<P> Tyrannosaurus is a genus of coelurosaurian theropod dinosaur . The species Tyrannosaurus rex ( rex meaning `` king '' in Latin ) , is one of the most well - represented of the large theropods . Tyrannosaurus lived throughout what is now western North America , on what was then an island continent known as Laramidia . Tyrannosaurus had a much wider range than other tyrannosaurids . Fossils are found in a variety of rock formations dating to the Maastrichtian age of the upper Cretaceous Period , 68 to 66 million years ago . It was the last known member of the tyrannosaurids , and among the last non-avian dinosaurs to exist before the Cretaceous -- Paleogene extinction . </P>
<P> Tyrannosaurus is a genus of coelurosaurian theropod dinosaur . The species Tyrannosaurus rex ( rex meaning `` king '' in Latin ) , is one of the most well - represented of the large theropods . Tyrannosaurus lived throughout what is now western North America , on what was then an island continent known as Laramidia . Tyrannosaurus had a much wider range than other tyrannosaurids . Fossils are found in a variety of rock formations dating to the Maastrichtian age of the upper Cretaceous Period , 68 to 66 million years ago . It was the last known member of the tyrannosaurids , and among the last non-avian dinosaurs to exist before the Cretaceous -- Paleogene extinction . </P>
what time period did the t rex live in
what time period did the t rex live in
Cretaceous Period
Cretaceous Period