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Diptera.info :: Family forums :: Syrphidae
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Black Paragus.
Pietro
#1 Print Post
Posted on 10-11-2008 15:35
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Location: Alghero Sardinia Italy
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Uri, Sardinia 14/06/2008 dimensions: around 5 mm.
Peragus female, ID possible?
Pietro attached the following image:


[133.03Kb]
Ciao
Pietro
 
Pietro
#2 Print Post
Posted on 10-11-2008 15:36
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Location: Alghero Sardinia Italy
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Photo 2
Pietro attached the following image:


[133.14Kb]
 
Pietro
#3 Print Post
Posted on 10-11-2008 15:36
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Location: Alghero Sardinia Italy
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Photo 3
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[133.62Kb]
 
Andre
#4 Print Post
Posted on 10-11-2008 20:46
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Location: Tilburg, the Netherlands
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Interesting (but difficult)...
There are not so many Paragus (s.str.) species where female have a lacking facial stripe, like in this case. Still, ID based on a picture is risky!
Paragus can be very variable, in males as well as females.
Possibly this is Paragus quadrifasciatus female. But I stay in doubt for some reasons. So that's as far as my guess goes...

Maybe.. if you have a sharp and close-up picture from the side of the tip of her abdomen, a certain ID can be made.
Better is, to collect them (and don't forget to collect the males with them! Smile )
Edited by Andre on 10-11-2008 20:47
 
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pierred
#5 Print Post
Posted on 11-11-2008 06:43
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Hello,

Andre wrote:
Possibly this is Paragus quadrifasciatus female. But I stay in doubt for some reasons.


In Van Veen's key, it keys out rather directly to P. quadrifasciatus. What are your reasons to doubt?
Pierre Duhem
 
Pietro
#6 Print Post
Posted on 11-11-2008 18:25
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Location: Alghero Sardinia Italy
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Thanks André, hello Pierre
sorry, I do not have other pictures and I don’ t have captured the insect. I think your diagnosis is most probable, I have caught a male very similar in an other occasion identified as Paragus quadrifasciatus (on specimen) by Daniele Sommaggio.

Ciao
Pietro
 
Andre
#7 Print Post
Posted on 11-11-2008 23:23
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pierred wrote:
Hello,

Andre wrote:
Possibly this is Paragus quadrifasciatus female. But I stay in doubt for some reasons.


In Van Veen's key, it keys out rather directly to P. quadrifasciatus. What are your reasons to doubt?


Because of the variability, because it's a female, because I don't see the tip of the abdomen, because there are more species with reduced facial stripe, because I don't know if Sardinia might have endemic species...
But, it's a very common species Smile
 
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pierred
#8 Print Post
Posted on 12-11-2008 07:36
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André,

Thanks for taking the time to write it down.
Pierre Duhem
 
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