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Facultative social parasitism in the allodapine bee Macrogalea berentyensis

Insect Science 2007年第1期14卷 65-69页

作者： JACLYN A. SMITH School of Biological Sciences Flinders University Adelaide South Australia Australia

Previous research on social parasitism has largely ignored allodapine social parasites, which is surprising given the huge potential of these bees to provide a better understanding of social parasitism. Macrogalea berentyensis, a species that was previously suggested to be a social parasite, was collected in nests of M. ellioti, and also in nests consisting of only M. berentyensis. These f＇mdings, along with morphological and phylogenetic evidence, show that this species is a facultative social parasite. In the independently living M. berentyensis nests, brood were present that had been reared to an advanced stage, suggesting that：（i） these parasites may be effective at foraging and caring for their brood; or （ii） these nests may be colonies where all the hosts had died, and these parasites had yet to disperse. Macrogalea berentyensis is the closest relative of the facultative social parasite, M. antanosy, and both these species represent the most recent evolutionary origin of social parasitism within the allodapines. Further behavioral research on both these parasitic species would therefore have important implications for the understanding of the evolution of social parasitism.

关键词： allodapine bee facultative social parasitism Macrogalea

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New species and unexpected diversity of socially parasitic bees in the genus Inquilina Michener （Hymenoptera： Apoidea： Apidae）

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Insect Science 2009年第4期16卷 343-350页

作者： Jaclyn A. Smith Michael P. Schwarz Flinders University School of Biological Sciences Adelaide South Austrafia Australia

allodapine bees present particular problems for taxonomy due to a high level of morphological conservatism in adults, even between genera. However, this tribe of bees also presents a unique opportunity to explore the evolution of social parasitism because of the comparatively large number of origins of socially parasitic species. Morphological differences presented here, along with DNA sequence data and molecular phylogenetic analyses, indicate a much larger number of Australian social parasite species in the genus Inquilina than previously anticipated, and suggest that the final number of socially parasitic species may be considerable. We describe five new species and present sequence data that will help elucidate the delineation of further new species. Inquilina provides a unique opportunity to study the evolution of social parasitism in social insects, but further studies will need to encompass both population genetic and phylogenetic approaches.

关键词： allodapine bee molecular phylogenetics social parasite

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