decontaminating genomic data for accurate species delineation and hybrid detection in the Lasius ant genus

The paper develops a decontamination pipeline to detect and remove contamination in genomic data, revealing rare introgression in Lasius ants.

LEVERAGING CITIZEN SCIENCE TO ASSESS RICHNESS, DIVERSITY, AND ABUNDANCE IN ANT COMMUNITIES

This paper integrates citizen science data with scientific sampling to model ant community richness, diversity, and abundance across elevation gradients.