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I need help with this species of Anthomyiidae. Could not associate it reliably with any genus. Collected: 20.06-18.07.1917, Malaise trap, North-west Russia (Murmansk province, Lapland Nature Reserve). Size ca 5 mm.
Hopefully, genitalia figures will help.

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Genitalia, lateral view.

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Cerci and surstyli, caudal view.

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Sternite V.

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At first sight, I don’t see any resemblanche with a possible genus or species I know.
Given the environment you found this specimen, we have to take in account that it could be a new species.
We can see a very large pregonite and the end of the distiphallus seems not sclerotized.
There are some genera in my mind, but for now I am thinking about a possible Phorbia species.
I attached one of your photos, where I can see a small seperate part…
Could this have belonged to the distiphallus…?
If so…..than it could confirm this species belongs to Phorbia.


Johanna

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Johanna, thank you very much!
I'll try to clear this part of the genitalia to check if we can see more details. Are there other important characters I could check?

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Here it is.

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Nicely cleaned!
I am almost sure this species could be Zaphne lineatocollis (Zetterstedt, 1838)(known from Lappland/Finnland).
Maybe you can check some other characteristics:

Acrostichals not strong, more hair like and in 4 irregular rows, prealar almost equal to posterior notopleural seta, notopleural area with one or two small hairs, mentum of proboscis black shining, midtibia with one av seta, hindtibia with 3 av, about 6 ad (with one longer), 3 pd and no pv setae.

Johanna

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Great!

Though, some characters seem to disagree: notopleural area with no hairs, hind tibia with 5-6 ad, but with 2-3 longer ones.

Anyhow now I know where to dig. Thank you very much!

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Dear Johanna,

recently I had a possibility to compare this specimen with the description of Z.lineatocollis by Griffiths. Now I can confirm your identification.
Thank you once more for your assistance.

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Nice..!

Johanna