Re: Selective Extinction

[Phillip Bigelow <bh162@scn.org>]

tkeese1@gl.umbc.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?

The biggest pterosaur known, _Q. northropi_, was a Maastrichtian
taxon, but it is problematic that it made it to the boundary.

There are no mentioned, illustrated, or  described taxa from the
Hell Creek Formation in Montana (to my knowledge).
                         <pb>