Diptera.info :: Identification queries :: Diptera (adults)
 Oecothea praecox?
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| Jan Willem |
Posted on 12-08-2010 19:16
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 Member Location: Waalwijk, The Netherlands Posts: 2174 Joined: 24.07.04 |
Sorry for the poor quality, but the fly was drifting in alcohol and kept moving around  .I hope Andrzej can tell me which species I'm dealing with. The specimen was collected in a pitfall trap in "De Kaaistoep" (The Netherlands; Tilburg). 8-15.vii.2010. Jan Willem attached the following image:  [151.71Kb] Jan Willem van Zuijlen |
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| rvanderweele |
Posted on 29-08-2010 21:32
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Member Location: Leiden, the Netherlands Posts: 1988 Joined: 01.11.06 |
I have never seen O. praecox. As far as I know this species has only been recorded from caves. Jan Willem, the photo is not that clear. Perhaps Andrzej reacted to you already. Did he say what species it is? If not, do you have objection of sending the specimen to me? I would like to look at it a bit better. ruud van der weele rvanderweele@gmail.com |
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| Jan Willem |
Posted on 29-08-2010 22:10
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Member Location: Waalwijk, The Netherlands Posts: 2174 Joined: 24.07.04 |
Thanks for your response Ruud. The specimen has been sent to Andrzej already. I hope to receive his judgement  soon.
Jan Willem van Zuijlen |
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| rvanderweele |
Posted on 29-08-2010 23:07
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Member Location: Leiden, the Netherlands Posts: 1988 Joined: 01.11.06 |
Please, let me know his opinion. I am very curious.
ruud van der weele rvanderweele@gmail.com |
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| rvanderweele |
Posted on 18-01-2011 22:14
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Member Location: Leiden, the Netherlands Posts: 1988 Joined: 01.11.06 |
Jan Willem, what species was it? I have here now a O.praecox from Oud Leusden. Not a cave or grotto within many kilometers.
ruud van der weele rvanderweele@gmail.com |
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| Andrzej |
Posted on 18-01-2011 22:18
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Member Location: Poland Posts: 2443 Joined: 05.01.06 |
Ruud ! Did you exam this specimen and compare with O. fenesstralis ? Dr. A. J. Woznica, Institute of Biology, Wroclaw University of Environmental & Life Sciences. Poland |
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| rvanderweele |
Posted on 18-01-2011 22:21
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Member Location: Leiden, the Netherlands Posts: 1988 Joined: 01.11.06 |
Which one? On the photo or the specimen, which I have here? To be honest, Andrzej, I have quite some specimens from all over the Netherlands, including from caves in the south of the Netherlands. When i have everything together I want to compare them and see if I can do something with the key of Gorodkov..... Just by chance I came to the message of Jan Willem, and wondered whether you looked at it. ruud van der weele rvanderweele@gmail.com |
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| Andrzej |
Posted on 18-01-2011 22:24
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Member Location: Poland Posts: 2443 Joined: 05.01.06 |
Sorry, but at the moment I can discuss with arguments only 
Dr. A. J. Woznica, Institute of Biology, Wroclaw University of Environmental & Life Sciences. Poland |
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| rvanderweele |
Posted on 18-01-2011 22:27
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Member Location: Leiden, the Netherlands Posts: 1988 Joined: 01.11.06 |
Well, Andrzej, when I am looking at Jan-Willem's photo I think it is praecox. And I think the one I have here as well. Yet, I hope you understand, I am so hesitating since praecox is said to be known from caves and grottos. And Oud Leusden is, I don't know, perhaps more than 100km from any cave or grotto ruud van der weele rvanderweele@gmail.com |
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| Jan Willem |
Posted on 19-01-2011 07:45
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Member Location: Waalwijk, The Netherlands Posts: 2174 Joined: 24.07.04 |
Hi Ruud, Andrzej explained to me that the colouration is rather variable and not a very good character for identification. For the time being it is best to name my specimen as Oecothea cf. fenestralis. Andrzej will have a look at the material and will hopefully be able to tell more later. Jan Willem van Zuijlen |
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| Paul Beuk |
Posted on 18-05-2016 11:08
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 Super Administrator Location: Netherlands Posts: 19403 Joined: 11.05.04 |
Any news on this? The only 'reliable' character I could find for females supposedly is the relative eye size, but a specimen before me also then seems to be praecox but it is not from a cave either...
Paul - - - - Paul Beuk on https://diptera.info |
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| KWQ |
Posted on 13-12-2016 17:38
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Member Location: Turku, Finland Posts: 208 Joined: 10.12.04 |
After quite a while I was also wondering today about this Oecothea fenestralis/praecox-pair. At least in Finland only O. fenestralis has been officially recorded but it seems most local specimens have such a wide gena, that the old key(s)would rather lead to O. praecox. And on top of it all, the old Russian revision of the genus in Entom. Obozr. seems to be missing from local libraries... (Though Gorodkov's key says there are not any distinct genitalia differences in the males of these...). |
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