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Diptera.info :: Identification queries :: Diptera (adults)
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Helina species = Helina confinis
johnes81
#21 Print Post
Posted on 13-09-2017 00:10
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Location: Berlin, Germany
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spermathecae
johnes81 attached the following image:


[77.32Kb]
John and Nini
 
Stephane Lebrun
#22 Print Post
Posted on 13-09-2017 20:39
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If the radial node is setulose, it should be H. confinis.
Stephane.
 
johnes81
#23 Print Post
Posted on 13-09-2017 21:06
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H. confinis is definitely listed for Berlin.

One thing: I have no idea what is the radial node?
I'm assuming you mean the base of r5 (I get this expression from Tschorsnig)
I've shown the base of r5 plus the "node at the junction of humeral crossvein and vein Sc" (I get this expression from Rognes). I have never seen "radial node" in a drawing of a wing.

Hopefully, one of these areas in my photo is the radial node (I guess the R vein means radial, thus the node is what I call 'the base of r5".) Sorry for my lack of understanding here.

I will post a photo of the areas with setae. be right back ...
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johnes81
#24 Print Post
Posted on 13-09-2017 21:10
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both areas with arrows have hairs
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Edited by johnes81 on 13-09-2017 21:11
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Stephane Lebrun
#25 Print Post
Posted on 14-09-2017 00:17
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Yes, radial node is the base of R4+5.
Stephane.
 
johnes81
#26 Print Post
Posted on 14-09-2017 01:02
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Thank You Sir Stephane. I appreciate your Time and Expertise very much.
I will refer to the base as radial node from now on. Thank You.

Meantime, I forgot to add a photo that would've helped you more. I am sorry. I get tired at the end of a day. I noticed that the hypopleuron/meron is a critical feature for determination. The meron of this species is bare. I've added the photo to this message for clarity.

Thank You for the determination. I wish for you a Pleasant Day.
johnes81 attached the following image:


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John and Nini
 
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