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Re: Making Lip of It
On Thu, Sep 22nd, 2011 at 6:03 PM, David Marjanovic <firstname.lastname@example.org>
> > I think they were referring to a greater degree of overbiting, where
> > the upper tooth spans most of the height of the lower jaw (as in the
> > canines of cats or the teeth of Dilophosaurus).
> Even so, the canines of cats are fully covered by lips.
Some siamese cats develop super-occluded upper canines that permanently
protrude below the
lips. I don't know whether it causes them any problems. It certainly makes them
Sabretoothed cats certainly seem to have coped with permanently exposed
canines. As do extant
male musk deer. Naked mole rats have forgone lips altogether - although their
maintain a constant level of humidity, and their teeth grow and are worn down
at a much greater
rate than for most mammals.
Spatial Data Analyst Australian Dinosaurs
Melbourne, Australia http://home.alphalink.com.au/~dannj