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Re: tyrannosaurids (Nanotyrannus)

>If Carpenter is right about the lack of unique features *and*
>Bakker is right about the fused sutures, then this suggests
>that it is a dwarf *species* of Tyrannosaurus, that is it
>should be Tyrannosaurus lancensis.

This wouldn't be a bad idea.  One problem is that fused sutures are not
always indicative of the final growth stage - for example, some bird
species continue to grow after their skulls are fused up.

Thomas R. Holtz, Jr.                                   
Vertebrate Paleontologist in Exile                  Phone:      703-648-5280
U.S. Geological Survey                                FAX:      703-648-5420
Branch of Paleontology & Stratigraphy
MS 970 National Center
Reston, VA  22092