Thread:MarkJira/@comment-28675190-20160615131216

i believe they evolved in asia ut i need to check. I believe the first tyrannosaurid diolong was in asia and then crossed a land bridge or something like that into north america. I believe it is as follows diolong evolves, gaunlong evolves, one moves to north america, then they diversify into gorgosaurus, daspletosaurus and albertosaurus. in asia tarbosaurus evolves. in north america trex evolves. i still need to check that. want to help me? the finished result will be a blog post on it.  