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Re: Tyrannosaur teeth?



Speaking of teeth:  Will anything be coming out on the Hell Creek
troodontid teeth?

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On Wed, 3 Mar 2004 17:31:46 -0500 "Thomas R. Holtz, Jr."
<tholtz@geol.umd.edu> writes:
> > From: owner-vrtpaleo@usc.edu [mailto:owner-vrtpaleo@usc.edu]On 
> Behalf Of
> > Hoover Daniel
> >
> > So, did anyone know anything about juvenile tyrannosaurid teeth?
> 
> A trickier question than you might think, since there is 
> considerable
> contention over the age status of most of the skulls thought by some 
> to be
> juveniles of adult tyrannosaurids (i.e., is Nanotyrannus an adult or 
> a
> juvenile? Is the Jordan theropod a juvenile T. rex? etc.).
> 
> However, Phil Currie and colleagues have plotted the dimension of
> tyrannosaurid teeth to demonstrate some of the ontogenetic changes:
> Currie, P.J., Hurum,J.H., and Sabath,K. 2003.Skull structure and 
> evolution
> in tyrannosaurid dinosaurs. Acta Palaeontologica Polonica 48 (2):227 
> -234.
> 
> Currie and (other) colleagues have also described juvenile tyrant 
> teeth in:
> Currie, P. J., Rigby, J. K., Jr., and Sloan, R. E. 1990. Theropod 
> teeth from
> the Judith River Formation of southern Alberta, Canada. In: Currie, 
> P. J.,
> and Carpenter, K. (eds.). Dinosaur Systematics: Approaches and 
> Perspectives.
> Cambridge Univ. Press, Cambridge. Pp. 107-125.
> 
> and Thom Carr discusses dental ontogeny in his 1999 paper:
> Carr, T.D. 1999. Craniofacial ontogeny in Tyrannosauridae 
> (Dinosauria,
> Coelurosauria). JVP 19: 497-520.
> 
> Hope this helps,
> 
> 
>               Thomas R. Holtz, Jr.
>               Vertebrate Paleontologist
> Department of Geology         Director, Earth, Life & Time 
> Program
> University of Maryland                College Park Scholars
>               College Park, MD  20742
> http://www.geol.umd.edu/~tholtz/tholtz.htm
> http://www.geol.umd.edu/~jmerck/eltsite
> Phone:        301-405-4084    Email:  tholtz@geol.umd.edu
> Fax (Geol):  301-314-9661     Fax (CPS-ELT): 301-405-0796
> 
> 
> 



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