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Re:Function of furcula ( was... OLD ORNITHOMIMOSAURS)



-----Original Message-----
From: Larry Febo <larryf@capital.net>
To: David Marjanovic <david.marjanovic@gmx.at>; The Dinosaur Mailing List
<dinosaur@usc.edu>
Date: Sunday, September 17, 2000 8:46 AM
Subject: Re: OLD ORNITHOMIMOSAURS



>>
>>Hey, thank you (Timothy Williams) for that link! Otherwise I still
wouldn't
>>know that Syntarsus had a furcula :-o ! I used to think furculae were a
>>neotetanurine or tetanurine synapomorphy (with convergence in
>>Longisquama)...
>>        Does anyone have an idea about what furculae are actually good
for?
>
>
>About a year ago, I saw a program on TV about some recent studies of bird
>flight using x-ray motion pictures of them in flight in a wind tunnel.
These
>researchers stated that the furc was functioning as a springlike mechanism
>to aid in rapid wingbeat.
>
>Another study: http://www.stfx.ca/people/edemont/abstracts/jason.html sees
>the furcula as an aid in the respiratory function of birds in flight.
>
>Perhaps it serves as both, It only follows that during rapid muscle
activity
>in rapid wingbeat, more rapid respiration is essential!
>
>
>(by the way,....it seems the furcula had a very specific, specialized
function in birds. Speaks well for BCF. What could have been it`s function
in extinct mesozoic theropods other than "vestigial" I`d like to
know......?)
>