http://www.sciencemag.org/cgi/content/full/327/5973/1613
And if, like me, you lack full access to Science, just read this: http://scienceblogs.com/tetrapodzoology/2010/03/tyrant_dinosaurs_in_australia.php
Benson, R.B.J., P.M. Barrett, T.H. Rich, & P. Vickers-Rich. 2010. A southern tyrant reptile.
Why "reptile"?