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Illinois  Data Point - Aristotelia roseosuffusella

Illinois Data Point - Aristotelia roseosuffusella
Fairfield, Wayne County, Illinois, USA
June 17, 2010
Attracted to my garage light.


A. roseosuffusella
In Braun's description of Aristotelia devexella, she diagnosed the species as follows:

“This species is distinguished by the oblique fascia at three-fourths, which replaces the opposite costal and dorsal spots of allied species; it is also much larger than any of the closely allied species.”

Your moth clearly has the opposing spots, rather than the single white slash seen in the image of A. devexella here. As also seen in that photo, the white markings in the middle of the forewing of A. devexella cover the entire width of the wing, interrupting the brown posterior area so as to form almost a continuous loop, whereas in A. roseosuffusella these white markings end well short of interrupting the brown area, as seen in your moth.

Finally, A. devexella was described from Waterton Lakes, Alberta, Canada; it therefore is a western moth that almost certainly does not occur in Illinois.

Given all of the above, your moth is best diagnosed as Aristotelia roseosuffusella.

Much thanks

Much welcome
I forgot to provide the citation for Braun's description of A. devexella, in case you want to check it out. It is in:

Braun, A. F. 1925. New Canadian microlepidoptera. The Canadian Entomologist 57(5): 124-127.

The Canadian Entomologist can be viewed online here.

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