Re: Alamosaurus&T-rex

["Jerry D. Harris" <dinogami@hotmail.com>]

> Greetings,
> I remember reading that Alamosaurs inhabited New Mexico in the 
> Maastrichtian,
> and I also remember that this was in the southernmost border of 
> Tyrannosaurs
> rexs' range. Have T-rex and Alamosaur remains ever been found in the same
> sediments in New Mexico? Is there any direct evidence of T-rex preying on
> Alamosaurus? Thanks for any information.

  Yes, but there are problems. The "T. rex" (I use quotes on that because 
there is some debate on whether the fragmentary remains belong to that genus 
and species) is from the McRae Formation in south central New Mexico; 
fossils of _Torosaurus_ have also been recovered from this very localized 
unit, as have fragments assigned to _Alamosaurus_.  Most _Alamosaurus_ 
remains in New Mexico, however, all come from the San Juan Basin in 
northwestern new Mexico, from the Kirtland Formation; big theropod material 
from the same formation has usually been assigned to _Albertosaurus_ and/or 
_Daspletosaurus_ (with new material being prepped and studied presently); 
some teeth from the formation have been referred to cf. _Tyrannosaurus_, but 
teeth aren't much to go on.  There is no really good record as yet 
confirming that _Tyrannosaurus_ and _Alamosaurus_ coexisted.

> > > > > PLEASE NOTE NEW E-MAIL ADDRESS!!! <<<<<

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                     Jerry D. Harris
                 Fossil Preparation Lab
          New Mexico Museum of Natural History
                   1801 Mountain Rd NW
               Albuquerque  NM  87104-1375
                 Phone:  (505) 841-2809
                  Fax: ; (505) 841-2808
           >>>>> dinogami@hotmail.com <<<<<

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