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Lasioglossum malachurum : ウィキペディア英語版 | Lasioglossum malachurum
''Lasioglossum malachurum'' is a small European halictid bee. This species is obligately eusocial, with queens and workers, though the differences between the castes are not nearly as extreme as in honey bees. Early taxonomists mistakenly assigned the worker females to a different species from the queens. They are small (~1 cm), shiny, mostly black bees with off-white hair bands at the bases of the abdominal segments.〔 ''L. malachurum'' is one of the more extensively studied species in the genus ''Lasioglossum'', also known as sweat bees. Researchers have discovered that the eusocial behavior in colonies of ''L. malachurum'' varies significantly dependent upon the region of Europe in which each colony is located. == Taxonomy & phylogeny == ''L. malachurum'' was described by the entomologist William Kirby in 1802. This species of bees fall within the genus ''Lasioglossum'', which is the largest bee genera.〔 ''Lasioglossum'' falls within the family Halictidae, which includes small to midsize bees and is commonly referred to as the sweat bee family because Halictidae are frequently attracted to human perspiration.〔(【引用サイトリンク】publisher=Missouri Department of Conservation )〕 ''L. malachurum'' falls within the order Hymenoptera, a large order of generally winged insects containing wasps, bees, and ants. One species of ''lasioglossum'' that is closely related to the L. malachurum is ''L. hemichalceum.'' ''L. malachurum'' bees is a Western Palaearctic species and can be found across Southern England and the Channel Islands, most of continental Europe, and North Africa.
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