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 unknown whitish fly - Neolimnophora virgo
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| jorgemotalmeida |
Posted on 15-08-2008 19:10
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 Member Location: Viseu - PORTUGAL Posts: 9295 Joined: 05.06.06 |
Hi This was spotted near Sagres on 12th August 2008. It was spotted on a beach on sand, near algae. They are extremely quick and with about 4 mm. What can it be? It has some resemblance with one milichiid... jorgemotalmeida attached the following image:  [180.54Kb] Edited by jorgemotalmeida on 26-10-2008 20:55 |
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| jorgemotalmeida |
Posted on 15-08-2008 19:13
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Member Location: Viseu - PORTUGAL Posts: 9295 Joined: 05.06.06 |
another...
jorgemotalmeida attached the following image:  [193.17Kb] |
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| cosmln |
Posted on 15-08-2008 19:34
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 Member Location: Romania Posts: 956 Joined: 18.03.07 |
Jorge, i think will be nice to see the whole fly  this in general (after i have seen your last posts). cosmln |
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| jorgemotalmeida |
Posted on 15-08-2008 19:38
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Member Location: Viseu - PORTUGAL Posts: 9295 Joined: 05.06.06 |
here comes the full body 
jorgemotalmeida attached the following image:  [188.75Kb] |
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| Stephane Lebrun |
Posted on 15-08-2008 19:40
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 Member Location: Le Havre, France Posts: 8248 Joined: 03.03.07 |
Could it be Neolimnophora virgo, Muscidae ? 
Stephane. |
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| jorgemotalmeida |
Posted on 15-08-2008 19:41
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Member Location: Viseu - PORTUGAL Posts: 9295 Joined: 05.06.06 |
st?phane why the admiration? |
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| jorgemotalmeida |
Posted on 15-08-2008 19:43
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Member Location: Viseu - PORTUGAL Posts: 9295 Joined: 05.06.06 |
this fly in ethanol turn out be all black very quickly! I never saw such thing. Decoloring so quick, in only 1 second! |
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| jorgemotalmeida |
Posted on 15-08-2008 19:57
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Member Location: Viseu - PORTUGAL Posts: 9295 Joined: 05.06.06 |
i was analyzing the specimen, and really the hind femur has no pv!  Also there are no abdominal spots. I agree: this must be a N. virgo! this is even better than the Achanthiptera |
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| Paul Beuk |
Posted on 15-08-2008 20:30
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 Super Administrator Location: Netherlands Posts: 19363 Joined: 11.05.04 |
The colour disappears that quickly because it is dusting. When a pale colour is cause by dusting it virtually always it disappears when the specimen is immerged in alcohol. You see the same thing happening with, for example, Dolichopodidae (dull grey-green Medetera instantly turn metallic green), Chamaemyiidae (distinctive silvery grey Leucopis suddenly are non-descript dark little flies) and numerous others. Since many dust patterns are in someway distinctive (helping identification) many entomologists are not to keen on material in alcohol. However, with a trained eye and good lighting you can still see the dust patterns. The colour of ducting, now that can be more problematic...
Paul - - - - Paul Beuk on https://diptera.info |
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| jorgemotalmeida |
Posted on 15-08-2008 20:39
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Member Location: Viseu - PORTUGAL Posts: 9295 Joined: 05.06.06 |
Very interesting! Thanks for this new info, Paul. I found this written by Adrian: "A problem with wet preserved material is that dusting is hard to see . However it is usually possible with a bit of experience and changing the lighting and background carefully. I find that alcohol preserves morphology (apart from dusting) much better than does dry-mounting but colour can be a problem. Experience with a particular key usually solves this problem but not always, especially as wet material tends to fade." inhttp://www.dipter...owstart=20 |
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| jorgemotalmeida |
Posted on 15-08-2008 20:48
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Member Location: Viseu - PORTUGAL Posts: 9295 Joined: 05.06.06 |
another shot.
jorgemotalmeida attached the following image:  [182.95Kb] |
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| Stephane Lebrun |
Posted on 15-08-2008 21:15
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Member Location: Le Havre, France Posts: 8248 Joined: 03.03.07 |
I hope Jere or Nikita could confirm my guess. The thickened arista in basal part, the typical frons with very large frontal triangle and multiple rows of setae let me think it's Neolimnophora . Moreover, the 2 rows presut. ac. with small one between them and small size lead to Neolimnophora virgo (Villeneuve,1906). Neolimnophora is sea coasts genus, so, it is at most only locally common. Edited by Stephane Lebrun on 15-08-2008 21:22 Stephane. |
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| jorgemotalmeida |
Posted on 15-08-2008 21:41
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Member Location: Viseu - PORTUGAL Posts: 9295 Joined: 05.06.06 |
yep. It makes sense. The Atlantic ocean was about less 1 km from the local I saw this beauty. The frontalia of this muscid is so beautiful. |
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| Paul Beuk |
Posted on 15-08-2008 22:23
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Super Administrator Location: Netherlands Posts: 19363 Joined: 11.05.04 |
jorgemotalmeida wrote: I swear, I did not read that before I posted. Very interesting! Thanks for this new info, Paul. I found this written by Adrian: "A problem with wet preserved material is that dusting is hard to see . However it is usually possible with a bit of experience and changing the lighting and background carefully. I find that alcohol preserves morphology (apart from dusting) much better than does dry-mounting but colour can be a problem. Experience with a particular key usually solves this problem but not always, especially as wet material tends to fade." inhttp://www.dipter...owstart=20 
Paul - - - - Paul Beuk on https://diptera.info |
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| jorgemotalmeida |
Posted on 16-08-2008 01:19
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Member Location: Viseu - PORTUGAL Posts: 9295 Joined: 05.06.06 |
Stephane Lebrun wrote: I hope Jere or Nikita could confirm my guess. The thickened arista in basal part, the typical frons with very large frontal triangle and multiple rows of setae let me think it's Neolimnophora . Moreover, the 2 rows presut. ac. with small one between them and small size lead to Neolimnophora virgo (Villeneuve,1906). Neolimnophora is sea coasts genus, so, it is at most only locally common. As more I see, I'm convinced that this is really a Neolimnophora virgo. Silvery dusting, that typical triangle on frons, the absence of abdominal spots, the absence of pv in hind femur... let's go wait for Nikita or Jere for final confirmation. |
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| jorgemotalmeida |
Posted on 18-08-2008 23:29
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Member Location: Viseu - PORTUGAL Posts: 9295 Joined: 05.06.06 |
I still need confirmation for this one. thank you. |
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| jorgemotalmeida |
Posted on 18-08-2008 23:29
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Member Location: Viseu - PORTUGAL Posts: 9295 Joined: 05.06.06 |
I still need confirmation for this one. thank you. |
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| jorgemotalmeida |
Posted on 24-08-2008 01:16
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Member Location: Viseu - PORTUGAL Posts: 9295 Joined: 05.06.06 |
the habitat for Neolimnophora virgo. spectacular place. jorgemotalmeida attached the following image:  [188.33Kb] |
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| jorgemotalmeida |
Posted on 26-10-2008 20:56
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Member Location: Viseu - PORTUGAL Posts: 9295 Joined: 05.06.06 |
S. Lebrun has just confirmed that this is a Neolimnophora virgo. |
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