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View Thread :: Identification queries :: Diptera (adults)
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Ctenophora : flaveolata, or festiva ?
#1 Print Post
Posted on 06-05-2007 00:56
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Location: Fragnes (Burgundy, France)
Posts: 183
Joined: 15.06.04


There is some concern about some female Ctenophora sp, on the french forum "Le Monde des Insectes" (have a glance here if you understand french ! Wink). Here is the first picture :

And here is a second specimen, thought to be from the same species, where one may have a better view of wings :

And here is wing detail : And here is the question Grin :
The first step in "Faune de France" key deals with the presence of a marking covering pterostigma, either covering part of discoidal cell, or extending to the border of the wing, that leads further to ornata, festiva or elegans if present, or pilosa, pectinicornis, nigricoxa, flaveolata, or guttata if absent.

So, the problem with this specimen is to know whether the black marking spreading from pterostigma to the border of this wing is significative (which would lead to C. festiva), or not (leading to C. flaveolata) ?

Thanks ! Wink
Edited by Arthropa on 06-05-2007 00:57
Benoit MARTHA Smile
#2 Print Post
Posted on 06-05-2007 13:03

Location: Soest, NL
Posts: 18632
Joined: 21.07.04

Hi Arthropa,

Ct. flaveolata is the only Ctenophora with complete yellow bands, so flaveolata it is !
Please note the excellent recent key in English by Oosterbroek & Bygebjerg in Entomologische Berichten 66(5): 138-149 (2006)
#3 Print Post
Posted on 06-05-2007 20:10
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Location: Fragnes (Burgundy, France)
Posts: 183
Joined: 15.06.04

Thanks Theo ! Wink
Benoit MARTHA Smile
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