%0 Journal Article %T Repeated origins of social parasitism in allodapine bees indicate that the weak form of Emery's rule is widespread, yet sympatric speciation remains highly problematic %A Smith, Jaclyn A. %A Chenoweth, Luke B. %A Tierney, Simon M. %A Schwarz, Michael P. %J Biological Journal of the Linnean Society %V 109 %N 2 %P 320-331 %@ 0024-4066 %D 2013-06-01 %I The Linnean Society of London %~ DeepDyve