Re: Tyrannosaur stuff

["T. Michael Keesey" <keesey@gmail.com>]

On 9/26/05, Thomas R. Holtz, Jr. <tholtz@geol.umd.edu> wrote:
> > From: owner-dinosaur@usc.edu [mailto:owner-dinosaur@usc.edu]On Behalf Of
> > Tim Williams
>
> > This is interesting, given that there is currently no evidence that the
> > small-bodied tyrannosauroids survived into the Late Cretaceous (unless
> > _Itemirus_ is a tyrannosauroid - and even this critter lived much earlier
> > than the big-ass tyrannosaurids of the Campano-Maastrichtian).
>
> Well, if _Bagarataan_ is a tyrannosauroid...

Oh yeah, forgot that one.

> [Back to Tim Williams]
>
> >  Late
> > Cretaceous dromaeosaurs, by contrast, came in all sizes.
>
> Not so much. At least, not so much in North America, at least: no real sign 
> of Achillobator-sized raptors in the land of rex and
> torosus.

And, even globally, LK dromaeosaurid (sensu lato) size diversity pales
in comparison to that in the EK, where you have everything from
_Microraptor_ to _Utahraptor_.

--
Mike Keesey
The Dinosauricon: http://dino.lm.com
Parry & Carney: http://parryandcarney.com