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Diptera.info :: Identification queries :: Diptera (adults)
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Weird fly from Amazon Rain Forest (Brazil)
mmmsoares
#1 Print Post
Posted on 14-11-2017 23:49
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Could anyone help with the identification of this specimen?

Brazil, Amazonas, Manaus

i.imgur.com/Gq7jApv.jpg
i.imgur.com/jTClIGj.jpg
i.imgur.com/tJDYPvD.jpg
 
John Carr
#2 Print Post
Posted on 15-11-2017 00:18
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Location: Massachusetts, USA
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The wing belongs to Stegana.
 
http://www.flickr.com/photos/31715949@N00
Dmitry Gavryushin
#3 Print Post
Posted on 15-11-2017 19:20
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Location: Moscow region, Russia
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I believe it's solved. Starting with the key to tribes and genera in Okada, 1989 (Zoological Science 6: 391-399), I've arrived to a rather peculiar genus Pyrgometopa Kertesz, 1901 (meaning 'turret-like frons' ), type species P. penicillata, described from a single female. Here's the original discription (Kertesz, 1901 - Neue und bekannte Dipteren in der Sammlung des ungarischen National-Museums- Természetrajzi Füzetek 1901, 420) which fits quite well:

Glänzend schwarz. Stirn vorne bräunlichgelb, der thurmförmige Höcker, die übrigen Theile der Stirn dunkelbraun; Hinterkopf glänzend schwarz. Den Büschel auf dem Höcker bilden schwarze Haare. Untergesicht schwarzbraun, etwas graulich bestäubt; die Backen bräunlichgelb, weiss schimmernd; Rüssel und Taster bräunlichgelb, letztere an der Spitze fast schwarz. Fühler so gefärbt als der vordere Theil der Stirn, kaum bestäubt; das dritte Glied an der Spitzenhälfte schwarzbraun; Borste gelb. Thorax glänzend schwarz, nur die Humeralgegend ist in kleiner Ausdehnung beingelb. Ausgenommen das Schildchen, ist der ganze Körper kurz, schwarz behaart, die Haare erscheinen aber in gewisser Richtung braun. Die Beine sind dunkelbraun, ausgenommen die Schenkel- und Schienenspitzen, sowie die Tarsen an den Vorderbeinen, die Schienen und Tarsen der Hinterbeine, die bräunlichgelb sind. Die Flügel sind in grosser Ausdehnung dunkel-braun gefärbt. Schwinger lichtbraun. Länge: 3.5 mm.
Ein ♀ aus Peru (Callanga).


Definitely a nice find!
Edited by Dmitry Gavryushin on 15-11-2017 19:21
While others can't climb, using infinite pains,
I, gravity turning to jest,
Ascend, with all ease, perpendicular planes,
Rough or smooth, just as pleases me best.
 
Nikita Vikhrev
#4 Print Post
Posted on 15-11-2017 20:39
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Location: Moscow, Russia
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All these images of this badly known and nice fly should be in our Gallery!
Nikita Vikhrev - Zool Museum of Moscow University
 
mmmsoares
#5 Print Post
Posted on 16-11-2017 18:09
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Thanks for the help, I'm going to look for more specimens, this genus does not yet have a record for Brazil.
 
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Date and time
25 November 2017 08:25
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20.11.17 15:09
Pls sign to help save Botanophila fonsecai https://home.38deg
rees.org.uk/?s=Fon
seca. Thx

17.11.17 14:22
Thanks Paul, interesting point

16.11.17 13:44
'Holding' might not be the perfect description. Apparently the armature makes contact with sensitive places on the female, coaxing her to agree to mate.

16.11.17 13:43
Is was not quite sure whether the word would apply correctly, but, yes, that is okay.

15.11.17 11:29
How about armature, would that fit? based on http://onlinelibra
ry.wiley.com/doi/1
0.1111/j.1365-3113
.2008.00422.x/pdf
it would seem that these spines etc are used to hold the female!

14.11.17 09:22
All spines, ridges, lobes, etc. on the femur.

14.11.17 08:36
I think bewaffnung is like weapons (on femur 1).

13.11.17 13:10
Hello can any1 tell me how to translate bewaffnung des femur 1? Thx

26.10.17 13:37
Yes it looks like a typo error e instead of a Thanks you

26.10.17 09:54

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