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http://www.ucmp.berkeley.edu/trex/trexpo.html will supply you with
T-Rex data to stoke any 5th grader's imagination for a while.
Thomas R. Holtz, Jr. wrote:
> At 05:06 PM 10/31/97 PST, you wrote:
> >Tyrannosaurus is one of the best known carnivorous dinosaur. This genus
> >encompasses five different species.
> Maybe. T. luanchuanensis is a non-diagnostic form. There may be only two
> species within Tyrannosaurus..
> >Tyrannosaurus rex is from USA and
> >Canada. It was about thirteen meters long. Tyrannosaurus efremovi was from
> >Mongolia. It was about eleven meters long. Tyrannosaurus bataar is a
> >thirteen meters long predator from China and Mongolia.
> Note that it is very difficult to tell if T. bataar is simply a fully grown
> T. efremovi, or a different species. The type specimen (skull and
> fragmentary postcrania) of T. bataar lacks those parts of the anatomy which
> would show whether it has the derived states found in T. rex or the derived
> states found in T. efremovi. Also, T. bataar is only known from Mongolia.
> >novojilovi was the smallest species with "only" six meters. It was from
> And may be no more than a juvenile of T. bataar and/or T. efremovi.
> >Tyrannosaurus luanchuanensis is from China. I think it was twelve
> >or thirteen.
> Just teeth. Not a diagnostic taxon.
> >Tyrannosaurus has long teeth, powerful jaws, a short neck,
> >very short forelimbs with two fingered hands, long hindlinbs with birdlike
> >feet, and a long tail. It was one of the largest of all carnivorous
> Thomas R. Holtz, Jr.
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