Convergent evolution of insect hearing organs from a preadaptive structure

Flies of the taxon Emblemasomatini (Sarcophagidae: Diptera) independently e volved an ear with the same anatomy and location as the Ormiini (Tachinidae : Diptera). Both ears represent a first case of convergent evolution of hom ologous insect ears, which raises the question for a preadaptation Physiolo gical and anatomical data indicate a preadaptive-sound-insensitive, but vib ration-sensitive scolopidial chordotonal organ in non-hearing flies. As sel ective pressure for the evolutionary transformation from a vibration receiv er into a sound receiver, fast and precise cues for the localization and de tection of the sound producing hosts can be presumed.