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Re: Microraptor -- "Biplane" or Not?



Hi!

$$ 10 for accessing an abstract for 2 days? Sounds ridiculous but I fear it`s 
not meant as a joke.

Greets!
Torsten



-------- Original-Nachricht --------
> Datum: Mon, 27 Sep 2010 22:39:50 +0000 (GMT)
> Von: Denver Fowler <df9465@yahoo.co.uk>
> An: DML <dinosaur@usc.edu>
> Betreff: Re: Microraptor -- "Biplane" or Not?

> >has any consensus been reached on how Microraptor deployed its hind
> >  wings= ? I know that it's=20 pretty much been established that the
> >  hind limbs were held beneath the body= during flight=2C but =20 has
> >  agreement been reached on whether the wing was held vertically or
> >  horiz= ontally? I'm working on=20 some drawings for a teacher friend
> >  of mine to show in class.
> >  =20
> >  Thanks=2C
> >  Scott Selberg
> 
> 
> That's a timely question.
> 
> There's a comment & reply just being published on that right now, in Proc.
> nat. 
> Acad. Sci:
> 
> http://www.pnas.org/content/early/recent
> 
> Jason BroughamandStephen L. Brusatte
> Distorted Microraptor specimen is not ideal for understanding the origin
> of 
> avian flight  PNAS published ahead of print September 23, 2010,  
> doi:10.1073/pnas.1004977107 
> 
> 
> 
> David E. Alexander, Enpu Gong,Larry D. Martin,David A. Burnham,and Amanda
> R. 
> Falk
> Reply to Brougham and Brusatte: Overall anatomy confirms posture and
> flight 
> model offers insight into the evolution of bird                           
>    
> flight  PNAS published ahead of print September 23, 2010,  
> doi:10.1073/pnas.1007798107 
> 
> 
> ----------------------------------
> Denver Fowler
> df9465@yahoo.co.uk
> http://www.denverfowler.com
> -----------------------------------
> 
> 
> 
> ----- Original Message ----
> From: David Marjanovic <david.marjanovic@gmx.at>
> To: DML <dinosaur@usc.edu>
> Sent: Mon, 27 September, 2010 15:24:01
> Subject: Re: Microraptor -- "Biplane" or Not?
> 
> Rescued from truncation:
> 
> >  Has any consensus been reached on how Microraptor deployed its hind
> >  wings= ? I know that it's=20 pretty much been established that the
> >  hind limbs were held beneath the body= during flight=2C but =20 has
> >  agreement been reached on whether the wing was held vertically or
> >  horiz= ontally? I'm working on=20 some drawings for a teacher friend
> >  of mine to show in class.
> >  =20
> >  Thanks=2C
> >  Scott Selberg
> 
> I don't think there's consensus on how far, if at all, *M.* was able to
> spread 
> its legs.
> 
> It's possible that the legs were more or less tucked in in flig
> ird, with the foot feathers pointing sideways and (both 
> feet together) forming a short extra wing (which was, of course, not
> flapped), 
> sort of like the extra wing between the wheels of some double- and 
> triple-deckers. The feathers on the rest of the legs would have had to
> point 
> backwards.
> 
> There doesn't seem to be a way to find out which way the feathers on the
> feet 
> pointed, let alone if they were mobile. The fossils are all squished flat,
> and 
> things like tendons aren't preserved.
> 
> 
> 
>       

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