Diptera.info :: Identification queries :: Diptera (adults)
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 Zeuxia sp.?
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| Rui Andrade |
Posted on 24-07-2009 20:18
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 Member Location: Portugal Posts: 3123 Joined: 19.06.07 |
Could this fly be a Zeuxia? location: Barcelos, Portugal date: 09/07/2009   |
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| jorgemotalmeida |
Posted on 24-07-2009 20:20
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 Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
antennae conspicuous, also there are no rows of proclinate bristles, top cell stalked. I would go for Eriothrix.. |
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| Rui Andrade |
Posted on 24-07-2009 20:38
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Member Location: Portugal Posts: 3123 Joined: 19.06.07 |
Thank you Jorge, I couldn't decide between those two genera. |
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| ChrisR |
Posted on 24-07-2009 21:33
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 Super Administrator Location: Reading, England Posts: 7706 Joined: 12.07.04 |
I think it is a Zeuxia (at least not an Eriothrix) - the mouth doesn't look projecting enough; the median vein petiole is quite long; the antennae still look quite short (barely as high as the gena); and the costal spine doesn't seem to be present.
Manager of the UK Species Inventory in the Angela Marmont Centre for UK Biodiversity at the Natural History Museum, London. |
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| Rui Andrade |
Posted on 24-07-2009 21:39
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Member Location: Portugal Posts: 3123 Joined: 19.06.07 |
So I continue without seeing Eriothrix...strange . Thanks Chris |
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| ChrisR |
Posted on 24-07-2009 21:46
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Super Administrator Location: Reading, England Posts: 7706 Joined: 12.07.04 |
Can I swap you some of my common, boring Eriothrix rufomaculata for your wonderful, exotic Zeuxia spp.?! 
Manager of the UK Species Inventory in the Angela Marmont Centre for UK Biodiversity at the Natural History Museum, London. |
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| jorgemotalmeida |
Posted on 24-07-2009 21:47
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Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
ChrisR wrote: I think it is a Zeuxia (at least not an Eriothrix) - the mouth doesn't look projecting enough; the median vein petiole is quite long; the antennae still look quite short (barely as high as the gena); and the costal spine doesn't seem to be present. hmm... I think I should be quiet on this specimen.  |
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| jorgemotalmeida |
Posted on 24-07-2009 22:25
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Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
at least... to me is not Zeuxia. no proclinate brisltes. But I might be wrong... Chris has reason that this fly is not an Eriothrix. |
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| jorgemotalmeida |
Posted on 24-07-2009 22:37
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Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
unless the brisltes are broken  |
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| Rui Andrade |
Posted on 24-07-2009 23:35
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Member Location: Portugal Posts: 3123 Joined: 19.06.07 |
ChrisR wrote: Can I swap you some of my common, boring Eriothrix rufomaculata for your wonderful, exotic Zeuxia spp.?! I only have this Zeuxia, but I'll catch some for you if I see them again. unless the brisltes are broken There really are some broken bristles... |
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| Rui Andrade |
Posted on 27-07-2009 01:16
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Member Location: Portugal Posts: 3123 Joined: 19.06.07 |
Theo, when you have time, don't forget to give your opinion on this fly |
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| Zeegers |
Posted on 27-07-2009 16:56
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Member Location: Soest, NL Posts: 19298 Joined: 21.07.04 |
IT is not Eriothrix, since the eyes are bare (always hairy in Eriothrix). Let's rethink: the calyptra look rather small, don't they ? Are we sure it is not some Rhinophoridae like Phyto ? Theo |
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| Rui Andrade |
Posted on 27-07-2009 20:13
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Member Location: Portugal Posts: 3123 Joined: 19.06.07 |
I think I'm seeing a well developed subscutellum (see the picture below). I have been going through the Central Europe key and I haven't reached any conclusions. I arrive at the 2nd step and there, since the arista is bare we can rule out Zeuxia (right?). I continued, and in step 42 I reach a dead end. In the r4+5 the bristlets do not go up to half the lenght between the base and r-m (suggesting step 44). The thorax has 2 wide black longitudinal stripes, separated by an equally(?) wide, dusted space and the eyes are bare (suggesting step 43).  |
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| Zeegers |
Posted on 27-07-2009 20:53
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Member Location: Soest, NL Posts: 19298 Joined: 21.07.04 |
No. Some Zeuxia have nearly bare arista, though not in Central Europe. However, I don't see a strong costal spine. IS the pic misleading or is it really missing ? Check both wings in case it might be broken. By the way, I agree, no Rhino Theo |
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| Rui Andrade |
Posted on 27-07-2009 21:06
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Member Location: Portugal Posts: 3123 Joined: 19.06.07 |
See here the strong costal spine: Left wing:  Right wing:  |
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| jorgemotalmeida |
Posted on 27-07-2009 21:08
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Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
this is increasing my curiosity on this Zeuxia! |
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| Rui Andrade |
Posted on 27-07-2009 21:37
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Member Location: Portugal Posts: 3123 Joined: 19.06.07 |
Me too |
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| Zeegers |
Posted on 28-07-2009 07:40
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Member Location: Soest, NL Posts: 19298 Joined: 21.07.04 |
The answer is really very simple, and in my mind for some time, but I really need to check some of these things It is the male of Z. sicardi ! Marginals on syntergite 1&2, excavation incomplete, arista with short hairs only, eyes bare, ocellars strong, etc etc. Theo Theo |
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| ChrisR |
Posted on 28-07-2009 10:11
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Super Administrator Location: Reading, England Posts: 7706 Joined: 12.07.04 |
In my ignorance I didn't doubt that it would be a Zeuxia ... just goes to show that sometimes it is statistically better not to know how many thousands of other things it could have been!
Manager of the UK Species Inventory in the Angela Marmont Centre for UK Biodiversity at the Natural History Museum, London. |
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| jorgemotalmeida |
Posted on 28-07-2009 20:14
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Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
Andrade caught the male... I caught females |
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