Diptera.info :: Identification queries :: Diptera (adults)
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 Ariasella lusitanica, Hybotidae
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| jorgemotalmeida |
Posted on 16-03-2008 01:47
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 Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
another photo
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| jorgemotalmeida |
Posted on 16-03-2008 02:27
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Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
another. Look at those awesome bristles curved in first pair. 
jorgemotalmeida attached the following image:  [191.6Kb] Edited by jorgemotalmeida on 16-03-2008 02:49 |
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| jorgemotalmeida |
Posted on 16-03-2008 03:10
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Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
this is amazing!
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| jorgemotalmeida |
Posted on 16-03-2008 03:28
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Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
another one..detail of female (2 mm)
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| jorgemotalmeida |
Posted on 16-03-2008 03:29
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Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
more detail of the female (with mpe). almost 5:1
jorgemotalmeida attached the following image:  [192.46Kb] Edited by jorgemotalmeida on 16-03-2008 03:37 |
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| jorgemotalmeida |
Posted on 16-03-2008 03:43
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Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
another..
jorgemotalmeida attached the following image:  [191.58Kb] |
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| jorgemotalmeida |
Posted on 16-03-2008 03:56
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Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
another...
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| jorgemotalmeida |
Posted on 16-03-2008 04:06
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Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
another..
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| jorgemotalmeida |
Posted on 16-03-2008 04:42
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Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
jorgemotalmeida attached the following image:  [181.22Kb] |
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| jorgemotalmeida |
Posted on 16-03-2008 04:56
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Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
another..
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| jorgemotalmeida |
Posted on 16-03-2008 05:35
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Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
The story: I went to Oporto to meet Andrade and him brother. Our target: hunting to the new hybotid. There were some episodes before we could reach the place though.  The weather's forecast (for North) was intense rain. But even with this forecast I drove 150 km from Viseu to Barcelos and after 100 km I could reach to Oporto city (PORTO) and there I found my friends Andrade and him brother.  When we reached to the place (near Barcelos), the sky was almost clear and the clouds were very far... rain, yeah.. Very quickly we almost run so we could take 2 hours in the field before sunset.  It was about 5.10 pm when we arrived near Barcelos. The local is protected by Pinus cf. pinaster trees around. No feel of intense wind which is good. After 5 minutes, we found the first hybotid! hooray!! and it was a male! Great!  The hybotids run so fast, they are so irrequiet. They can almost pass unnoticed. They are *really* very small (around 2 mm - 3 mm) At unaided eye it is not easy to discern the vestigial wings. (Continuing..) Well, then.. we found another one... and more... and the count was in 5 WHEN we saw two hybotids copulating!! This way of copula is rather strange and hilarious. The female, all the time, pull the male. The male never moved all this time. He seems so relaxed (it seems in high...) and the female always run around but not so fast of course. The "dead" weight difficult her locomotion. Sometimes we could see the female uplift her hind legs and massaging her abdomen, the male... always quiet... very quiet... it seems that he thinks: "this is so boring"... The copula lasts over than one hour, we could not know about the beginning. Unfortunately, they finished their copula because we caused inadvertently the separation (it was very late! almost 7 pm... ). You can see the videos here in my youtube: http://www.youtub...cDrPbyA__c - female uplifting her hind legs during the copula http://www.youtub...ea4NEAnYUk - as you can see the male is always quiet as he was nearly dead... the female.. poor female... wandering with that weight! Male - vestigial wings; true dorsal (?) bristles curved on tibia of the first pair of legs; head with a very curious suture; plumose antenna near the base; Female - clearly no wings; swollen abdomen; bigger in size in relation with male (but the difference is not evident); legs more darker than the males; scutum and scutellum almost bare; curious the fact that the female has a much more plumose antenna (more conspicuous than the male): legs much more bare than the males - has some microtrichia in ventral fore legs; both have 3 ocelli(very small and around 0,1 mm?) Curious things - they jump when we took them in a stick and if this stick is around 10 cm to the ground they jump. They are very sensitive to movement, and maybe to the flash light, but clearly very sensitive to movement. They can be much more quick than a normal phorid fly, but not with many change of directions. On the ground, I never see them jumping, only wandering and running. questions: - why the female spent so much energy to load/transport the male... ? - why the male remains almost like a dead fly during the copula? - where they put the eggs?? - what is the time that it takes to get out since egg- imago stage? - what is the best time to spot them? - Is this species really common or very localized? - it seems that this species is tolerable to the pollution... the local has some degree of pollution. Is it possible to use this species to know if the local is free or not of pollution.. I mean: Can we use them for a good pollution level indicator? etc. Thanks. And for the final... a silhouette of this fantastic fly. and yes... we have hybotids for Paul, Adrian and Igor. I will give them to Andre in next week. I hope he can go to the Coimbra...
jorgemotalmeida attached the following image:  [187.27Kb] Edited by jorgemotalmeida on 16-03-2008 16:19 |
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| crex |
Posted on 16-03-2008 09:29
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 Member Location: Sweden Posts: 1996 Joined: 22.05.06 |
Interesting photos Rui and Jorge. I wonder how a fly without wings get's distributed? Did they spread a long time ago when the fly maybe had wing and this is what is left, an endemic population? Or is it maybe the egg/larva stages of their life that allows for distribution possibilities!? Or do they just wander about. I guess that last part depends on how specific their living environment is and what requires for them to survive. Did you see any more hunting activities or were they just humping around? Edited by crex on 16-03-2008 09:30 |
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| jorgemotalmeida |
Posted on 16-03-2008 15:26
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Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
crex wrote: Interesting photos Rui and Jorge. I wonder how a fly without wings get's distributed? Did they spread a long time ago when the fly maybe had wing and this is what is left, an endemic population? Or is it maybe the egg/larva stages of their life that allows for distribution possibilities!? Or do they just wander about. I guess that last part depends on how specific their living environment is and what requires for them to survive. Did you see any more hunting activities or were they just humping around? thanks crex. I was thinking the same! I think at the moment nobody knows the answer. It will be curious to know the rate of their dispersion and if even they migrated in the past, or not... No, we didn?t see any more hunting activities. Only busy with the observation of the copula... and with this video >>> http://www.youtub...tO59JiVAGE it seems that the female is trying to get off terminalia of the male, but this last don't do anything. and yes, the male is alive. I keep it alive yet.. Very strange this behaviour... female was dragging all the time the male. I will try to study this fly, but 300 km is not easy to get hands on it. I will give some indications to Andrade, and Igor, Paul and Adrian can help in this task too. They know much better hybotids than myself.
Edited by jorgemotalmeida on 16-03-2008 15:32 |
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| Paul Beuk |
Posted on 16-03-2008 16:10
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 Super Administrator Location: Netherlands Posts: 19403 Joined: 11.05.04 |
If you have, by any chance some photos of the micro and macrohabitats...
Paul - - - - Paul Beuk on https://diptera.info |
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| jorgemotalmeida |
Posted on 16-03-2008 16:15
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Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
I told to Andrade to take photos of habitat. You will see very soon those photos. Pinus cf. pinaster, Ulex spp., Prunus lusitanica, Eucalyptus spp. are the dominant plants there. The ground is mainly arenite and silt. The hybotids like hidden among the dry leaves of Eucalyptus spp. and use too the very slender leaves of Pinus sp. |
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| Susan R Walter |
Posted on 16-03-2008 16:30
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 Member Location: Touraine du Sud, central France Posts: 1802 Joined: 14.01.06 |
What an exciting and amusing weekend you two have had. I notice the male appears to be quite stiff in copula (no sniggering please ) - what I mean is he doesn't really move his legs or anything to protect himself from being bounced from rock to rock, but his limbs aren't flopping about limp either.
Susan |
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| jorgemotalmeida |
Posted on 16-03-2008 16:39
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Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
precisely. he didn't care anything about the "MANY" bounces he had. this is what I call "hard sex". |
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| jorgemotalmeida |
Posted on 16-03-2008 18:04
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Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
another photo of the male.  |
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| pierred |
Posted on 16-03-2008 18:42
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 Member Location: Paris (France) Posts: 1439 Joined: 21.04.05 |
Jorge, All pictures are wonderful, but this last one is specially good, because one sees the vestigial wings very clearly. Pierre Duhem |
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| Tony Irwin |
Posted on 16-03-2008 19:34
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 Member Location: Norwich, England Posts: 7262 Joined: 19.11.04 |
Those wings have got to be used in display - I can't think of any other reason why the male should have them. Wonderful photos, video and story, Jorge and Rui. Thanks for sharing it with us.
Tony ---------- Tony Irwin |
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