Re: Selective Extinction

[Chris Campbell <sankarah@ou.edu>]

T. Mike Keesey wrote:
> 
> On Mon, 27 Oct 1997, Bettyc wrote:
> 
> > birds, of course, survived, whereas pterasauroids did not so if you can
> > perhaps explain why?
> 
> My understanding is that there just weren't many pterosaurs around at the
> end of the Cretaceous. Just a few gigantic azhdarchids. Am I wrong?

Nope.  Pterosaurs, along with the majority of other dinosaur and marine
reptile groups, were all but gone by the end of the Cretaceous.  Only a
couple of dino groups were expanding; the rest had been in decline for a
good 9 million years at least.

Chris