Diptera.info :: Family forums :: Syrphidae
 Cheilosia soror
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| Gerrit Oehm |
Posted on 30-08-2016 10:31
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Member Location: Germany Posts: 180 Joined: 26.11.11 |
Hello, I know cheilosia are tricky and a lot of species, but I thought the antennae and certain coloured leags could make this one easier. I thought this one looks like C. bergenstammi, could someone confirm od falsify? I can put in more pictures, if needed. (Found in August in Germany, North Rhine-Westphalia) Gerrit Oehm attached the following image:  [20.47Kb] Edited by Gerrit Oehm on 31-08-2016 10:13 |
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| Gerrit Oehm |
Posted on 30-08-2016 10:31
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Member Location: Germany Posts: 180 Joined: 26.11.11 |
and the head
Gerrit Oehm attached the following image:  [21.98Kb] |
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| RobertZ |
Posted on 30-08-2016 18:23
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Member Location: Posts: 23 Joined: 17.01.16 |
Not with such a flat face. Check C. velutina |
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| Gerrit Oehm |
Posted on 31-08-2016 07:35
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Member Location: Germany Posts: 180 Joined: 26.11.11 |
I checked more closely - I took a wrong turn in Hoverfly key (Bothe) there (I went one step in the key to far), but got it right now. but found a key for the proxima-group in the web - It looks like it is a Cheilosia cf. velutina - even found the area of black bristly-hairs on tergit 3! Thank you for the help Edited by Gerrit Oehm on 31-08-2016 07:58 |
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| Menno Reemer |
Posted on 31-08-2016 08:16
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Member Location: Posts: 343 Joined: 10.06.04 |
Very few characters are visible on the images, but I'm a little suspicious. Are the eyes hairy? They don't seem to be. If they are not, then check C. soror. |
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| Gerrit Oehm |
Posted on 31-08-2016 08:31
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Member Location: Germany Posts: 180 Joined: 26.11.11 |
The eyes are not hairy, I guess I was overhasty. I will try the key again from the beginning, and check especially for C. soror. |
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| Gerrit Oehm |
Posted on 31-08-2016 08:55
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Member Location: Germany Posts: 180 Joined: 26.11.11 |
Thank you for your help, Robert and Menno. The first few Tarsi should be yellow for C. soror, shouldn't they? When I follow the key from Bothe (which does not include all Cheilosia, I know, but which key does?), I end up at " Cheilosia cynocephala, mutabilis, proxima, praecox, vernalis, velutina". Some of those should be exkluded, because the fly has bare eyes, and on the other hand I am still not sure if those are all species, I should put in consideration. Edited by Gerrit Oehm on 31-08-2016 08:55 |
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| Menno Reemer |
Posted on 31-08-2016 09:25
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Member Location: Posts: 343 Joined: 10.06.04 |
If the fly has bare eyes, then all species of the proxima-group (including C. velutina) can be excluded, and so can all other species you mention. With bare eyes, partly yellow legs and such brightly orange antennae, C. soror is the only likely candidate in Germany. |
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| Gerrit Oehm |
Posted on 31-08-2016 09:45
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Member Location: Germany Posts: 180 Joined: 26.11.11 |
Thank you very much. I thought before, that C. soror was supposed to have a fully orange/yellow Tibia. I would not have been able to reach the spieces, but I have found a mistake in the key I was using - one option was not linked correctly. |
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