Re: Tyrannosaurs, dwarf, early, and otherwise...

[TWILLIAMS@canr1.cag.uconn.edu]

Tom Holtz wrote:

>"_Nanotyrannus_" is a juvenile. [...] The simplest explanation is
>that it is a juvenile _T. rex_, although the possibility does remain it is 
>a
>juvenile of an as yet otherwise unknown Hell Creek _Tyrannosaurus_ species.


Musing out loud here...  It's also been suggested that _Maleevosaurus_ might 
be a juvenile _Tarbosaurus_ (Carr, 1996; Holtz, 1997 - both SVP meeting 
abstracts).  I wonder if _Shanshanosaurus_ might also be a juvenile 
_Tarbosaurus_.


Tim


References

Carr, T.D. (1996)  Craniofacial ontogeny in tyrannosaurids: taxonomic 
implications.  J. Vert. Paleont. 16(3): 25A.

Holtz, T.R., Jr (1997)  Preliminary phylogenetic analysis of the 
Tyrannosauridae (Theropoda, Coelurosauria).  17(Suppl): 53A.