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Diptera.info :: Identification queries :: Diptera (adults)
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Drosophilidae? => Drosophila (unimaculata?)
sbushes
#1 Print Post
Posted on 29-11-2021 14:35
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Shrewsbury 28/11
hiding in leaf litter
didn't fly, preferred to run around hiding

If Drosophilidae, seems to key to Drosophilinae : Scaptodrosophila deflexa perhaps ?
https://sites.google.com/view/mikes-insect-keys/mikes-insect-keys/keys-for-the-identification-of-british-true-flies-diptera/keys-for-the-identification-of-british-drosophilidae
sbushes attached the following image:


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Edited by sbushes on 29-11-2021 19:05
 
sbushes
#2 Print Post
Posted on 29-11-2021 14:36
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...
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sbushes
#3 Print Post
Posted on 29-11-2021 14:36
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sbushes
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Posted on 29-11-2021 14:37
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wing
sbushes attached the following image:


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sbushes
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Posted on 29-11-2021 14:37
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sbushes
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Posted on 29-11-2021 14:39
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Edited by sbushes on 29-11-2021 14:45
 
sbushes
#7 Print Post
Posted on 29-11-2021 14:45
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further images here :
www.inaturalist.o.../102144270
 
Jan Maca
#8 Print Post
Posted on 29-11-2021 18:29
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Difficult; oviprovector seems to be invaginated. Costal index is very high -about 4, so that I think it could be D. unimaculata.
 
sbushes
#9 Print Post
Posted on 29-11-2021 19:07
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Ok thanks Jan!
Is there anything further I should capture which might help resolve?
Or just a difficult one regardless of angle?
(still have the fly atm)
Edited by sbushes on 29-11-2021 19:07
 
Carnifex
#10 Print Post
Posted on 29-11-2021 19:15
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I don't see any infuscation in the wing for D. unimaculata. What about dark female D. suzukii?
Cheers, Lorin

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All requests are from the urban area of Vienna, if not otherwise stated.

My Diptera observations (and other living forms) can be found here, and corrections or comments over there would also be appreciated.
 
sbushes
#11 Print Post
Posted on 29-11-2021 20:19
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I've noticed my flash has bleached out visible infuscation at times. But on Mike's key the split to go to D.unimaculata vs D.suzuki seems to be 6 vs 8 rows of acrostichal hairs too, which would point more to the latter ?

Note also that the fly is darker to the eye than appears on many images above - thorax and abdomen appeared notably dark grey - closer to the 2nd and 4th image above. The other images are much more bleached / off colour than reality due to my poor photography skills and lack of post-production.
Edited by sbushes on 29-11-2021 20:23
 
Jan Maca
#12 Print Post
Posted on 30-11-2021 06:48
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I think that the oviprovector is more or less invaginated. White spots between oviscapt and last tergite are likely shines or (in last picture) some dust. Preparation of the abdominal end would decide.
Sometimes it cannot be decided if the number of acrostichals rows is six or eight and this character uses to be omitted from keys.
Conspicuously narrow wings (3rd and 4th picture) with high costal index suggest some Drosophila s.str.
 
sbushes
#13 Print Post
Posted on 02-12-2021 18:49
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Ok, thanks Jan, good to know
 
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