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Photograph taken on 17 /11 / 2020, trap of light for moths placed in house of the urban center of Motril, Granada, Spain
Immediate area of the Mediterranean coast.
Apparent size with wings, about 4,00 mm

Thanks in advance for any help!

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Hi, I think it could be a Chamaepsila sp. (Psilidae).

Greetings, Eric

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Thank you very much for your help.
With your proposal I will edit the title to see if they confirm it.
I will also try to take photos in more detail to help advance identification.

Best regards from southern Spain.
José Marín

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New photo
Clicking increases to 1200 dpi

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Hi José, it closely resembles what I identified as C. rosae. But unfortunately I do can't tell for sure which characters tell the species apart.

Greetings from Northern Bavaria, Eric

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And finally with this key (in german):
Identification Key of the Westpalaearctic Species of Chamaepsila (Diptera: Psilidae), Wang 1988:
2 scutellar bristles, 2 dorsocentrals, 3 verticals, thorax all black OK.
We cannot see the underside of the fore femora:
Fore femur with row of longer hairs ventrally? = nigricornis else rosae

Our flies seem to be C. nigricornis or rosae.

Greetings, Eric

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I am very grateful for your interest and the help you give me to identify this little dipteran.
I add two more photographs to try to show the details that distinguish the two Chamaepsila species that are in doubt.
I also comment that I have the collected specimen and that for me it is of no more interest than the photos that I can take of it. If you may have any interest or curiosity in receiving the insect, I can send it to you by post in a small eppendorg with 70% alcohol or 10% formaldehyde.
Kind regards,
Jose Marin

Clicking on the photo increases its size to 1200 dpi

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Clicking on the photo increases its size to 1200 dpi

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You have my address... ;)

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That's a very good idea and I'm looking very forward to the result.

Greetings, Eric

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Well, here is the result, after examination of the genitalia: Chamaepsila nigricornis. :)

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Paul, Very grateful for your help. :D :D :D

Kind regards from the South of Spain
José Marín