While Tyrannosaurs were common in North America, Asia and Europe, next to no Tyrannosaurs have ever been discovered in the
First southern tyrannosaur

The location of the discovered Tyrannosaur

southern hemisphere. No-one really knows why, but the southern hemisphere seemed to be ruled by Abelisaurids, slightly smaller theropods with even shorter arms than the tyrannosaurs. Sauropods also lived in the southern hemisphere, while in the north, ceratopsians and hadrosaurs made up the diet of a predator.

However, recently a tyrannosaur has been discovered in the southern hemisphere - in Dinosaur Cove, Australia. This is the first tyrannosaur to be discovered in the southern hemisphere, and it is yet to be named.