Extreme male leg polymorphic asymmetry in a new empidine dance fly (Diptera: Empididae).

Abstract

A new dance fly (Empididae: Empidinae) with hugely modified male fore tarsus, either on the right, left, both or neither sides, is described from Japan. Such massive polymorphic asymmetry occurring with so high an incidence in a population is previously unreported. In view of the courtship behaviour of other Empidinae, we hypothesize that the oversized tarsus is a secondary sexual character employed by males for attracting females. Alternative hypotheses are also discussed. We suggest that this extraordinary new species is a potential model for the study of mating biology in Empidinae and the evolution of mating systems in general.

DOI: 10.1098/rsbl.2010.0726

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Cite this paper

@article{Daugeron2011ExtremeML, title={Extreme male leg polymorphic asymmetry in a new empidine dance fly (Diptera: Empididae).}, author={Christophe Daugeron and Adrian R. Plant and Isaac S. Winkler and Andreas Martin Stark and Michel Baylac}, journal={Biology letters}, year={2011}, volume={7 1}, pages={11-4} }