Diptera.info :: Identification queries :: Diptera (adults)
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 Genital Lassoo (Cowboy fly)
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| Gordon |
Posted on 17-10-2008 09:36
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 Member Location: Lake Kerkini, Greece Posts: 1099 Joined: 02.01.08 |
This is a very nice fly from Wetland Kerkini 25 May to 1 June 2008, caught in a marsh at 1,485 ASL. The following observations have not helped me much, but may be of use to others. Anal vein long, almost to wing margin CUP and CUA2 both present DM-CU absent BM-CU very close to R-M such that there are no cross veins in the distal 3/4 of the wing. P-Bristles present and diverging 2 x F- Bristles present, the lower curving inwards, the upper curving out and backwards. 3 Dorsocentrals on scutum, strangely the first is doubled on the left side, see photo. Gordon attached the following image:  [78.29Kb] Edited by Gordon on 17-10-2008 16:13 |
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| Gordon |
Posted on 17-10-2008 09:39
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Member Location: Lake Kerkini, Greece Posts: 1099 Joined: 02.01.08 |
The aforementioned lassoo
Gordon attached the following image:  [49.01Kb] |
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| Paul Beuk |
Posted on 17-10-2008 09:42
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 Super Administrator Location: Netherlands Posts: 19324 Joined: 11.05.04 |
An agromyzid for Milos.
Paul - - - - Paul Beuk on https://diptera.info |
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| David Gibbs |
Posted on 17-10-2008 09:50
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 Member Location: Bristol, UK Posts: 833 Joined: 17.06.06 |
Phytomyza cf. ranunculi, the "lassoo" (=distiphallus) seems to be broken, should be much longer coiled round several times. |
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| Gordon |
Posted on 17-10-2008 10:59
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Member Location: Lake Kerkini, Greece Posts: 1099 Joined: 02.01.08 |
Thanks. Ah, I thought it must be an Agromyzid, but I was deluded into thinking that all the F-bristles should be incurving, and thus it could not be. We live and learn. I will use the word distiphallus in future David, I promise. Gordon |
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| mcerny |
Posted on 17-10-2008 11:26
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Member Location: Czech Republic Posts: 669 Joined: 15.07.08 |
yes this is Phytomyza ranunculi (Schrank, 1803) Milos |
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| Gordon |
Posted on 17-10-2008 13:08
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Member Location: Lake Kerkini, Greece Posts: 1099 Joined: 02.01.08 |
Thanks Milos, what is intersting to me is the doubling of the 1st left side dorsocentral, presumably a result of a coding error somewhere. Do you, or does anybody, know if this sort of thing is regularly noted in diptera? Gordon |
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| Susan R Walter |
Posted on 17-10-2008 14:21
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 Member Location: Touraine du Sud, central France Posts: 1802 Joined: 14.01.06 |
Well we had one just recently with Henry's Calliphora vicina http://www.dipter...d_id=16603. Theo reckons 1 in 1000, so not uncommon.
Susan |
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| Gordon |
Posted on 17-10-2008 15:19
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Member Location: Lake Kerkini, Greece Posts: 1099 Joined: 02.01.08 |
Thanks Susan. |
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| Kahis |
Posted on 17-10-2008 16:53
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 Member Location: Helsinki, Finland Posts: 1999 Joined: 02.09.04 |
I some families such obvious asymmetry it very common. Chamaepsila (Psilidae) is one genus where quite a few specimens have more dorsocentral setae on one side. "Happily" all Chamaepsila keys I've seen use the number of dc setae as a key characters, which results in endless hours of fun*. *offer not valid for sane people Kahis |
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| Gordon |
Posted on 17-10-2008 18:10
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Member Location: Lake Kerkini, Greece Posts: 1099 Joined: 02.01.08 |
Dear Kahis, Your avatar is most appropriate to your comments in this thread, amazing. Gordon Edited by Gordon on 17-10-2008 18:11 |
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