Thread subject: Diptera.info :: Muscidae?
Posted by Susan R Walter on 16-11-2008 22:59
#1
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.
Posted by Susan R Walter on 16-11-2008 22:59
#2
Another view with the focus better on the antennae.
Posted by Stephane Lebrun on 16-11-2008 23:06
#3
Is this the
Atherigona varia that Nikita has wait for a while ? :)
Posted by Susan R Walter on 16-11-2008 23:08
#4
I wondered if it was an
Atherigona. :)
Posted by Nikita Vikhrev on 16-11-2008 23:23
#5
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
Posted by Susan R Walter on 17-11-2008 21:42
#6
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 ;)
I only have this one specimen, and unfortunately I knocked a leg off it when I was photographing it :@
Nevertheless, I will PM Adrian and see if he will look at it. Thanks for the suggestion Nikita.
Posted by Susan R Walter on 13-12-2008 22:57
#7
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
Posted by Zeegers on 14-12-2008 10:05
#8
Looks like a world-expert answer.
Theo
Posted by Nikita Vikhrev on 14-12-2008 11:28
#9
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
Posted by Susan R Walter on 16-12-2008 14:23
#10
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