Megalosaurus bucklandii

The "Original Dinosaur". Megalosaurus was one of the first 4 animals named to be included in Dinosauria, alongside Iguanodon, Hylaeosaurus, and Thecodontosaurus. At the time, Dinosaurs were considered to be large, all quadrupedal relatives of lizards (or lizards themselves). At least some of this assumption came from the teeth of both Megalosaurus and Iguanodon; which resembled those of a monitor lizard and iguana respectively. However, as later material from North America would prove, Dinosaurs were found to be quite different; with many carnivorous forms in particular having very bird-like legs and features. All in all, Megalosaurus was a pretty typical large theropod, and a member of the family Megalosauridae; which it gave its name to. Close relatives include Torvosaurus, Eustreptospondylus, and Duriavenator. The name "Megalosaurus" itself was once used as a "wastebasket" term to encompass many large theropods during the late 19th and early 20th century, though only M. bucklandii remains a valid species today. This predator lived in the coastal woodlands of Middle Jurassic England.