Jurassic Park Wiki

Nanotyrannus (meaning "dwarf tyrant") is an extinct genus of tyrannosaurid theropod dinosaur that lived in North America during the Late Cretaceous period. Some paleontologists believe that it is simply a juvenile Tyrannosaurus rex, while others argue that it belongs to it's own genus.

Jurassic Park franchise

Nanotyrannus has so far only been featured in the Dinopedia of the Jurassic Park Institute.