Tyrannosaurus rex

The Tyrannosaurus rex, colloquially referred to as the T-Rex, are a well-known dinosaur species that lived during the Cretaceous period.

History
In what would eventually become known as South Dakota, 69,997,983 BC (during the Cretaceous period), the time-stranded Ray Palmer was forced to survive in the world dominated by dinosaurs, encountering at least one female Tyrannosaurus rex (which he nicknamed Gertrude) and possibly a male as well. Ray was confronted by Gertrude before he was rescued by Nate Heywood and Mick Rory.

When the Waverider crash-landed back in the same geological time period, Ray led Nate and Amaya Jiwe to retrieve a component of the ship, which had ironically ended up in Gertrude's nest. When Gertrude came across them later, Amaya used the Anansi Totem to use the spirit of a T-Rex to communicate with the female, resulting in Gertrude leaving them in peace.

A terror of T-Rex appeared en masse in 2017's Los Angeles after the actions of the Legends created a time storm and "broke time", however they were relatively quickly captured by Rip Hunter's Time Bureau and sent back to their time.

Known Tyrannosaurus rex

 * Gertrude

Behind the scenes

 * in the real world, the species Tyrannosaurus rex (rex meaning "king" in Latin), often called T. rex or colloquially T-Rex, is one of the most well-represented of the large theropods. 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.