Megalosaurus This British theropod was the first dinosaur ever to be named.It lived in the Late Mid-Jurassic, 166 million years ago and in SouthernEngland, and is estimated to have been around 6m (20 ft) in length. It was amuscular creature with an elongated head reminiscent of its close relative,Torvosaurus. The new updated model replaces the existing old, and outdatedCollectA Megalosaurus. The model portrays it lying in ambush.