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RE: Land of the Lost review-spoiler?
John Scanlon <email@example.com> wrote:
> The rhamphotheca does not occur in squamates, consistent with it
> always developing from a caruncle, and apparently always suppresses
> development of adjacent teeth (e.g. dinosaurs with premaxillary teeth
> would not also have an upper-jaw beak, a point not always
> observed in reconstructions).
I might be misunderstanding your point, but dinosaurs can have both an
upper-jaw beak and premaxillary teeth, can't they? I have ornithischians
especially in mind. For example, all ceratopsians have a beak (upper & lower
jaw). However, the presence of premaxillary teeth varies among ceratopsian
taxa. _Chaoyangsaurus_, _Yinlong_, _Protoceratops_, _Archaeoceratops_ and some
others have premaxillary teeth, but _Psittacosaurus_ and most neoceratopsians
(BTW, thanks for a nice summary of carunculate tetrapods... very interesting
stuff. I didn't know about the connection with beaks.)
> "Get this $%#@* python off me!", said Tom laocoonically.
:-) Yeah, I read this a few times before I got it. I hope Tom fared better
than poor Laocoon.