Re: tyrannosaurids

[Stan Friesen <swf@ElSegundoCA.ATTGIS.COM>]

>From: Chartier Michel <chartiem@ere.umontreal.ca>
 > 
 > > Nanotyrannus lancensis (Gilmore 1946)   late Maastrichtian, western North
 > > America
 > >         (?= juvenile T. rex?)
 > > 
 > Tom:
 >      I was pretty convinced that this individual was an adult. Why then
 > the doubts about the validity of this taxon?
 > 
I feel the same.  As I remember it, the skull shows fairly extreme
suturing, which indicates not merely adult, but actually old age.

Also, it has some rather unique anatomical features that place it
a bit out of the "main line" of tyrannosaurid anatomy.

swf@elsegundoca.ncr.com         sarima@netcom.com

The peace of God be with you.