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RE: new aspect of extinction



On Mon, 3 Feb 1997, Cunningham, Betty wrote:
> > [... theory about photoperiods and dino extinction ...]
> 
> This ties in with the reasoning I posted many years ago that the land   
> animals with functional pineal glands survived the K-T extinction,  and   
> [...]
>  I base this on the thickness of the parietal bone over the supposed area   
> of the pineal gland.  The Dinosauria (UC BERKELEY Press) has been quite   
> helpful in describing many species' skulls as having cartilage filling   
> this area, as well.  I assume very thick parietal bones would not let   
> light hit the pineal gland.  Neither would excessive amounts of   
> cartilage.
I suppose pachycephalosaurs would've been in particularly dire straits...

> [...]

+----------+    Rich Travsky   RTRAVSKY @ UWYO . EDU
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