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Re: Serration variation
Toby White wrote-
>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?
I have two comments regarding this serration debate:
1. Serrated teeth are known outside of Archosauria- iguanids and varanids
have serrations at least.
2. Small tooth size does not always indicate the lack of serrations, as seen
in Koparion douglassi, a troodontid with serrated teeth two millimeters
long. Obviously small teeth aren't incapable of having serrations and the
issue probably has more to do with diet than size (although these are