Diptera.info :: Identification queries :: Diptera (adults)
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 Leopoldius brevirostris?
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| fatsemann |
Posted on 24-07-2019 09:28
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Member Location: Posts: 169 Joined: 09.10.17 |
Hello, Is this fly a Leopoldius brevirostris? Date of picture: 2019-07-23 Location: Germany, NRW, 47608 Geldern under the terrace Roof Size: 11 - 12 mm Thank you fatsemann attached the following image:  [101.9Kb] Edited by fatsemann on 24-07-2019 09:30 |
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| fatsemann |
Posted on 24-07-2019 09:30
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Member Location: Posts: 169 Joined: 09.10.17 |
Pic 2
fatsemann attached the following image:  [84.57Kb] |
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| fatsemann |
Posted on 24-07-2019 09:32
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Member Location: Posts: 169 Joined: 09.10.17 |
pic 3
fatsemann attached the following image:  [72.96Kb] |
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| fatsemann |
Posted on 27-09-2019 19:44
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Member Location: Posts: 169 Joined: 09.10.17 |
Hello, is there no Chance for an answer? |
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| Roger Thomason |
Posted on 27-09-2019 21:36
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 Member Location: Mossbank,Shetland Isles. Posts: 5268 Joined: 17.07.08 |
I showed it to David Clements via Facebook and he confirmed it is Leopoldius brevirostris and added " Very interesting. It has the black facial stripes which are often typical of British specimens, but very unusual in specimens from elsewhere in Europe". Regards Roger |
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| Ectemnius |
Posted on 28-09-2019 08:20
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Member Location: The Netherlands Posts: 847 Joined: 22.11.11 |
Hi fatsemann & Roger, Males are not really identifiable (excepting L. calceatus), I've done some work on Leopoldius in the lowlands and females are very easy to identify: https://www.resea..._Conopidae Regards, Ectemnius |
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| Roger Thomason |
Posted on 28-09-2019 16:40
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Member Location: Mossbank,Shetland Isles. Posts: 5268 Joined: 17.07.08 |
I showed David your response and he replied ;- "Ken Smith showed that the male of brevirostris usually has black stripes on the face in British material and that this does not occur in signatus, the only other spp that occurs here. There are consistent differences in the genitalia as well. It is true that males of this genus generally cannot be identified reliably, but until someone shows otherwise we can be reasonably certain that males with black facial stripes, like this specimen, are brevirostris". So possibly a square go between you in a carpark of your choosing might be the only way to resolve the matter... My reply  [kidding]  |
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| Ectemnius |
Posted on 28-09-2019 21:57
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Member Location: The Netherlands Posts: 847 Joined: 22.11.11 |
Hi Roger, I dont know what you mean by squares in carparks... However, identifications based on distribution is not a strong basis for an argument. I know that Jens-Hermann Stuke and (I think) David Clements tried to identify male Leopoldius by examining the male terminalia. And failed. I've looked at all the pinned material from the Netherlands and most males are very similar. Very few have a black face mark and L. signatus is very common here. Maybe males can be identified, but then one has to sequence a good number and show that facial colour indeed corresponds to species. Kind regards, Ectemnius |
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