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An Albertosaur Apart

To: dinosaur@usc.edu
Subject: An Albertosaur Apart
From: "Nicholas Gardner" <ratites637@hotmail.com>
Date: Thu, 31 Jul 2003 23:38:57 -0400
Reply-to: ratites637@hotmail.com
Sender: owner-dinosaur@usc.edu

I feel the need to pester you all about this merely because I am looking for data that I do not currently have and tyrannosaurids are my current focus.

http://www.dinosauria.com/jdp/trex/albert.htm

Does anyone feel that the specimens do constitute a separate species APART from the 'albertosaur'-grade taxa currently given specific names, i.e. _Gorgosaurus libratus_ and _Albertosaurus sarcophagus_. Also, does anyone still consider _G. sternbergi_ to be a separate species? And does anyone consider that _A. arctunguis_ is valid and referrable to _Gorgosaurus_, as discussed briefly (with no real data mentioned) in the page mentioned above? Final bothersome question is this, are the albertosaurs a grade or clade?


Nick Gardner

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