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RE: Making Lip of It

My family had a large male American shorthair with protruding upper canines. We 
all thought this 20-pound muscled pure black monster was cute (and he was).


  Jaime A. Headden
  The Bite Stuff (site v2)

"Innocent, unbiased observation is a myth." --- P.B. Medawar (1969)

"Ever since man first left his cave and met a stranger with a
different language and a new way of looking at things, the human race
has had a dream: to kill him, so we don't have to learn his language or
his new way of looking at things." --- Zapp Brannigan (Beast With a Billion 

> Date: Fri, 23 Sep 2011 10:22:09 +1000
> From: dannj@alphalink.com.au
> To: dinosaur@usc.edu
> Subject: Re: Making Lip of It
> On Thu, Sep 22nd, 2011 at 6:03 PM, David Marjanovic <david.marjanovic@gmx.at> 
> wrote:
> > > 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 look creepy.
> 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 
> burrows probably
> maintain a constant level of humidity, and their teeth grow and are worn down 
> at a much greater
> rate than for most mammals.
> --
> _____________________________________________________________
> Dann Pigdon
> Spatial Data Analyst Australian Dinosaurs
> Melbourne, Australia http://home.alphalink.com.au/~dannj
> _____________________________________________________________