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Diptera.info :: Identification queries :: Diptera (adults)
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Dialysis sp. (Xylophagidae) from USA
Isidro
#1 Print Post
Posted on 17-08-2019 19:35
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Location: Zaragoza, Spain
Posts: 1916
Joined: 26.04.07

Boston, Massachusetts.
24th July 2019.
On a forest edge.
Any help with specific ID appreciated! Thanks!

i.ibb.co/NtfWXc8/Dialysis-sp-2-24-7-19-Arnold-Arboretum.jpg

i.ibb.co/CVPfCjN/Dialysis-sp-1-24-7-19-Arnold-Arboretum.jpg
 
Isidro
#2 Print Post
Posted on 26-08-2019 07:01
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Location: Zaragoza, Spain
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Joined: 26.04.07

Hello! Nobody? Please help!
 
John Carr
#3 Print Post
Posted on 26-08-2019 13:00
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Eastern species in the revision by Webb (1978):

D. elongata has broad dark band along basal margins of tergites and cell m3 absent.

D. fasciventris has broad dark band along basal margins of tergitess and cell m3 present or rarely reduced.

D. rufithorax has median spots at bases of tergites not reaching lateral margins and cell m3 present.
 
http://www.flickr.com/photos/31715949@N00
Isidro
#4 Print Post
Posted on 26-08-2019 21:47
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Location: Zaragoza, Spain
Posts: 1916
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Thanks John. D. rufithorax can be discarded then. Can you give me a link to a image of a wing where cell m3 is signed? I looked at a general fly venation nomenclature, but the cells are not named, only the veins...
 
John Carr
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Posted on 26-08-2019 21:56
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The short stub vein off the discal cell only in the left wing of this fly is vein M3 which forms the forward edge of cell m3 when present https://bugguide....04/bgimage
 
http://www.flickr.com/photos/31715949@N00
Isidro
#6 Print Post
Posted on 26-08-2019 22:15
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Location: Zaragoza, Spain
Posts: 1916
Joined: 26.04.07

Thanks John! Sadly in my image it's difficult to interpret, but I think that vein M3 would be as marked in red here. I think that this vein is absent, what would make this D. elongata... right? Or it's too risky to put this name?

i.ibb.co/pyhfqkL/cellm3.jpg
 
John Carr
#7 Print Post
Posted on 27-08-2019 00:14
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Location: Massachusetts, USA
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Isidro wrote:
Thanks John! Sadly in my image it's difficult to interpret, but I think that vein M3 would be as marked in red here. I think that this vein is absent, what would make this D. elongata... right? Or it's too risky to put this name?

i.ibb.co/pyhfqkL/cellm3.jpg


The red line is where M3 would be.
 
http://www.flickr.com/photos/31715949@N00
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