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A statistical method for evaluating systematic relationships
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Were workers of eusocial hymenoptera initially altruistic or oppressed?
Studies of a primitively eusocial halictid bee, Lasioglossum zephyrum, strongly suggest that a major factor in originating a worker caste is selection at the individual level for queens that controlExpand
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The oldest fossil bee: Apoid history, evolutionary stasis, and antiquity of social behavior.
Trigona prisca, a stingless honey bee (Apidae; Meliponinae), is reported from Cretaceous New Jersey amber (96-74 million years before present). This is about twice the age of the oldest previouslyExpand
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The Brazilian bee problem.
There have been repeated and sometimes lurid references to the introduction of African honey bees into South America, to the spread of such bees or their hybrid descendants (Africanized bees, i.e.Expand
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Dual origin of highly social behavior among bees.
A study of behavior and structure indicates that highly eusocial behavior arose twice in the bees--i.e., in the stingless bees (Meliponinae) and in the honeybees (Apinae). Morphological featuresExpand
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A Trigona from late Cretaceous amber of New Jersey (Hymenoptera, Apidae, Meliponinae). American Museum novitates ; ; no. 2917.
Trigona prisca new species is based on a fossil worker in Late Cretaceous amber from Kinkora, New Jersey. T. prisca is placed in the subgenus Trigona s. str. and is remarkably similar to T. (T.)Expand
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Individual odor differences and their social functions in insects.
The evolution of individual or subgroup differences in odors of halictine bees is suggested from possible widespread intraspecific variation in pheromones. An important result of such variation mayExpand
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Interaction among workers from different colonies of sweat bees (Hymenoptera, Halictidae).
Summary Lasioglossum versatum , a bee whose colonies occur in small, dense aggregations, shows tolerance and some interactions among individuals of different colonies and thus social activity at aExpand
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Interactions in Colonies of Primitively Social Bees: Artificial Colonies of Lasioglossum zephyrum.
Lasioglossum zephyrum usually lives in small colonies but is facultatively solitary. Lone bees and colonies produced from female pupae of the same generation were established in artificial indoorExpand
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