R: Tyrannosaurs, dwarf, early, and otherwise...

["Alessandro Marisa" <amaris@tin.it>]

-----Messaggio originale-----
Da: Thomas R. Holtz, Jr. <th81@umail.umd.edu>
A: dinosaur@usc.edu <dinosaur@usc.edu>
Data: martedì 13 luglio 1999 17.30
Oggetto: Tyrannosaurs, dwarf, early, and otherwise...

>Earliest tyrannosaurids: _Alectrosaurus olseni_ is the oldest named
definite
>tyrannosaurid.  Older material includes teeth from Aptian-Albian of Asia
and
>the Cenomanian of North America.  If _Siamotyrannus_ is a tyrannosaurid, it
>is even older (Barremian).  _Stokesosaurus_ (a Late Jurassic form) has been
>referred to Tyrannosauridae or Tyrannosauroidea, and is even older still;
>its placement here, however, remains uncertain.


Sorry, but I don't think that Siamotyrannus is an earliest Tyrannosaurids, I
think that _Siamo_ is a Sinraptoridae, there are some evidence in the pelvic
girdle.

By
Alessandro Marisa
 "Volunteer of Paleontological Museum of Monfalcone"
Via Achille Grandi n°18
38068 ROVERETO (TN) ITALY
Tel: 039-0464-434658 Email: amaris@tin.it