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Diptera.info » Identification queries » Other insects, spiders, etc.
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small braconid wasp (continued)
Sundew
Hello,
Though ichneumonid wasps are very difficult and my photos are not the best ones, I would like to post this small female that is ovipositing in the floral heads of Tanacetum vulgare (Asteraceae). Can you possibly tell from the plant preference which genus it belongs to?
Seen on the Baltic Island of Usedom in August.
Many thanks, Sundew
Edited by Sundew on 20-01-2008 23:27
 
Christian Schmid-Egger
It would be impossible to say anything from the plant preference, because the wasp is attacking any insect larva inside the plant. In Asteraceae, often you will find Thevritidae (Diptera) or some Microlepidoptera.

Regards, Christian
 
www.hymis.eu, www.bembix.de
cthirion
BraconidaeWink!
cthirion
 
http://www.cthirion.com/
Xespok
The diptera family you mean, is Tephritidae.
Gabor Keresztes

Japan Wildlife Gallery
Carpathian Basin Wildlife Gallery
 
Teglagyar u. 30.
proctoss
Yes, Braconidae
 
http://www.zin.ru/labs/insects/hymenopt/personalia/Kolyada/index.html
Sundew
Another considerable gain of knowledge. Small ichneumonids are, in fact, braconids, and they parasitize only animals, not plants. And I thought I had possibly detected the source of the funny Tanacetum galls! (The pic, however, was taken at a very distant locality from the pics above, in Brandenburg.) I have often seen larvae in the bottom of the floral heads of thistles etc., but they never caused conspicuous deformations. In the case shown, however, the primordia of single flowers grew into bizarre, sterile galls. Is anybody among us who knows the originator, braconids being innocent?
Cordially, Sundew
Edited by Sundew on 20-01-2008 23:26
 
cosmln
about galls, i will say that belongs to an cecidomiid Rhopalomyia tanaceticola (Karsch)

cosmln
 
http://mybiosis.org/nature/portal.php?pagename=firstpage
Sundew
CosmIn, you are a true genius! I googled Rhopalomyia tanaceticola and found several gall pics absolutely identical to mine. Unfortunately, there is no pic of the gall midge itself. I saw you put another gall photo in the gallery, so would it be of use to add the Rhopalomyia tanaceticola galls, too? They seem to be very typical.
Anyhow, many thanks for the quick ID!
Sundew
 
cosmln
Sundew wrote:
CosmIn, you are a true genius! I googled Rhopalomyia tanaceticola and found several gall pics absolutely identical to mine. Unfortunately, there is no pic of the gall midge itself. I saw you put another gall photo in the gallery, so would it be of use to add the Rhopalomyia tanaceticola galls, too? They seem to be very typical.
Anyhow, many thanks for the quick ID!
Sundew


hihihi,
i'm not a genius. just using the books i have.
on this address (at page 16) you will find some more exact galls.
http://www.mda.state.mn.us/news/publications/pestsplants/badplants/tansybiocontrol2006report.pdf
about adding this to the gallery i will say YES, about photo of midge... collect them and wait Grin
i will do that this year... i'm just curios Grin
i'm just interested in them... not a specialist at all... and when i have ocasion i make some photo hoping that i can put a name there.

welcome and happy that i can help with something,
cosmln
 
http://mybiosis.org/nature/portal.php?pagename=firstpage
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