Thread subject: Diptera.info :: Tachinidae> Dexia rustica (f)
Posted by Jan Wind on 30-03-2011 21:37
#1
This one was seen 19 sept 2010 on Solidago flower field in forest area Planken Wambuis Netherlands.
Edited by Jan Wind on 05-04-2011 17:42
Posted by Jan Wind on 30-03-2011 21:41
#2
the r4+5 is open . there are 3 dc
Posted by Jan Wind on 30-03-2011 21:42
#3
also a picture from this side
Posted by ChrisR on 30-03-2011 22:07
#4
Looks like
Dinera grisescens to me :)
Posted by Jan Wind on 30-03-2011 22:38
#5
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.
Posted by ChrisR on 30-03-2011 23:03
#6
Well, it;s either that or
Dexiosoma caninum :)
Posted by neprisikiski on 31-03-2011 14:54
#7
I think, it is
Dexia rustica, because in
Dexiosoma hind margins of tergites are undusted.
Posted by Zeegers on 31-03-2011 17:05
#8
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
Posted by neprisikiski on 31-03-2011 18:27
#9
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....
Posted by Zeegers on 31-03-2011 21:26
#10
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
Posted by Jan Wind on 31-03-2011 22:23
#11
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
Posted by Zeegers on 01-04-2011 08:56
#12
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