Coup de pied dans la fourmilière du vivant : une étude conduite à Montpellier montre qu’une même fourmi peut donner naissance à des individus de deux espèces différentes. C’est la xénoparité, qui s’a…

Une nouvelle étude révèle un phénomène inédit dans le règne animal : certaines reines donnent naissance à des mâles d’une autre espèce. Ce mécanisme appelé « xénoparité » permet à leurs colonies de su...

Insect populations have declined worldwide, but the extent and drivers of these declines are debated. Most studies rely on field surveys performed in the past century, leaving gaps in our understandin...

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Ant queens of one species clone ants of another to create hybrid workers that do their bidding.

Phylogenomic analysis of 2524 ultraconserved-element loci from 58 Messor harvester ant species helps in redefining taxonomic groups of the genus. Messor ants emerged in the Irano-Indian area around ...

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Nature - Parasite-ridden ants don’t venture out of the nest, which might help to prolong their lives.

Author summary Current coalescent-based species-delimitation approaches rely on the diagnosis of genetic structure to identify putative taxa. However, when multiple population lineages from the same species are sampled, the conflation of populations with species leads to a proliferation of artifactual “species”, resulting in inaccurate diversity estimates that are challenging systematic studies and fields that rely upon accurately delimited species boundaries. We present here a new approach to delimitation that explicitly models speciation as an extended process, from the formation of new population lineages to the development of independent species. This allows for computational discrimination between genetic structure that corresponds to species lineages versus population lineages within species, transforming species delimitation in both theory and practice in this age of high-resolution genomic data.

Analysis of the smallest known arthropod genome reveals a mechanism for genome reduction that appears to be driven by a specialized ecological interaction with plants.

Abstract. In phylogenetic inference, we commonly use models of substitution which assume that sequence evolution is stationary, reversible, and homogeneous