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 larva in Fraxinus gall
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| Carnifex |
Posted on 02-03-2022 11:21
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 Member Location: Posts: 1833 Joined: 23.06.15 |
I collected this gall (induced by the mite Aceria fraxinivora) on the ground of a backyard in Vienna, so the larva might have come from the soil. It produced some sticky threads (in the first photo, with a dead bark louse). In the last two photos, a needle-like structure is visible in the head region     
Edited by Carnifex on 02-03-2022 11:21 Cheers, Lorin Font Color All requests are from the urban area of Vienna, if not otherwise stated. My Diptera observations (and other living forms) can be found here, and corrections or comments over there would also be appreciated. |
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| Jan Maca |
Posted on 02-03-2022 20:45
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Member Location: Posts: 1113 Joined: 25.03.10 |
A cecidomyiid, Arthrocnodax fraxinellus, is considered a predator of Aceria fraxinivora. The structure in the head region may be spatula sternalis. I do not know if cecidomyiids can produce sticky threads. |
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| Carnifex |
Posted on 02-03-2022 21:41
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Member Location: Posts: 1833 Joined: 23.06.15 |
Yes, Arthrocnodax, that was my target species - I was collecting these galls to search for them, and actually was successful: But these larvae look quite different (and are smaller), and I do not know whether later stages would transform so much but I am sceptical. I mentioned the structure in the head because I was thinking of spatula sternalis as well - so maybe Arthrocnodax, maybe another Cecidomyiid, maybe s.th. different? Cheers, Lorin Font Color All requests are from the urban area of Vienna, if not otherwise stated. My Diptera observations (and other living forms) can be found here, and corrections or comments over there would also be appreciated. |
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| Jan Maca |
Posted on 03-03-2022 14:16
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Member Location: Posts: 1113 Joined: 25.03.10 |
Well, it is even not excluded that small yellow larvae are cecidomyiids (Arthrocnodax?)and the larger ones might be e. g. ceratopogonids. Interesting case, hopefully you shall obtain imagoes. |
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| Carnifex |
Posted on 10-03-2022 10:19
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Member Location: Posts: 1833 Joined: 23.06.15 |
Stored in absolute EtOH, I fear its development is impeded for the foreseeable future...
Cheers, Lorin Font Color All requests are from the urban area of Vienna, if not otherwise stated. My Diptera observations (and other living forms) can be found here, and corrections or comments over there would also be appreciated. |
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but don't see the image in the post.
