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Diptera.info :: Identification queries :: Diptera (adults)
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Drosophila repleta group (D. hydei?)
Gnats2meetu
#1 Print Post
Posted on 24-07-2019 16:04
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Hey Dipterists! Can anyone confirm Drosophila hydei?

best wishes,

Rob
Gnats2meetu attached the following image:


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Bobby D
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Jan Maca
#2 Print Post
Posted on 24-07-2019 17:55
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Not easy to decide. Dark rings at the bases of tibiae show D. buzzatii. This species should have pale "windows" on the ventrolateral parts of abdominal tergites, which is not seen in this pcture. Despite that I think this is D. buzzatii, only the second record from Britain. This species develops mainly in cacti.
Capturing of a male would be crucial to confirm or not this determination.
 
Gnats2meetu
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Posted on 25-07-2019 09:46
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Hi @Jan Maca Thanks so much for the help. I'm very gracious. D. buzzatii was a possibility and I'm wondering how I went past it in the keys I was using. I will be sure to check the tergites now. Is it the darkness of the photo do you think or the orientation that thwarts this character? I only have two females but might get them sequenced. Pfft
Edited by Gnats2meetu on 25-07-2019 09:46
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Jan Maca
#4 Print Post
Posted on 25-07-2019 12:47
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I have seen ony a few D. buzzatii, so that I cannot exclude that dark individuals lack the windows or almost so. The orientation of photos seems me OK, but the lower part of abdomen is shadowed, which might obscure this character. Please get at least one specimen sequenced and then tell me (janxmaca@seznam.cz) the result.
 
Gnats2meetu
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Posted on 25-07-2019 15:12
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@Jan Maca I have looked at the specimens again and I wouldn't say there is any obvious windowing. The character that excluded buzzatii was the
lack of a darkened part of the first costal section.
Bobby D
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Jan Maca
#6 Print Post
Posted on 25-07-2019 17:36
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Yes, but these darkened bases of tibiae are puzzling...,Maybe the sequencing could tell us more.
Jan
Edited by Jan Maca on 25-07-2019 17:37
 
Gnats2meetu
#7 Print Post
Posted on 27-09-2019 15:32
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Sequencing results are back and it has come out as Drosophila hydei Sturtevant, 1921.
Interesting!
Bobby D
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Paul Beuk
#8 Print Post
Posted on 27-09-2019 16:00
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Many of the very dark specimens (older specomens) of hydei can have bases of tibiae darkened, see, e.g., the large version of the image top right on https://en.wikipe...hila_hydei
Edited by Paul Beuk on 27-09-2019 16:02
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Jan Maca
#9 Print Post
Posted on 27-09-2019 18:04
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In some cases, just an opinion can be achieved on the base of photographs only.
Molecular analysis is more reliable, and I thank you, Bob, for arranging it.
Jan
 
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