LACK OF CALLING SONG DISPLACEMENT BETWEEN 2 CLOSELY-RELATED GROUND CRICKETS

Thorough examinations of purported cases of reproductive character dis placement are critical for reaching an understanding of the role of re inforcement in the evolution of reproductive barriers between closely related species. In this paper, we report the results of an extensive investigation of male calling song variation in the ground crickets, A llonemobius fasciatus and A. socius. Contrary to the results of an ear lier study, we uncovered little evidence of displacement of songs in a reas of overlap. We discuss explanations for the lack of displacement as well as for the discrepancies between the results of the current st udy and those of the earlier study.