Diptera.info :: Identification queries :: Diptera (adults)
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 Tachinidae> Dexia rustica (f)
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| Jan Wind |
Posted on 30-03-2011 21:37
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Member Location: Ede, The Netherlands Posts: 806 Joined: 24.10.10 |
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 |
Posted on 30-03-2011 21:41
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Member Location: Ede, The Netherlands Posts: 806 Joined: 24.10.10 |
the r4+5 is open . there are 3 dc
Jan Wind attached the following image:  [37.98Kb] |
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| Jan Wind |
Posted on 30-03-2011 21:42
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Member Location: Ede, The Netherlands Posts: 806 Joined: 24.10.10 |
also a picture from this side
Jan Wind attached the following image:  [34.52Kb] |
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| ChrisR |
Posted on 30-03-2011 22:07
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 Administrator Location: Reading, England Posts: 7699 Joined: 12.07.04 |
Looks like Dinera grisescens to me 
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 |
Posted on 30-03-2011 22:38
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Member Location: Ede, The Netherlands Posts: 806 Joined: 24.10.10 |
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 |
Posted on 30-03-2011 23:03
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Administrator Location: Reading, England Posts: 7699 Joined: 12.07.04 |
Well, it;s either that or Dexiosoma caninum
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 |
Posted on 31-03-2011 14:54
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Member Location: Lithuania Posts: 876 Joined: 23.02.09 |
I think, it is Dexia rustica, because in Dexiosoma hind margins of tergites are undusted.
Erikas |
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| Zeegers |
Posted on 31-03-2011 17:05
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Member Location: Soest, NL Posts: 18611 Joined: 21.07.04 |
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 |
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| neprisikiski |
Posted on 31-03-2011 18:27
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Member Location: Lithuania Posts: 876 Joined: 23.02.09 |
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 |
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| Zeegers |
Posted on 31-03-2011 21:26
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Member Location: Soest, NL Posts: 18611 Joined: 21.07.04 |
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 |
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| Jan Wind |
Posted on 31-03-2011 22:23
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Member Location: Ede, The Netherlands Posts: 806 Joined: 24.10.10 |
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 |
Posted on 01-04-2011 08:56
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Member Location: Soest, NL Posts: 18611 Joined: 21.07.04 |
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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but don't see the image in the post.