Lasioglossum leucocomum

(Lovell, 1908)

Lasioglossum leucocomum is a small metallic sweat in the subgenus Dialictus, one of the largest and most taxonomically challenging bee in North America. The was resurrected from synonymy in a 2010 revision of Canadian Dialictus, which recognized it as a valid species distinct from previously confused names. Like other Dialictus, it is a ground-nesting bee with variable social organization, ranging from solitary to small-colony sociality. The species contributes to pollination services in its native range.

Pronunciation

How to pronounce Lasioglossum leucocomum: //ˌlæziˈoʊɡlɒsəm ˌluːkoʊˈkoʊməm//

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Identification

Identification requires microscopic examination and reference to the 2010 revision of Canadian Dialictus, which provides descriptions and illustrated keys for both sexes. The species was previously confused under other names and can only be reliably distinguished from similar metallic Lasioglossum using the diagnostic characters provided in Gibbs (2010). Field identification to species is not feasible without specimen examination.

Appearance

A small with metallic coloration typical of the Dialictus subgenus. Body size and specific coloration details are not separately documented in available sources, but Dialictus generally exhibit green, blue, or bronze metallic . in size and facial structure is typical for the , with males generally smaller and possessing longer .

Habitat

Specific preferences are not documented for this . As a ground-nesting Dialictus, it likely occupies open, sunny areas with suitable soil for burrow excavation. Many Dialictus species favor sandy or loamy soils in meadows, prairies, or forest edges.

Distribution

Recorded from North America, including Vermont, USA. The was included in the Canadian revision, suggesting occurrence in Canada, though specific provinces are not stated in available sources. Historical confusion with other names complicates precise range delineation.

Diet

As with other Lasioglossum, likely feed on nectar and collect pollen from diverse flowering plants. Specific floral associations are not documented.

Life Cycle

Likely follows the general Dialictus pattern: females excavate subterranean nests with multiple , each provisioned with pollen and nectar before -laying. Some Dialictus exhibit eusociality with , but the social status of this particular species is not documented. Males typically emerge before females.

Behavior

Specific behaviors are not documented. As a ground-nesting , females likely exhibit solitary or small-colony nesting with nest defense and pollen-foraging typical of the .

Ecological Role

Contributes to wild pollination services. As a member of the most -rich bee in North America, it participates in pollination networks. Its specific ecological importance relative to other Dialictus species is not established.

Human Relevance

No specific human interactions documented. As a small, ground-nesting , it is unlikely to be a significant nuisance or agricultural relative to more common . Stings, if they occur, are generally mild.

Similar Taxa

Other Lasioglossum (Dialictus) speciesDialictus contains over 1,700 globally and 84 metallic species in Canada alone; most are externally similar and require microscopic examination for separation. L. leucocomum was specifically resurrected to resolve confusion with previously misidentified material.

More Details

Taxonomic history

The was originally described by Lovell in 1908 but was subsequently synonymized. Gibbs (2010) resurrected it from synonymy as part of a comprehensive revision that resolved numerous long-standing taxonomic problems in Canadian Dialictus. The revision noted that names had often been misapplied in past usage, sometimes subsuming multiple species, and that even did not always correspond to the same species as name-bearing types.

Research significance

L. leucocomum exemplifies the taxonomic challenges of Dialictus, a group described as 'one of the greatest challenges in ' despite being the most commonly collected bees in North America. The is part of a with the most diverse social systems of any equivalent insect group, making it relevant for studies of social evolution.