Re: Gorgosaurus (was RE: Daspletosaurus temporal/stratigraphic range)

[Dinogeorge@aol.com]

In a message dated 8/7/02 8:01:04 AM Pacific Daylight Time, 
dinoguy@sympatico.ca writes:

<< Last I heard (many moons ago), a dissertation on Mongolian tyrannosaurs 
was 
 in the works by Karol Sabath.  Was I misinformed? Might this become a paper 
 eventually, or is there a way to get a copy of this, if it was completed? >>

Coming soon in Acta Palaeontologia Polonica, I believe. I think Hurum will be 
a coauthor, and perhaps also Phil Currie.

Meanwhile, my own genericometer sees Albertosaurus, Gorgosaurus, and 
Daspletosaurus as three distinct species of the genus Albertosaurus. One 
diagnostic character uniting them is the presence of a lacrimal horn that 
protrudes above the skull table. Different shapes of the horn serve to 
distinguish the species, among other things (such as tooth morphology).

Albertosaurus torosus
Albertosaurus libratus
Albertosaurus sarcophagus (type)