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Diptera.info :: Identification queries :: Diptera (adults)
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Ephydridae ID
Carnifex
#1 Print Post
Posted on 09-10-2019 21:25
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Location: Vienna, Austria
Posts: 863
Joined: 23.06.15

Hi,
this small (2mm) fly was found on Phragmites near a fishpond in Burgenland/Austria.
I noticed a strong bristle at the base of the flagellum.

static.inaturalist.org/photos/53670344/large.jpeg
static.inaturalist.org/photos/53670360/large.jpeg
static.inaturalist.org/photos/53670379/large.jpeg
Edited by Carnifex on 09-10-2019 23:31
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.
 
John Carr
#2 Print Post
Posted on 09-10-2019 23:10
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Location: Massachusetts, USA
Posts: 7387
Joined: 22.10.10

Ephydridae (arista with hairs only dorsally)
 
http://www.flickr.com/photos/31715949@N00
Carnifex
#3 Print Post
Posted on 09-10-2019 23:30
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Location: Vienna, Austria
Posts: 863
Joined: 23.06.15

Thanks, I will try the British Key, hope it works for central Europe as well.
Also, adjusted the title
Edited by Carnifex on 09-10-2019 23:31
Cheers, Lorin

Font Color
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.
 
Nikita Vikhrev
#4 Print Post
Posted on 10-10-2019 21:30
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Location: Moscow, Russia
Posts: 8181
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Psilopa, I think
Nikita Vikhrev - Zool Museum of Moscow University
 
Carnifex
#5 Print Post
Posted on 18-10-2019 16:13
Member

Location: Vienna, Austria
Posts: 863
Joined: 23.06.15

Using the British key, I am passing Psilopa and reaching Athyroglossa. Does that look reasonable?
Cheers, Lorin

Font Color
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.
 
John Carr
#6 Print Post
Posted on 18-10-2019 16:16
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Location: Massachusetts, USA
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Joined: 22.10.10

In the American key,

Posterior margin of postgena meeting occiput at acute angle; postgena with fine pale setulae. Mostly or entirely shiny black species, with setation much reduced ... Athyroglossa and Platygymnopa

Posterior margin of postgena meeting occiput at obtuse and broadly rounded angle; postgena usually with coarse black setulae. Shiny to dull species with setation usually well-developed ... other genera including Psilopa
 
http://www.flickr.com/photos/31715949@N00
Carnifex
#7 Print Post
Posted on 18-10-2019 16:23
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Location: Vienna, Austria
Posts: 863
Joined: 23.06.15

It's shiny black surface makes it difficult to spot setae, but it doesn't seem to have coarse black setulae at the postgena.
On the thorax, there are about 8-10 nicely separated rows of fine setae.
What does the term 'Face wrinkled below the protuberance' mean, where do I have to look?
Cheers, Lorin

Font Color
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.
 
Tony Irwin
#8 Print Post
Posted on 18-10-2019 18:23
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Location: Norwich, England
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Vein R2+3 is much longer in Athyroglossa - I'm inclined to favour Psilopa, but it's difficult to say from photos. We'll need better lighting and focus to take this one further, I think.
Tony
----------
Tony Irwin
 
Carnifex
#9 Print Post
Posted on 19-10-2019 21:19
Member

Location: Vienna, Austria
Posts: 863
Joined: 23.06.15

Ok, trying to take this thing further Smile

But first, I have to admit I am struggling with the wording in the British key, namely at the decision at the path between Psilopa or others:

'Four sub-equal setae in front of the scutellum, the inner pair not being the last in the line of the innermost small ‘acrostichal’ hairs but with two rows of hairs between the inner pair of prescutellar setae'

I am not sure what the termn 'last' refers to.

Anyways, I hope the pictures provided (pre-scutellar bristles and minute diverging post-ocellar setae) are helpful for the ID

static.inaturalist.org/photos/54465334/large.jpeg
static.inaturalist.org/photos/54465352/large.jpg
Cheers, Lorin

Font Color
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.
 
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