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Muscidae?
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Susan R Walter |
Posted on 16-11-2008 22:59
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![]() Member Location: Touraine du Sud, central France Posts: 1802 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 |
Susan R Walter |
Posted on 16-11-2008 22:59
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![]() Member Location: Touraine du Sud, central France Posts: 1802 Joined: 14.01.06 |
Another view with the focus better on the antennae.
Susan R Walter attached the following image: ![]() [55.57Kb] Susan |
Stephane Lebrun |
Posted on 16-11-2008 23:06
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![]() Member Location: Le Havre, France Posts: 8248 Joined: 03.03.07 |
Is this the Atherigona varia that Nikita has wait for a while ? ![]() Stephane. |
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Susan R Walter |
Posted on 16-11-2008 23:08
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![]() Member Location: Touraine du Sud, central France Posts: 1802 Joined: 14.01.06 |
I wondered if it was an Atherigona. ![]() Susan |
Nikita Vikhrev |
Posted on 16-11-2008 23:23
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![]() Member Location: Moscow, Russia Posts: 9459 Joined: 24.05.05 |
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 |
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Susan R Walter |
Posted on 17-11-2008 21:42
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![]() Member Location: Touraine du Sud, central France Posts: 1802 Joined: 14.01.06 |
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. Susan |
Susan R Walter |
Posted on 13-12-2008 22:57
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![]() Member Location: Touraine du Sud, central France Posts: 1802 Joined: 14.01.06 |
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 |
Zeegers |
Posted on 14-12-2008 10:05
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Member Location: Soest, NL Posts: 19026 Joined: 21.07.04 |
Looks like a world-expert answer. Theo |
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Nikita Vikhrev |
Posted on 14-12-2008 11:28
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![]() Member Location: Moscow, Russia Posts: 9459 Joined: 24.05.05 |
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: ![]() [98.06Kb] Nikita Vikhrev - Zool Museum of Moscow University |
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Susan R Walter |
Posted on 16-12-2008 14:23
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![]() Member Location: Touraine du Sud, central France Posts: 1802 Joined: 14.01.06 |
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 |
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