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Re: Paleogeography (was Re: Early Ceratopian)




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> From: Thomas R. Holtz, Jr. <th81@umail.umd.edu>
> To: rjmeyer@ix.netcom.com
> Cc: dinosaur@usc.edu
> Subject: Paleogeography (was Re: Early Ceratopian)
> Date: Monday, October 19, 1998 11:37 AM
> 
> At 05:00 PM 10/16/98 -0500, Rob Meyerson wrote:
> >Thanks to all for the multiple corrections stating that _Psittacosaurus_
is
> still the oldest ceratopian (perhaps we can call Zuni the "oldest known
> quadrepedal ceratopian"; how many variations can we come up with?  :^)
> 
> *sigh*.  Nope, we don't know for certain that _Zuni._ is older than other
> non-horned quadrupedal ceratopsians, due to the poor resolution of the
ages
> of most Late Cretaceous central Asian formations.
> 
> It REMAINS however, the oldest known brow-horned ceratopsian, which is
what
> Wolfe & Kirkland called it.
> 
>Is enough of the specimen known to determine whether it is Chasmosaurine
or Centrosaurine ? BTW , there's pictures of the horn cores in the December
'97 issue of Earth magazine , in the article ' Horns of Plenty ' . Thanks .

Regards , Truett Garner