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Re: birds/dino-birds with teeth



Weight saving? How much do teeth weigh?

How about aerodynamic reasons? Having no lips, bird teeth would (very slightly) increase drag. This might go for toothless pterosaurs too. :-)

Or, isn't it more likely to be diet related? Many non-flying - and sometimes heavy - animals have lost their teeth through evolution.

On Thursday, May 2, 2002, at 11:03  PM, Larry Febo wrote:


-----Original Message----- From: Jane P. Davidson <jdhexen@unr.edu> To: dinosaur list <dinosaur@usc.edu> Date: Thursday, May 02, 2002 2:05 AM Subject: birds/dino-birds with teeth


Someone was asking me the other day what evolutionary advantage there
could have been for birds to have lost their teeth? (btw Greg Paul's book
is great--just finished it, now I am going back to re-read parts of it)


So I put this question to you -- what advantage could there have been for
birds to have evolved away from having teeth? I thought that an
interesting question. Jane D


I`m sure this has been argued before (check the archives), but the
"standard" answer to this question, back in my undergrad days (way back),
was that it was part of the evolving avian form in an attempt to lose weight
and be therefor better adapted for flight. (I think I may be quoting prof
Max Hecht on this).


John Conway, Palaeoartist

"All art is quite useless." - Oscar Wilde

Protosite: http://homepage.mac.com/john_conway/