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Diptera.info :: Identification queries :: Diptera (adults)
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Muscidae?
Susan R Walter
#1 Print Post
Posted on 16-11-2008 22:59
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Location: Touraine du Sud, central France
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Joined: 14.01.06

Don't really know what this is, but it has very distinctive antennae, so I am hoping someone will recognise it.

Female, 4mm, lowland central France (la Brenne), swept from the grass in a haymeadow, 8 July 2008.
Susan R Walter attached the following image:


[52.5Kb]
Susan
 
http://loirenature.blogspot.com/
Susan R Walter
#2 Print Post
Posted on 16-11-2008 22:59
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Location: Touraine du Sud, central France
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Another view with the focus better on the antennae.
Susan R Walter attached the following image:


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Susan
 
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Stephane Lebrun
#3 Print Post
Posted on 16-11-2008 23:06
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Location: Le Havre, France
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Is this the Atherigona varia that Nikita has wait for a while ? Smile
Stephane.
 
Susan R Walter
#4 Print Post
Posted on 16-11-2008 23:08
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I wondered if it was an Atherigona. Smile
Susan
 
http://loirenature.blogspot.com/
Nikita Vikhrev
#5 Print Post
Posted on 16-11-2008 23:23
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Atherigona it is.
varia or not?
Susan, you are GB citizen, why don't send this female to Adrian Pont - he is working under Atherigona right now.
Nikita
Nikita Vikhrev - Zool Museum of Moscow University
 
Susan R Walter
#6 Print Post
Posted on 17-11-2008 21:42
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I have to be a citizen to send Adrian material ?!! Good thing I had that interview with the Home Office a couple of years ago then Wink

I only have this one specimen, and unfortunately I knocked a leg off it when I was photographing it Angry

Nevertheless, I will PM Adrian and see if he will look at it. Thanks for the suggestion Nikita.
Susan
 
http://loirenature.blogspot.com/
Susan R Walter
#7 Print Post
Posted on 13-12-2008 22:57
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Location: Touraine du Sud, central France
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Adrian put me on to John Deeming at the Museum of Wales, who agreed to look at this specimen. Here is the reply I got today from him.

Dear Susan, Thank you for sending the specimen and such full data. It is rather damaged, lacking most of its legs, which makes identification less certain. Nevertheless, it is a most unusual specimen. In the colour of the interfrontalia and the structure of the female eighth tergite it fits Atherigona (A.) varia (Meigen), which species one would expect to find in Central France. However, it has almost the entire dorsum of the abdomen not merely to some degree infuscate, which one might expect, but deep black. Such a coloration of the dorsum of the abdomen I have only seen in females of the east African species A. hargreavesi van Emden and some oriental species of the subgenus Acritochaeta. A. varia is in colour a very variable species, but that variation is usually expressed in the fore femur (missing on both sides in your specimen), rather than the abdomen. A. laevigata (Loew) is a common african species. Lowland specimens are predominantly yellow in colour, but those from the highlands of east Africa are predominantly dark. I suppose that in the case of your specimen a climatic melanism could be the cause of its coloration. I would certainly like to retain the specimen. Thank you very much. I hope that at some time you will be able to collect material of both sexes from the same locality in which you found it. In the meantime I think it best that you consider it to be a most unusual specimen of A. varia. Yours, John

Susan
 
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Zeegers
#8 Print Post
Posted on 14-12-2008 10:05
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Location: Soest, NL
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Looks like a world-expert answer.

Theo
 
Nikita Vikhrev
#9 Print Post
Posted on 14-12-2008 11:28
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Location: Moscow, Russia
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So, Susan, it is difficult group even with John Deeming at background!
I'm doing my best to collect in Thailand maximum for Adrian Pont, but even incase of males and with all 6 legs available I can't ID most of species.
This is a pleasure exclusion
Atherigona (Acritochaeta) seticauda Malloch
Nikita Vikhrev attached the following image:


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Nikita Vikhrev - Zool Museum of Moscow University
 
Susan R Walter
#10 Print Post
Posted on 16-12-2008 14:23
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Location: Touraine du Sud, central France
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Can someone clarify for me what the status of A. varia in France is? Is it uncommon or under-recorded? How widespread is it? What is the difference between it and the African crop pest A. soccata, sometimes listed as A varia var soccata
Susan
 
http://loirenature.blogspot.com/
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