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Diptera.info :: Identification queries :: Diptera (adults)
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unknown hairy Muscid
Gateside
#1 Print Post
Posted on 07-04-2020 11:28
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Location: Cumbria, UK
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I believe this is a Muscidae. It has been suggested that the scutellum is deformed - it appears to form a half-cup shape rather than being relatively flat, or tilted.

I initially rejected Tachinidae because the wing venation is wrong. The images as a whole are probably not clear enough to use a key, so I hope someone can recognise the fly.

Size about 5 mm. Seen 04/04/2020, south Cumbria.
More images to follow.
Gateside attached the following image:


[110.13Kb]
 
Gateside
#2 Print Post
Posted on 07-04-2020 11:30
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A closer view of the front end.
Gateside attached the following image:


[159.88Kb]
 
Gateside
#3 Print Post
Posted on 07-04-2020 11:31
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A slightly different view of the front end.
Gateside attached the following image:


[113.33Kb]
 
Gateside
#4 Print Post
Posted on 07-04-2020 11:32
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A dorsal view.
Gateside attached the following image:


[136.28Kb]
 
John Carr
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Posted on 07-04-2020 14:00
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Thricops semicinereus?
 
http://www.flickr.com/photos/31715949@N00
Tony Irwin
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Posted on 07-04-2020 16:16
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I don't recall ever having seen a male with completely orange abdomen...
Tony
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Tony Irwin
 
Gateside
#7 Print Post
Posted on 07-04-2020 17:57
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I have just done a trawl through Diptera.info images, and agree with Tony about that point - no males with an all-orange abdomen.
I also think that mine has a more dished face than any I can see anywhere.

Nigel.

By the way, thanks for the good starting suggestion, Paul!
Edited by Gateside on 07-04-2020 19:34
 
John Carr
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Posted on 07-04-2020 18:16
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Hydrotaea meridionalis? That white spot by the antennae made me think Azeliini, and H. meridionalis is another bicolored species.
 
http://www.flickr.com/photos/31715949@N00
Nikita Vikhrev
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Posted on 07-04-2020 19:38
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Dear friends, I also tried to solve this mystery in the morning. Now I'm back, but still without answer so far.
Nikita Vikhrev - Zool Museum of Moscow University
 
Gateside
#10 Print Post
Posted on 07-04-2020 20:08
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John Carr wrote:
Hydrotaea meridionalis? That white spot by the antennae made me think Azeliini, and H. meridionalis is another bicolored species.


An interesting suggestion, John. But I can't find any images of a male, but just females.
I am pretty sure that the white thing at the top of the antennae is a clump of pollen, similar to some of the larger blobs on the thorax.

I see there is a thread at https://diptera.info/forum/viewthread.php?thread_id=45541
I don't think there was a conclusion to this post! ... though it was a female, not a male.

Nigel
 
Nikita Vikhrev
#11 Print Post
Posted on 07-04-2020 20:38
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H. meridionalis looks similar to H. borussica https://diptera.info/photogallery.php?photo_id=3309
John's idea was good, but I doubt that it is answer. I have a lot of material with me (for co-quarantine: me+Diptera). In H. irritance group f3 and t3 should be strongly curved.
Muscid on these imags looks as Lophosceles hians with dark legs https://diptera.info/photogallery.php?photo_id=6268
Sorry, I have no idea.

Nikita Vikhrev - Zool Museum of Moscow University
 
johnes81
#12 Print Post
Posted on 07-04-2020 20:57
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Hi everyone,

the white spot is similar to Hydrotaea pellucens. borussica and meridionalis males have a very noticeable brush of feathery bristles sticking out of the middle of the hind tibia. I think that Hydrotaea pellucens is a better match. The photos posted are ridiculously small for debating features, so the author of the post will have to examine larger photos for comparison to Hydrotaea pellucens.

Best wishes,
John
John and Nini. Naturalists not experts.
 
Tony Irwin
#13 Print Post
Posted on 07-04-2020 21:58
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I have trouble seeing this as a Hydrotaea - the legs seem to me to be too simple and lack the modifications typical of that genus.
Tony
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Tony Irwin
 
Waldgeist
#14 Print Post
Posted on 08-04-2020 00:59
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Looks like Fanniidae or Anthomyiidae, not Muscidae.
 
www.inaturalist.org/people/waldgeist
John Carr
#15 Print Post
Posted on 08-04-2020 01:08
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Waldgeist wrote:
Looks like Fanniidae or Anthomyiidae, not Muscidae.


It appears to have 4 postsutural dorsocentrals, Sc bent as usual in Muscoidea, A1 ending halfway to wing margin, and A2 not curved enough to meet the extension of A1.
 
http://www.flickr.com/photos/31715949@N00
Gateside
#16 Print Post
Posted on 08-04-2020 08:41
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Nikita Vikhrev wrote:
H. meridionalis looks similar to H. borussica https://diptera.info/photogallery.php?photo_id=3309
John's idea was good, but I doubt that it is answer. I have a lot of material with me (for co-quarantine: me+Diptera). In H. irritance group f3 and t3 should be strongly curved.
Muscid on these imags looks as Lophosceles hians with dark legs https://diptera.info/photogallery.php?photo_id=6268
Sorry, I have no idea.


I have looked at the image of Lophosceles hians, and (apart from the yellow legs!) looks very similar, except that mine has at least 2 prominent spines in the middle of the hind tibia, but the photo specimen does not have any in the middle. So I suggest it's probably not that species.

I have looked at my images of the legs in case this is useful, and it's difficult to see properly in poor light (in the shade of a huge Picea pungens!), so this is the best photo, post-processed.
Gateside attached the following image:


[145.3Kb]
Edited by Gateside on 08-04-2020 08:43
 
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