Darryl wrote >Could I get references for Stygivenator and Siamotyrannus please. Siamotyrannus isanensis : Buffetaut E, Suteethorn V, Tong H The earliest known tyrannosaur from the lower Cretaceous of Thailand Nature 1996; 381: 689-91 Gautam Majumdar gautam@majumdar.demon.co.uk