Timurlengia was a type of dinosaur that lived a very, very long time ago. It was a member of the Tyrannosaur family, which means it had big jaws with sharp teeth and was very good at hunting and eating other animals.
The thing that makes Timurlengia special is its skull. Scientists have found fossils of Timurlengia's skull and they say it's really different from other tyrannosaurs that lived at the same time. In particular, the part of the skull where Timurlengia's brain sat was much bigger than in other tyrannosaurs.
Why is this important? Well, having a big brain area usually means an animal is smarter - just like how people have big brains and can do lots of complicated things. For Timurlengia, having a bigger brain area might have given it some special skills that other tyrannosaurs didn't have.
So in summary, Timurlengia was a type of dinosaur with a big brain area that might have given it special skills compared to other similar dinosaurs.