Re: Tyrant Notes

["T. Mike Keesey" <tkeese1@gl.umbc.edu>]

On Sun, 5 Apr 1998, DE SOSA wrote:

>       I've been looking at various cladograms available on the web
> (Mike Keesey's and Stan Friesen's, mostly) and they both seem to say
> that all Lancian tyrannosaurs of North America should be included in
> Tyrannosaurus.  This includes Nanotyrannus lancensis and Dinotyrannus
> megagracilis. 
Actually, on my page _Dinotyrannus_ is separate, although I mention the
possibility of it being a subadult _T. rex_.

> Also, they say Maleevosaurus novojilovi should be in
> included in T. bataar or T. efremovi (what's the diff between these two,
> anyway?).  I would like to know the popular opinion on this theory.  Is
> this widely accepted, or a "heresy" (a la Bakker)? 
It isn't universally accepted, which is why I present the alternative as
well.

>       Oh yes, one more thing on the subject of tyrannosaurs.  In
> Horner's "The Complete T. rex", he mentions 4 undescribed species: a
> "stretch-snouted" daspletosaur, a Horseshoe Canyon (?)daspletosaur, a
> non-Albertosaurus libratus , and a Tyrannosaurus/Daspletosaurus
> intermediate.  Anybody know what's up with these guys?  It's been 5
> years since the book came out.

I have a pic of the "stretch-snouted" daspletosaur on my site. Don't know
about the others...

--T. Mike Keesey
tkeese1@gl.umbc.edu
DINOSAUR WEB PAGES -- http://www.gl.umbc.edu/~tkeese1/dinosaur/index.htm