By Susan Milius
Battles between the sexes have been much more important in creating species than scientists have realized, say Swedish researchers.
Lineages of insects rife with sex conflict have split into at least four times as many species compared with related lineages with less conflict, report Göran Arnqvist and his colleagues at the University of Umeå in Sweden. In the Sept. 12 Proceedings of the National Academy of Sciences, they describe their first-of-a-kind comparison of 25 pairs of lineages.