Tyrannosaur nomenclature (was Hadrosaur nomenclature)

[Dinogeorge@aol.com]

In a message dated 10/16/01 2:30:37 PM EST, paleo_mont@excite.com writes:

<< You could also do the same with Campanion aged Tyrannosaurs making them 
all Albertosaurs. >>

This is something I presently agree with. They're three or more different 
species within the genus Albertosaurus. Basically they differ from one 
another >slightly< in limb proportions/robustness (if this isn't 
ontogenetic/sexual), positions of a couple of cranial openings, shapes of the 
lacrimals, and tooth counts and shapes. Tyrannosaurus and Tarbosaurus are 
>much< different from Albertosaurus.