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Re: Ostrich Wings Explain Mystery of Flightless Dinosaurs



Perhaps the wings can add to maneuvrability whether or not the tail is
present... It will be a great paper...


2010/7/1 Jura <pristichampsus@yahoo.com>:
> Maybe so, but tail reduction and tail loss are not the same thing. Even 
> _Archaeopteryx_ had a tail of appreciable length (at least equal to body 
> length). Even reduced, the tail would still provide an effective 
> counterbalance.
>
> Jason
>
>
> --- On Thu, 7/1/10, dinoboygraphics@aol.com <dinoboygraphics@aol.com> wrote:
>
>> From: dinoboygraphics@aol.com <dinoboygraphics@aol.com>
>> Subject: Re: Ostrich Wings Explain Mystery of Flightless Dinosaurs
>> To: pristichampsus@yahoo.com, dinosaur@usc.edu
>> Date: Thursday, July 1, 2010, 5:39 PM
>> Actually, viewed phylogenetically
>> those lineages all show tail reduction (in either mass it
>> length...but rarely both) relative to the the plesiomorphic
>> condition.
>>
>> -Scott
>> Sent from my Verizon Wireless BlackBerry
>>
>> -----Original Message-----
>> From: Jura <pristichampsus@yahoo.com>
>> Sender: owner-DINOSAUR@usc.edu
>> Date: Thu, 1 Jul 2010 12:02:39
>> To: <dinosaur@usc.edu>
>> Reply-To: pristichampsus@yahoo.com
>> Subject: Re: Ostrich Wings Explain Mystery of Flightless
>> Dinosaurs
>>
>> The finding is neat, and I'm all for comparison with extant
>> animals, but I wonder how pertinent it would actually be to
>> dinosaurs. The paper seems to talk about ostriches using
>> their wings for balance during agile maneuvers, but this is
>> for a tailless animal. The theropods that gave rise to
>> birds, all had nice long tails to do much of the
>> counterbalance work. I'm just wondering if the results
>> Schaller found might more accurately reflect an exaptation
>> by ratites to a secondarily flightless existence, rather
>> than a plesiomorphic behaviour.
>>
>> Perhaps Scott covered this in his paper. I haven't had a
>> chance to read it, as JVP is being finicky about their
>> archives (i.e. supplement to No.3 for vol. 20 doesn't show
>> up on the site).
>>
>> Jason
>> --- On Thu, 7/1/10, dinoboygraphics@aol.com
>> <dinoboygraphics@aol.com>
>> wrote:
>>
>> > From: dinoboygraphics@aol.com
>> <dinoboygraphics@aol.com>
>> > Subject: Re: Ostrich Wings Explain Mystery of
>> Flightless Dinosaurs
>> > To: dinosaur@usc.e
>  Thursday, July 1, 2010, 2:17 PM
>> > Gee, now where have I heard that idea
>> > before?  Oh yeah:
>> >
>> > Hartman, Scott. 2000. Primary and caudal feathers as
>> > locomotory adaptations in maniraptoran theropods.
>> Journal of
>> > Vertebrate Paleontology, Vol. 20, Supplement to No. 3.
>> pp.
>> > 47A.
>> >
>> > Hartman, Scott. 2005. Estimating Ancestral Habitat
>> and
>> > Selective Pressures Leading to the Origin of Avian
>> > Flight. Abstract volume of the II Latin American
>> Congress
>> > of Vertebrate Paleontology.
>> >
>> > Awesome to see corroborating data from extant
>> > animals.  And it's my fault of course for not having
>> a
>> > paper in print yet, but there were a couple of extra
>> steps
>> > that I had to look into along the way.  Soon...
>> >
>> >
>> >
>> > Scott Hartman
>> > Scientific Advisor/Technical Illustrator
>> > (307) 921-9750
>> > www.skeletaldrawing.com
>> >
>> >
>> > -----Original Message-----
>> > From: Ian Paulsen <birdbooker@zipcon.net>
>> > To: dinosaur@usc.edu
>> > Sent: Thu, Jul 1, 2010 1:06 pm
>> > Subject: Ostrich Wings Explain Mystery of Flightless
>> > Dinosaurs
>> >
>> >
>> > HI:FYI:http://news.yahoo.com/s/livescience/2010
>
>> ric
>> > hwingsexplainmysteryofflightlessdinosaurs-- Ian
>> > PaulsenBainbridge Island, WA, USA" Which just goes to
>> show
>> > that a  passion for books is extremely unhealthy."
>> from
>> > Cornelia Funke's "Inkheart".
>> >
>>
>>
>>
>>
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