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Re: Heterodontosaurs
From: Jonida@aol.com
>
> I thought only mammals have differentiated teeth.
This is not strictly true, there are even some heterodont lizards
(some species of varanids, for instance). It is just that mammals
*regularly* have heterodont dentition, and tend to be more *extreme*
in their heterodonty.
> Are there any other
> dinosaurs besides Heterodonts with differentiated teeth? Where did they come
> from and where did they go evolutionarily speaking?
The heterodontosaurids apparently evolved from basal ornithishchians,
and left no known descendents (i.e they were a "dead-end").
However, tyrannosaurids had slightly heterodont dentition, since their
maxillary teeth are quite distinct from their premaxillary teeth,
and the maxillary teeth tend to be larger towards the front.
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