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Diptera.info :: Identification queries :: Diptera (adults)
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Ariasella lusitanica, Hybotidae
jorgemotalmeida
#41 Print Post
Posted on 16-03-2008 01:47
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another photo
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#42 Print Post
Posted on 16-03-2008 02:27
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another. Look at those awesome bristles curved in first pair. Frown
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Edited by jorgemotalmeida on 16-03-2008 02:49
 
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jorgemotalmeida
#43 Print Post
Posted on 16-03-2008 03:10
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this is amazing!
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#44 Print Post
Posted on 16-03-2008 03:28
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another one..detail of female (2 mm)
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#45 Print Post
Posted on 16-03-2008 03:29
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more detail of the female (with mpe). almost 5:1
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Edited by jorgemotalmeida on 16-03-2008 03:37
 
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#46 Print Post
Posted on 16-03-2008 03:43
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another..
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#47 Print Post
Posted on 16-03-2008 03:56
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another...
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#48 Print Post
Posted on 16-03-2008 04:06
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another..
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#49 Print Post
Posted on 16-03-2008 04:42
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Grin
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#50 Print Post
Posted on 16-03-2008 04:56
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another..
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#51 Print Post
Posted on 16-03-2008 05:35
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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. Pfft The weather's forecast (for North) was intense rain. Pfft 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. Wink When we reached to the place (near Barcelos), the sky was almost clear and the clouds were very far... rain, yeah.. Pfft Very quickly we almost run so we could take 2 hours in the field before sunset. awkward 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. Wink After 5 minutes, we found the first hybotid! hooray!! and it was a male! Great! Smile 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. awkward (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. Grin 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"... Smile 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... Frown).
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! Pfft

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... Smile
jorgemotalmeida attached the following image:


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Edited by jorgemotalmeida on 16-03-2008 16:19
 
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crex
#52 Print Post
Posted on 16-03-2008 09:29
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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
 
jorgemotalmeida
#53 Print Post
Posted on 16-03-2008 15:26
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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. Frown and yes, the male is alive. I keep it alive yet.. Frown 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. Smile They know much better hybotids than myself.
Edited by jorgemotalmeida on 16-03-2008 15:32
 
http://www.flickr.com/photos/superegnum
Paul Beuk
#54 Print Post
Posted on 16-03-2008 16:10
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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
#55 Print Post
Posted on 16-03-2008 16:15
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I told to Andrade to take photos of habitat. Smile 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.

 
http://www.flickr.com/photos/superegnum
Susan R Walter
#56 Print Post
Posted on 16-03-2008 16:30
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What an exciting and amusing weekend you two have had. I notice the male appears to be quite stiff in copula (no sniggering please Pfft) - 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
 
http://loirenature.blogspot.com/
jorgemotalmeida
#57 Print Post
Posted on 16-03-2008 16:39
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Grin precisely. he didn't care anything about the "MANY" bounces he had. Wink this is what I call "hard sex". Grin
 
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jorgemotalmeida
#58 Print Post
Posted on 16-03-2008 18:04
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another photo of the male.
farm3.static.flickr.com/2119/2337259845_b695866b6d_b.jpg
 
http://www.flickr.com/photos/superegnum
pierred
#59 Print Post
Posted on 16-03-2008 18:42
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Jorge,

All pictures are wonderful, but this last one is specially good, because one sees the vestigial wings very clearly.
Pierre Duhem
 
Tony Irwin
#60 Print Post
Posted on 16-03-2008 19:34
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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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