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Diptera.info :: Identification queries :: Diptera (adults)
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Hydrotaea for ID Belgium 2024-05-22
Tetrao
#1 Print Post
Posted on 22-05-2024 20:39
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Location: Belgium, Wanze
Posts: 320
Joined: 14.06.18

Hi everyone !!!

I pictured this Hydrotaea in my garden on 2024-05-22.
I could measure it on picture : 7,0mm

Is it possible to ID it up to the species ???

observations.be/media/photo/91343741.jpg

observations.be/media/photo/91343742.jpg

observations.be/media/photo/91343743.jpg

observations.be/media/photo/91343744.jpg

observations.be/media/photo/91343745.jpg

observations.be/media/photo/91372842.jpg

Thank you for reading and / or commenting or ID !!!

Have a good day,
Didier
Edited by Tetrao on 23-05-2024 12:19
 
John Carr
#2 Print Post
Posted on 22-05-2024 22:08
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Hydrotaea?
 
http://www.flickr.com/photos/31715949@N00
Tetrao
#3 Print Post
Posted on 23-05-2024 07:35
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Location: Belgium, Wanze
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Thank you very much, John !
I’ll look in this direction …
Have a good day today !!!
Didier
 
Iain MacGowan
#4 Print Post
Posted on 23-05-2024 10:32
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The pro- thoracic suture ( the obvious lateral crease on the anterior third of the thorax) is clearly evident in photo 1. So its definitely not Lonchaeidae. I would ah agree with Hydrotea
Iain MacGowan
 
Tetrao
#5 Print Post
Posted on 23-05-2024 12:16
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Location: Belgium, Wanze
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Thank you Iain, I definitively agree with Hydrotea too !!!
I’m now searching for the ID to species, I’ve tried the Fonseca key, but I arrived at H. nidicola Which is a British and German species but we haven’t it in Belgium nor in The Netherlands nor in France …

Have a good day today,
Didier
 
John Carr
#6 Print Post
Posted on 23-05-2024 14:42
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There are a few species with a long, shining frontal triangle. Hydrotaea aenescens strikes me as the most likely.
 
http://www.flickr.com/photos/31715949@N00
Tetrao
#7 Print Post
Posted on 23-05-2024 18:38
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Location: Belgium, Wanze
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Thank you very much, John !!!
I’ll have a look for this species…
I’ve already seen that some specimen where pictured and / or collected in The Netherlands !!!

Have a good day,
Didier
 
Tetrao
#8 Print Post
Posted on 24-05-2024 13:46
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I'm back with new food ... I read a paper saying that there has been a problem !
1. Fonseca and Séguy didn't call Hydrotaea aenescens as it is now, they both put this species in the Ophyra genus . So many specimen in Belgium before 1970 where not named Hydrotaea aenescens but Ophyra capensis. Both species are really "the same" except for details (Fonseca) Ophyra capensis :
Squamae white with whitish border and fringe. Presutural dorsocentrals and acrostichals hardly distinguishable from thoracic hairs. 4,5-5,5 mm
and for females : " frontal triangle extending to lunule. "

There were 2 Ophyra in Fonseca key, the other one was Ophyra leucostoma, with description : "Lower squama strongly darkened, with dark brown border and fringe.
Presutural dorsocentrals well, acrostichals moderately, developed. Females : Frontal triangle not reaching lunule. 5,5-7,25 mm.
This one is now named Hydrotaea ignava (Harris 1780) !

As I see from the comments here we could read from pictures about the front ...
Here are some pictures with different angles of this zone of the head...
Can I hope some comments about and perhaps an ID ?

observations.be/media/photo/91529371.jpg

observations.be/media/photo/91529372.jpg

observations.be/media/photo/91529373.jpg

observations.be/media/photo/91529374.jpg

observations.be/media/photo/91529375.jpg

observations.be/media/photo/91529643.jpg

observations.be/media/photo/91529644.jpg

observations.be/media/photo/91529645.jpg

observations.be/media/photo/91529646.jpg

Do I have to add that all those species are now recognised and present in Belgium :
Hydrotaea aenescens, Hydrotaea capensis and Hydrotaea ignava...

Thanks for reading,

Have a good day,
Didier.
Edited by Tetrao on 25-05-2024 08:06
 
Tetrao
#9 Print Post
Posted on 24-05-2024 14:15
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Location: Belgium, Wanze
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https://www.googl...W3aYbUdnEx

Page 230
Edited by Tetrao on 24-05-2024 14:16
 
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