Diptera.info :: Identification queries :: Diptera (eggs, larvae, pupae)
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 Larva within a Tabanus
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| Carnifex |
Posted on 16-06-2018 22:54
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 Member Location: Vienna, Austria Posts: 1916 Joined: 23.06.15 |
Hi, I am very curious if this case could be solved: upon dissecting the head of a female Tabanus sudeticus, a larva appeared near the esophagus, so it was probably sitting in the thorax. It was about 3mm long. Is there anything known about Tabanids being the host of other flies? Can the larva be narrowed down to a certain family? Cheers, Lorin Carnifex attached the following image:  [290.17Kb] |
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| Carnifex |
Posted on 16-06-2018 22:55
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Member Location: Vienna, Austria Posts: 1916 Joined: 23.06.15 |
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Carnifex attached the following image:  [294.49Kb] |
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| Carnifex |
Posted on 16-06-2018 23:00
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Member Location: Vienna, Austria Posts: 1916 Joined: 23.06.15 |
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Carnifex attached the following image:  [277.89Kb] Edited by Carnifex on 16-06-2018 23:01 |
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| Carnifex |
Posted on 16-06-2018 23:00
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Member Location: Vienna, Austria Posts: 1916 Joined: 23.06.15 |
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Carnifex attached the following image:  [287.13Kb] |
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| atylotus |
Posted on 17-06-2018 09:50
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 Member Location: Amsterdam, NL Posts: 1140 Joined: 29.05.09 |
I'm not sure, but what about the larva of a parasitic wasp? It doesn't remind me of a diptera larvae. But I'm curious too. |
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| Carnifex |
Posted on 17-06-2018 11:23
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Member Location: Vienna, Austria Posts: 1916 Joined: 23.06.15 |
well, a wasp came to my mind in first place - but I was thinking the mouth hooks were characteristic for a dipteran larva. Happy to learn more :-) |
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| johnes81 |
Posted on 18-06-2018 11:26
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 Member Location: Berlin, Germany Posts: 1978 Joined: 15.10.16 |
this is very interesting. I don't recognize the larva but hopefully someone does. very nice discovery, Lorin! John and Nini. Naturalists not experts. |
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| Carnifex |
Posted on 19-06-2018 11:29
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Member Location: Vienna, Austria Posts: 1916 Joined: 23.06.15 |
any idea whom I could approach to find out more? |
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| johnes81 |
Posted on 19-06-2018 14:39
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Member Location: Berlin, Germany Posts: 1978 Joined: 15.10.16 |
if Paul Beuk or Theo Zeegers has no opinion, then i don't know of a Tabanidae specialist. Fauna Europaea lists Dr. Chvala but i don't recommend contacting him. He is old and not very helpful. I've written to him before about Hilara. He seems disinterested in helping. Dr. Bystrowski is very nice and very helpful. You could ask him for an opinion if noone answers. He may even be able to recommend a specialist if you ask him about it. John and Nini. Naturalists not experts. |
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| Ectemnius |
Posted on 19-06-2018 16:17
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Member Location: The Netherlands Posts: 846 Joined: 22.11.11 |
Hi Carnifex, The head looks like a Hymenopterous larvae. But the anterior spiracle looks highly unlikely for a Hyemnopterous larvae. There is no real pharyngeal skeleton visible. So it cannot be a acalyptrate or calyptrate larvae, as far as I know. There are Braconidae (Euphorinae) which parasitize adult holometabolus insects such as Coccinellidae (Coleoptera) and Bombus sp. (Apoidea). In the Diptera family Pipunculidae there are species in the genus Nephrocerus which parasitize other adult Diptera of the family Tipulidae. Also a possibility that it is a very young larvae of Tabanidae which hatched and was somewhere in your sample. For an accurate identification a better picture of both the head and the posterior spiracle would be needed. Hope this helps, Greetings, Ectemnius |
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| Carnifex |
Posted on 20-08-2018 23:36
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Member Location: Vienna, Austria Posts: 1916 Joined: 23.06.15 |
Hi there, I finally got access to a better optic device. Unfortunately I did not image the posterior spiracle in detail, but maybe from the mouthparts some rough classification is already possible? Carnifex attached the following image:  [108.8Kb] Edited by Carnifex on 20-08-2018 23:37 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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| Carnifex |
Posted on 20-08-2018 23:39
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Member Location: Vienna, Austria Posts: 1916 Joined: 23.06.15 |
and here two views of the mouth parts
Carnifex attached the following image:  [275.37Kb] Edited by Carnifex on 20-08-2018 23:40 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 21-08-2018 11:34
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Member Location: Posts: 1204 Joined: 25.03.10 |
K.G.V.Smith (1989, An introduction to the immature..., p.20) mentioned the paper of Thompson 1978 recording Macronychia and some Tachinidae from tabanids in the US. Maybe you are the first in Europe who noticed these parasites? |
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| Tony Irwin |
Posted on 21-08-2018 15:33
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 Member Location: Norwich, England Posts: 7232 Joined: 19.11.04 |
To me, the mouth hooks look more like those found in Oestridae (bot fly) larvae. So I'm wondering whether this is an accidentally ingested larva that the Tabanus has picked up off its host. Perhaps someone with experience of freshly-hatched oestrid larvae could offer an opinion?
Tony ---------- Tony Irwin |
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| Carnifex |
Posted on 22-08-2018 09:56
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Member Location: Vienna, Austria Posts: 1916 Joined: 23.06.15 |
That sounds all very interesting, I will try to make better images when I get a slot at the microscope again. Otherwise, I am also willing to send the sample to someone who wants to take a look at it Cheers! 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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