title: Social evolution: war of the worms.
abstract: The discovery of a non-reproductive soldier caste in a clonally reproducing trematode greatly extends the taxonomic distribution of eusociality and reaffirms the importance of relatedness in the evolution of reproductive altruism.
authors.affiliation: Department of Ecology and Evolution, Biophore, University of Lausanne, 1015 Lausanne, Switzerland. philip.newey@unil.ch
authors.forename: Philip
authors.initials: P
authors.lastname: Newey
authors.forename: Laurent
authors.initials: L
authors.lastname: Keller
mesh_terms: D000818:Animals; D001522:Behavior, Animal; D005075:Biological Evolution; D006608:Hierarchy, Social; D012098:Reproduction; D014200:Trematoda / Q000254:growth & development / Q000502:physiology*