Max-Planck-Institute for Chemical Ecology, Dept of Genetics and Evolution, Jena, Germany. twiehe@ice.mpg.de|Max-Planck-Institute for Chemical Ecology, Dept of Genetics and Evolution, Jena, Germany. twiehe@ice.mpg.de|Max-Planck-Institute for Chemical Ecology, Dept of Genetics and Evolution, Jena, Germany. twiehe@ice.mpg.de