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Diptera.info » Identification queries » Diptera (adults)
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Stevenia deceptoria sl. << Stevenia (France)
CedricMondy
Hello everyone,

For this one, I managed to go to Stevenia and after discussion, we think it might be S. umbratica or S. kugleri.

Thank you for your help!


www.galerie-insecte.org/galerie/image/dos284/big/P1631654_01.jpg
Cédric Mondy : France : Saint-Maur-des-Fossés : 94100 : 20/06/2021
Altitude : 39 m - Taille : 7.3 mm
Réf. : 284800

www.galerie-insecte.org/galerie/image/dos284/big/P1631666.jpg
Cédric Mondy : France : Saint-Maur-des-Fossés : 94100 : 20/06/2021
Altitude : 39 m - Taille : 7.3 mm
Réf. : 284801

www.galerie-insecte.org/galerie/image/dos284/big/P1631663.jpg
Cédric Mondy : France : Saint-Maur-des-Fossés : 94100 : 20/06/2021
Altitude : 39 m - Taille : 7.3 mm
Réf. : 284808
Edited by CedricMondy on 12-06-2022 22:25
Cédric
 
CedricMondy
Could someone help me for this one?
Cédric
 
Zeegers
Neither. It is in the deceptoria complex.
Species you mentioned are much darker

Theo
 
CedricMondy
Thank you Theo! I will try to check which species of this complex are known to be present in France and see if it seems possible to go further.
Cédric
 
Zeegers
That makes snese, but you will find historic and conflicting opinions.
It has to be sorted out properly.

Theo
 
CedricMondy
I'm afraid I am stuck with this one.

To my knowledge, only acutangula, deceptoria, atramentaria and umbratica are listed to be present in France. I tried using this key to sort things out, but with no luck.

I would discard acutangula because wing cell r4+5 is not with a short petiole.
I first discarded deceptoria because tergites 1+2 to 4 usually were not with a clear yellow posterior margin and more and less red lateraly.
I would also discard atramentaria because the body is not entirely black.

We also noticed that this specimen has crossed post-ocellar setae, do you think this can help in any way?

Otherwise, I will stay at Stevenia sp.

Thank for your help!

PS: there is also two species synonyms of Stevenia listed in France: Paykullia insularis and partenopea
Edited by CedricMondy on 11-07-2021 14:17
Cédric
 
Zeegers
It is deceptoria sl. no doubt but this might be a complex.
And you might have at least two, if valid, in France


Theo
 
Zeegers
So get specimens and get DNA results !,

Theo
 
CedricMondy
Thank you for the confirmation Theo. Unfortunately, I am afraid that DNA analyses are a bit beyond my means Wink But if someone is interested and I get again one of these, I would be happy to send the specimen.

Greetings!
Cédric
 
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