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Diptera.info :: Identification queries :: Diptera (adults)
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Small flies on fungus, Germany
Pristurus
#1 Print Post
Posted on 17-11-2014 10:21
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Location: Marburg/Germany
Posts: 853
Joined: 07.07.10

found on 2014-09-22 running on fungus in a forest near Marburg. Regards, Ingo

Video: https://commons.w...09-22.webm
Pristurus attached the following image:


[108.08Kb]
Edited by Pristurus on 17-11-2014 10:23
My diptera videos: http://commons.wikimedia.org/wiki/User %3APristurus/gallery/Diptera
 
http://commons.wikimedia.org/wiki/User:Pristurus
Paul Beuk
#2 Print Post
Posted on 17-11-2014 16:10
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Location: Netherlands
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I cannot be certain from these images, but perhaps Acarthophthalmus nigrinus?
Paul

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mossnisse
#3 Print Post
Posted on 17-11-2014 17:09
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Location: Sweden, UmeƄ
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My guess is Chymomyza costata
 
http://www.norrlandsnatur.se/litt_base/
Ectemnius
#4 Print Post
Posted on 17-11-2014 17:39
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Location: The Netherlands
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The three backward curving f-bristles and the darkened front margin of the wing point to Acartophthalmus. (without an h after the p, nasty name... Pfft)
specimens I observed are standing high on the legs like the one shown in the photo and the front coxa are pale, also shown in the above photo's.
Also, they are common on rotting funghi in the early autumn.

So I'd agree with Paul.

Greetings,

Ectemnius
 
Pristurus
#5 Print Post
Posted on 19-11-2014 01:05
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Location: Marburg/Germany
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Thank you very much. Well, I have never seen them on fungi before. Males seem to use the fungi as lek mating arena....
My diptera videos: http://commons.wikimedia.org/wiki/User %3APristurus/gallery/Diptera
 
http://commons.wikimedia.org/wiki/User:Pristurus
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