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Arcutelphusa talladega, 1874.1 - Arcutelphusa talladega

Arcutelphusa talladega, 1874.1 - Arcutelphusa talladega
Raleigh, Wake County, North Carolina, USA
July 20, 2011
First for NC. First for Falls Lake, and new for bugguide! This is a newly described species.

Moved from ID Request. Tenatative. Move based on photo ID by Dr. Lee.

Please Compute Forewing Length
..... count threads on sheet. Is this the only view of the moth that is available?

I have another photo of the same position, but the moth is not quite as in focus while you can see the sheet much better. I counted and come up with about 18 threads for the length, which I am guessing would be 1.8cm

My thread count comes to 15-16.........
..... just for the forewing, not including the head of the moth. Now you need to go to the actual sheet and measure 15 and 18 threads very carefully.

Your moth is superficially similar to Arcutelphusa talladega, which was described from just a few specimens from east-central Mississippi and extreme southern Alabama. The relatively large dark marking near the wingtips of your moth are not seen in the type specimen, but that does not rule out the possibility of your moth being of that species. Neither does your locality. We have photos of a "deep south" undescribed Gelechiid moth also from North Carolina. Ranges of these moths are imperfectly known.

The forewing length of specimens in the type series is between 8.5 - 10 mm. If your moth differs substantially from that range of measurement it might suggest that your moth is something else.

Try to measure the actual sheet. If the threads counted actually measures between 7-12 mm, then we might be justified in tentatively calling your moth Arcutelphusa talladega.

It would be a good idea to continue looking for this moth and taking specimen(s) if it is found again. Specimens should be sent to SangMi Lee at Mississippi Entomological Museum. She will examine the genitalia and determine with certainty the species identification.

I did send my photo to Sangmi Lee, no specimen as I did not know the rarity of this species at the time I saw it, and Sangmi confirmed that it was this species. I will take a measurement of my sheet and get back to you about how long it actually is. If I see it again I will capture it. Can you also direct me to a link for the pic of the undescribed Gelechid.
Thank you

It appears
that the length of the moth's wings were about half a cm. I couldn't get an accurate measurement, because the strings were almost too small for me to see, but this is the closest I could get.

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