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The sweat bee genus ''Lasioglossum'' is the largest of all bee genera, containing over 1700 species in numerous subgenera worldwide.〔Gibbs, J., et al. (2012). (Phylogeny of halictine bees supports a shared origin of eusociality for ''Halictus'' and ''Lasioglossum'' (Apoidea: Anthophila: Halictidae). ) ''Molecular Phylogenetics and Evolution'' 65(3), 926-39.〕〔Ascher, J. S. and J. Pickering. 2011. (Discover Life bee species guide and world checklist (Hymenoptera: Apoidea: Anthophila). )〕 They are highly variable in size, coloration, and sculpture; among the more unusual variants, some are cleptoparasites, some are nocturnal, and some are oligolectic. Most ''Lasioglossum'' nest in the ground, but some species nest in rotten logs. The genus ''Lasioglossum'' can be divided into two informal series based on the strength of the distal veins of the forewing.〔Michener, C.D. (2000). ''The Bees of the World''. Johns Hopkins University Press. 913 pp.〕 The ''Lasioglossum'' series (or strong-veined ''Lasioglossum'') is mostly composed of solitary or communal species. Two possible exceptions are ''L. aegyptiellum'' and ''L. rubricaude'', both of which show signs of division of labour indicative of eusociality. The ''Hemihalictus'' series (or weak-veined ''Lasioglossum'') includes species with a wide range of sociality.〔Michener, C.D. (1974). ''The Social Behavior of the Bees''. Harvard University Press. 404 pp.〕 The ''Hemihalictus'' series is composed of species which are solitary, communal, semisocial, primitively eusocial, cleptoparasitic, or socially parasitic. Eusocial species may have small colonies with only one or a few workers or large colonies with dozens of workers. The largest colony sizes occur in ''L. marginatum'', which forms perennial colonies lasting five or six years, with hundreds of workers. ==Subgenera== A list of subgenera (modified from Michener's ''Bees of the World''): ''Lasioglossum'' series: ''Australictus'', ''Callalictus'', ''Chilalictus'', ''Ctenonomia'', ''Echthralictus'', ''Glossalictus'', ''Homalictus'', ''Lasioglossum s. str.'', ''Leuchalictus'', ''Oxyhalictus'', ''Parasphecodes'', ''Pseudochilalictus'', ''Rubrihalictus'', ''Urohalictus''. ''Hemihalictus'' series: ''Acanthalictus'', ''Austevylaeus'', ''Dialictus'', ''Evylaeus'', ''Hemihalictus'', ''Paradialictus'', ''Sellalictus'', ''Sphecodogastra'', ''Sudila''. Subgeneric classification of ''Lasioglossum'' remains controversial, with disagreement among experts on the number and extent of subgenera. Two of the better-known species are the European ''Lasioglossum malachurum'' and the North American species ''Lasioglossum zephyrum''. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Lasioglossum」の詳細全文を読む スポンサード リンク
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