RE: Questions about T. rex and Nanotyrannus

["Thomas R. Holtz, Jr." <tholtz@umd.edu>]

Nope, no paper as such to support it.

There are some field localities where robust small teeth and blade like small 
teeth are found together. The  pro-Nano camp interprets these as teeth of two 
taxa; the anti-Nano camp as teeth of different tooth positions in different 
sized individuals.

Thomas R. Holtz, Jr.
Email: tholtz@umd.edu   Phone: 301-405-4084
Office: Centreville 1216                        
Senior Lecturer, Vertebrate Paleontology
Dept. of Geology, University of Maryland
http://www.geol.umd.edu/~tholtz/
Fax: 301-314-9661               

Faculty Director, Science & Global Change Program, College Park Scholars
http://www.geol.umd.edu/sgc
Fax: 301-314-9843

Mailing Address:        Thomas R. Holtz, Jr.
                        Department of Geology
                        Building 237, Room 1117
                        University of Maryland
                        College Park, MD 20742 USA

> -----Original Message-----
> From: owner-DINOSAUR@usc.edu [mailto:owner-DINOSAUR@usc.edu] On Behalf Of 
> quailspg@frii.com
> Sent: Monday, April 21, 2014 9:08 AM
> To: Dinosaur
> Subject: Questions about T. rex and Nanotyrannus
> 
> LISTERS --
> 
> The other night I saw, for the first time, an episode of "Jurassic Fight 
> Club" (first aired in 2008, I think) where young Tyrannosaurus
> rexes duked it out with an adult Nanotyrannus lancensis somewhere in South 
> Dakota.
> Setting aside the thousand obvious things that could be said about this 
> series, I have a couple specific questions.
> 
> I missed the first half of the show, so I missed where they apparently talked 
> about the fossil evidence for this encounter. They
> seemed to be saying that remains of two species were collected at the same 
> site.
> 
> My question is, what were the physical differences supporting the conclusion 
> that one of the animals was a young T. rex (and the
> other N.
> lancensis)? Can someone point me to a paper or other source where this 
> possibility was discussed?
> 
> -- Donna Braginetz