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Diptera.info :: Identification queries :: Diptera (adults)
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Tachinidae> Dexia rustica (f)
Jan Wind
#1 Print Post
Posted on 30-03-2011 21:37
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Location: Ede, The Netherlands
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This one was seen 19 sept 2010 on Solidago flower field in forest area Planken Wambuis Netherlands.
Jan Wind attached the following image:


[42.15Kb]
Edited by Jan Wind on 05-04-2011 17:42
 
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Jan Wind
#2 Print Post
Posted on 30-03-2011 21:41
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Location: Ede, The Netherlands
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the r4+5 is open . there are 3 dc
Jan Wind attached the following image:


[37.98Kb]
 
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Jan Wind
#3 Print Post
Posted on 30-03-2011 21:42
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Location: Ede, The Netherlands
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also a picture from this side
Jan Wind attached the following image:


[34.52Kb]
 
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ChrisR
#4 Print Post
Posted on 30-03-2011 22:07
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Looks like Dinera grisescens to me Smile
Manager of the UK Species Inventory in the Angela Marmont Centre for UK Biodiversity at the Natural History Museum, London.
 
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Jan Wind
#5 Print Post
Posted on 30-03-2011 22:38
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Location: Ede, The Netherlands
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That is what I first thought but it does not match as r5 is not closed at the wingedge nor does it show a sort petiole
see photo detail of the wing.
Jan Wind attached the following image:


[29.07Kb]
 
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ChrisR
#6 Print Post
Posted on 30-03-2011 23:03
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Well, it;s either that or Dexiosoma caninum Smile
Manager of the UK Species Inventory in the Angela Marmont Centre for UK Biodiversity at the Natural History Museum, London.
 
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neprisikiski
#7 Print Post
Posted on 31-03-2011 14:54
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Location: Lithuania
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I think, it is Dexia rustica, because in Dexiosoma hind margins of tergites are undusted.
Erikas
 
Zeegers
#8 Print Post
Posted on 31-03-2011 17:05
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Location: Soest, NL
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Dexia is hardly possible in the Netherlands and the arguments to reject Dinera grisescens are not decisive: topcell is very variable in this species.
Need to look into this further


Theo
 
neprisikiski
#9 Print Post
Posted on 31-03-2011 18:27
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Location: Lithuania
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I can see rather long shadow fold on the angle of medial vein; yellow scutellum at tip; syntergite 1+2 hollowed much further than in grisescens....

Erikas
 
Zeegers
#10 Print Post
Posted on 31-03-2011 21:26
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Location: Soest, NL
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Erikas, your points are well noted and valid, certainly the last,

I did not have time to check the pictures thoroughly and I guessed that they might be misleading, however, they are not.

To call Dexia rustica from NL I need to be very sure.

I'll check the collection (but currently I think you might be right !)

Theo
 
Jan Wind
#11 Print Post
Posted on 31-03-2011 22:23
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Location: Ede, The Netherlands
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Thank you Chris, Erikas and Theo for the insights. I have also a series form the same day in the same area of what I think is a male Dexia rustica which I will enter as a new thread.

kind regards,
Jan Wind
 
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Zeegers
#12 Print Post
Posted on 01-04-2011 08:56
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Location: Soest, NL
Posts: 18603
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Erikas has totally convinced me.

In the last century, we have had 4 records of Dexia rustica in NL. That explains my caution. Last record 1973. Good news that all known localities are from the Veluwe, where this one was found as well.
Of course, the male in the other post settles all discussions.

And yes, Dexia rustica is much more common in the south and in the east, so I'm not surprised it is common in Lithuania.


Theo
 
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