Megalosaurus is a genus of dinosaur belonging to the family Megalosauridae. It lived approximately 166 to 161 million years ago, during the Middle Jurassic period. The first fossils of Megalosaurus were discovered in Oxfordshire, England, in the early 19th century, making it the first scientifically recognized dinosaur.

Megalosaurus was a large carnivorous dinosaur, estimated to have reached lengths of up to 9 meters. It had a powerful, muscular body with strong hind limbs and short forelimbs that ended in sharp claws. Its head was large, featuring a mouth filled with serrated teeth designed for tearing flesh. Megalosaurus walked on its hind limbs, with its tail serving as a counterbalance.

The discovery of Megalosaurus marked a significant milestone in the field of paleontology, as it was the first dinosaur to be scientifically described. It played a crucial role in shaping our understanding of prehistoric life and kick-started the study of dinosaurs. Megalosaurus represents a key branch within the Megalosauridae family, offering insights into the diversity and adaptations of large carnivorous dinosaurs during the Jurassic period.

Megalosaurus is believed to have been an apex predator, employing its strong body, strong jaws, and sharp teeth to overpower its prey. Its hunting strategies likely involved ambushing or pursuing its victims, relying on bursts of speed and a powerful bite to immobilize them. Megalosaurus may have been both a solitary hunter and a scavenger, taking advantage of available food sources in its ecosystem.