Augochlora aurifera

Cockerell, 1897

Auriferous Green Sweat Bee

Augochlora aurifera is a metallic green sweat in the , described by Cockerell in 1897. As a member of the tribe Augochlorini, it exhibits the characteristic bright metallic coloration common to this group. The is distributed across North America and Middle America. Like other Augochlora species, it is presumed to be solitary or primitively social, though specific behavioral details for A. aurifera remain poorly documented compared to better-studied such as Augochlora pura.

Augochlora aurifera by the Smithsonian. Used under a CC0 license.

Pronunciation

How to pronounce Augochlora aurifera: /aʊˈɡɒkləɹə ˈɔːɹɪfərə/

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Identification

Augochlora aurifera cannot be reliably distinguished from Augochlorella and Augochloropsis by external appearance alone; microscopic examination of morphological characters is required. Within Augochlora, separation from A. pura and other requires expert taxonomic analysis. The metallic coloration distinguishes the group from non-metallic halictids, but not from cuckoo () or other metallic such as Agapostemon.

Images

Appearance

Small with bright metallic green, blue-green, or golden-green . Members of the Augochlora are virtually identical in external appearance to related genera Augochlorella and Augochloropsis, requiring microscopic examination for definitive identification. The name "aurifera" (gold-bearing) suggests a particularly golden or brassy metallic sheen may be characteristic. Females possess scopae (pollen-collecting hairs) on the hind legs.

Habitat

Specific preferences for A. aurifera are undocumented. Related Augochlora nest in rotting wood or soil, suggesting forested or wooded environments with suitable nesting substrates. The species has been documented in mark-recapture studies conducted in game lands near Raleigh, North Carolina, indicating occurrence in mixed natural habitats.

Distribution

North America and Middle America. Documented from the eastern United States (North Carolina) and presumably ranging more broadly across the continent based on GBIF records.

Seasonality

Active during summer months. Documented in mark-recapture sampling during July-August 2020 in North Carolina.

Life Cycle

Presumed solitary or primitively social based on -level traits, but specific details for A. aurifera are undocumented. Related construct nest provisioned with pollen and nectar, with larvae developing within these cells before pupating and emerging as .

Behavior

Specific of A. aurifera are undocumented. Females of related forage on diverse flowering plants and may visit human perspiration for salts.

Ecological Role

Presumed based on -level characteristics and documented pollen collection in .

Human Relevance

Included in mark-recapture studies evaluating sampling methodologies, contributing to understanding of detectability and estimation techniques for wild bees.

Similar Taxa

Augochlora puraCongeneric with overlapping range; external nearly identical, requiring microscopic examination for separation
Augochlorella spp.Member of same tribe with virtually identical metallic green appearance; -level identification requires dissection and microscopic analysis
Augochloropsis spp.Member of same tribe with virtually identical metallic green appearance; -level identification requires dissection and microscopic analysis
Agapostemon spp.Metallic green halictid with similar appearance; males of Agapostemon have banded black and yellow , distinguishing them from most Augochlora
Chrysididae (cuckoo wasps)Similar metallic coloration and size; distinguished by (seldom on flowers, quick jerky movements), lack of pollen-collecting structures, and different body proportions

More Details

Taxonomic challenges

The tribe Augochlorini presents significant identification challenges, with Augochlora, Augochlorella, and Augochloropsis being morphologically convergent. Augochlora aurifera specifically is less well-documented in the literature than the more common A. pura, and many ecological statements about 'Augochlora' in general sources may not apply to this .

Research significance

Augochlora aurifera was included as one of the 'green sweat ' in a 2020 mark-recapture study validating bee sampling protocols, indicating its use as a representative for this common but taxonomically difficult group.