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RE: Serration variation
On Thursday, February 10, 2000 12:28 AM, Dinogeorge@aol.com
> In a message dated 2/10/00 0:52:40 AM EST, NJPharris@aol.com writes:
> Don't think serrated teeth are the primitive
> condition in Archosauria.
Why? Serrated teeth are a common pattern in both Crurotarsi and dinos, as
well as aetosaurs (to the extent a foliate tooth is an extension of the
same principle, which it likely isn't). Serrated teeth do not appear below
the basal archosaurs, so far as I know. Their appearance seems to be
coordinated with loss of palatal teeth, which makes some intuitive
biomechanical sense. What's the problem?
Vertebrate Notes at