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Anthomyidae I think - is it possible to get clooser? Body length 3,5 mm. From a sandy, coastal area in south Sweden 23 april.

Sorry for bad pictures! I can try to make better later if it helps.

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Other view.

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other view.

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And another.

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I need some time to look at this one.......and rule out some possibilities.

Johanna

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Ok, thanks for respons! Tell me if if you need to see more details.

Krister

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Krister, check Egle

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Thanks! Here is a better picture of genitalia. I have no experience but I am not sure it fits so well to Egle?

Krister

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At first sight, I think this could be Phorbia nuditibia.
The lower side of the scutellum should be without the typical small hairs for Anthomyiidae and midtibia without av seta.

Johanna

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Interesting - nuditibia is not recorded in Sweden so far after what I can see (if there isn´t a synonyme that could be used in the Swedish species list). I can´t see any small hairs on lower side of scutellum. But I am not sure about av seta on midtibia as I have problem to recognise it. I will try to get a photo on mid tibia in a while.

What is the cloosest alternative to nuditibia?


Krister

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I think we can be sure it is Phorbia.
Looking at the shape of the phallus in combination with the shape of the V sternite and cerci/surstyly, I only can say for now...it most resemble P. nuditibia.
(which is a valid name) and till now only found in Britain.
Could I make a mistake with a similar species.....yes, because identification from photos always can be tricky!
In this case, I could be mistaken with P. moliniaris but than there should be a strong pv apical on the hind tibia (which is not present in P. nuditibia).
Just take your time with this one.....if you can you can make some more photos, but when it gets to difficult....just send it to me.

Johanna

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Yes, I really understand that it is difficult to say for sure from photos - and appreciate your good help! Mostly I deal with Hymenoptera and I have a lot to learn about Diptera morphology, and for me it is very difficult to localize different seta on the legs so far.

Here is a photo on hint tibia - is it good enough?

Krister

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And here a photo of mid tibia.

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I can't see it properly, so I think I will make some microscopic photos of those hairs.
If you know where to look at, it will be easier to find it.
It will take some time (maybe a week or longer) .....but the fly it pinned, so it will not fly away in the meantime.

Johanna

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Thanks a lot - it would be very informative for me! And no hurry at all!

Krister

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It is a long time ago, having posted a photo on Diptera.info, so I hope it will show..

I have made a drawing instead of photos.
On this drawing we can see the position of the setae on the tibia.
In your case we have to look for the av seta on the midtibia and the apical pv seta…...which both should not be present.
In Phorbia moliniaris there are two ad setae present (one strong and one above which is les strong) and one av seta on the midtibia…….and a small short but strong apical pv seta (which is very difficult to see)

If you still have some doubts to interpret those setae…...just try to collect coming spring more specimen and send them to me.

I hope this will help for now….

Johanna

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Great - many thanks, and very illustrative! I will study the fly clooser later and tell the result.

Krister