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Photo#28725
Agapostemon texanus angelicus (Halictidae) in the Colorado Rockies. - Agapostemon - female

Agapostemon texanus angelicus (Halictidae) in the Colorado Rockies. - Agapostemon - Female
Hoosier Pass at 11600 ft (N39° 21.709',W106° 03.767°), Summit County, Colorado, USA
August 18, 2005
Size: L = 10 mm
Found on Senecio atrata.

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Agapostemon texanus angelicus (Halictidae) in the Colorado Rockies. - Agapostemon - female Agapostemon texanus angelicus (Halictidae) in the Colorado Rockies. - Agapostemon - female Agapostemon texanus angelicus (Halictidae) in the Colorado Rockies. - Agapostemon - female

angelicus and texanus are different species
females are indistinguishable

note -us species name endings

interesting to find it above 11,000 ft.

 
Agapostemon with Greek - on neuter ending.
so, -um is my Latin neuter preference. Since female angelicum and texanum are indistingishable, some authors call this species the way I have above.

 
the -us ending is correct
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