 Initially, the film's new dinosaur was known as "Malusaurus".In Jaffa's and Silver's draft, the new dinosaur—a non-existent species—was depicted as a real animal.Trevorrow made the dinosaur a genetically modified hybrid named "Indominus rex" to maintain consistency with earlier films in the series, which had incorporated the latest paleontological discoveries; he said, "I didn't wanna make up a new dinosaur and tell kids it was real".