[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: birds/dino-birds with teeth



Hello. IMHO there is as many diets as there are beaked animals. You have
birds (carnivory, omnivory, granivory? [is that the word?], inscetivory,
etc.), pterosaurs, cynodonts, some parrot-fish to cite the few I have in
mind. They didn't lose their teeth for the same reason. Or does it mean that
whatever the diet, teeth are useless anyway? =;-)
Cheers,
Jean-Michel

----- Original Message -----
From: "John Conway" <john_conway@mac.com>
To: <larryf@capital.net>
Cc: <dinosaur@usc.edu>
Sent: Thursday, May 02, 2002 3:06 PM
Subject: 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/
>
>