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Diptera.info :: Identification queries :: Diptera (adults)
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Ephydridae
GAREL Jean-Michel
#1 Print Post
Posted on 16-02-2024 12:50
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Hello,
This Ephydridae of 2 mm was observed on february 2 in the north of Yonne department (Burgondy, France).
According to this post:https://diptera.info/photogallery.php?photo_id=5007, Limnellia quadrata should be possible. But, what are the criterions to distinguish between Limnellia quadrata and Ilythea spilota ? All my thanks for a reply.
www.galerie-insecte.org/galerie/image/dos336/big/L.%20quadrata%20020224.jpg
Jean-Michel GAREL : France : Brannay : 89150 : 02/02/2024
Altitude : NR - Taille : 2 environ
Réf. : 336335

www.galerie-insecte.org/galerie/image/dos336/big/Limnellia%20quadrata2%20020224.jpg
Jean-Michel GAREL : France : Brannay : 89150 : 02/02/2024
Altitude : NR - Taille : 2 environ
Réf. : 336336
 
Nikita Vikhrev
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Posted on 16-02-2024 13:05
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Limnellia
Nikita Vikhrev - Zool Museum of Moscow University
 
GAREL Jean-Michel
#3 Print Post
Posted on 16-02-2024 13:15
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Thanks Nikita.
 
GAREL Jean-Michel
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Posted on 16-02-2024 14:52
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Dear Nikita.
According to this paper: https://diptera.info/forum/viewthread.php?thread_id=112514&pid=465221#post_465221, L. stenhammari is perhaps the best species.
 
Tony Irwin
#5 Print Post
Posted on 16-02-2024 15:42
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This is Limnellia quadrata - note that it has just two dark spots hanging off vein R4&5. Separating Limnellia from Ilythea is straightforward. Limnellia has a moustache of bristles fringing the mouthedge, whereas Ilythea has a face that is bare centrally.
Tony
----------
Tony Irwin
 
GAREL Jean-Michel
#6 Print Post
Posted on 16-02-2024 19:37
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Thanks Tony for your response about Limnellia versus Ilythea.
Regards, Jean-Michel Garel.
 
Cranefly
#7 Print Post
Posted on 20-02-2024 10:46
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Location: Shachovskaya
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Some more comments about Limnellia.
The name of species depends on 2 or 3 spots on vein, which are pointed with lines on figures (Krivosheina, 2012).

On your photos I see 2 spots only, so it is to be quadrata. Tarsal segments of this species partly yellowish. Halters black.

But the wings are one above another.

The third spot may be possible under another angle of vision.

If you see 3 dark spots - the species may be stenhammari or fallax.

In this case you can check the coloration of halter

In Limnellia stenhammari halter is black and in L. fallax halter is yellow.

In Limnellia stenhammari legs completely black, including tarsi. In Limnellia fallax basal tarsomer yellow.
Edited by Cranefly on 20-02-2024 10:47
 
GAREL Jean-Michel
#8 Print Post
Posted on 21-02-2024 06:50
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A lot of thanks Cranefly for your comments.
Best wishes.
Jean-Michel Garel.
 
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