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Phaeoura utahensis - Phaeoura perfidaria - male

Phaeoura utahensis - Phaeoura perfidaria - Male
Rockville, Washington County, Utah, USA
August 14, 2020
Size: 36 mm wingspan
I think this is Phaeoura utahensis. Am I correct? Or can I only go to Phaeoura sp?

Moved from ID Request. After comparing hindwings of perfidaria and utahensis, I now believe this is perfidaria. According to Rindge (1961), the median shade line is absent on utahensis.

Thank you
Thank you for your help!

or perfidaria
Rindge (1961) shows both species as possible in Utah and I frankly do not think I can separate the two species based upon photos. Anyway, I have added a page for utahensis here at BugGuide and created links to the Rindge document if anyone wants to pursue further.

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