Board Thread:General Discussion/@comment-26237273-20150617140442/@comment-17754282-20150619172355

If memory serves, Grey says that when Jurassic World first opened there were eight species. By the time of the film there are more - he either says that there are twenty or that there are more than twenty.

Presumably at least some of those eight original species were ones seen in the first film - we know Rexy is one of them. I assume some of the others were Gallimimus, Triceratops and Parasaurolophus. Brachiosaurus may well have been there too.

I think that during the course of the film, Dilophosaurus is also confirmed to be in the park somewhere, even if they weren't listed on the map. Not only does it appear as a hologram, during the information video that plays on the gyrosphere mention is made of the gyropsphere's protection from Dilophosaurus Spit, suggesting that Dilophosaurus must be in the park somewhere and is presumably viewable at some point during the gyrosphere tour.

Now, the map that was shown in pre-release material only names sixteen species - Ankylosaurus, Apatosaurus, Baryonyx, Dimorphodon, Edmontosaurus, Gallimimus, Metriacanthosaurus, Microceratus, Mosasaurus, Pachycephalosaurus, Parasaurolophus, Pteranodon, Stegosaurus, Suchomimus, Triceratops and Tyrannosaurus. Adding in Dilophosaurus and Velociraptor brings this number up to eighteen.

Then we have the holoscape screen in the Innovation Centre, which controls the holograms. Throughout the film this device shows off several dinosaurs in the park, including Apatosaurus, Parasaurolophus, Ankylosaurus, Gallimimus, Velociraptor and Dilophosaurus. However the screen also shows ten dinosaurs not listed anywhere else as being associated with Jurassic World. These are - Allosaurus, Brachiosaurus, Deinonychus, Elaphrosaurus, Hadrosaurus, Hoplitosaurus, Lesothosaurus, Nipponosaurus, Plesiosaurus and Spinosaurus. This brings the possible total up to twenty-eight.

However, of those ten, only Brachiosaurus has anything else to indicate its presence within the Jurassic World park. First it was in the original park so unless they all died out, they should still be there somewhere. Second there is the revealed "Treetop Grazers" attraction which was schedueled to open in 2018, presumably being the next "big thing" for the park after Indominus went public. Brachiosaurus is the animal shown to live in this attraction and as it would need to be opened with fully grown animals in order for it to work, the Brachiosaurus is likely to be alive already somewhere within the park during the events of the film.

And then we have Indominus, bringing the possibly total number of prehistoric species up to twenty-nine.