| behavioural, ecological and genetic evidence confirm the occurrence of host-associated differentiation in goldenrod gall-midges. | host-associated differentiation (had) is considered a step towards ecological speciation and an important mechanism promoting diversification in phytophagous insects. although the number of documented cases of had is increasing, these still represent only a small fraction of species and feeding guilds among phytophagous insects, and most reports are based on a single type of evidence. here we employ a comprehensive approach to present behavioural, morphological, ecological and genetic evidence f ... | 2009 | 19243490 |