As with Late Cretaceous North America-ifying the series, I don't think I need to elaborate here - everything here is either from the Morrison Formation, the Sundance Sea, the Tendaguru Formation in a couple instances or nonspecific. Just about entirely objectively false, I originally wanted to just do the first movie.
Not everything from the first movie can be reassigned to a fitting Late Jurassic counterpart!
Dimetrodon died out over a hundred million years before the Jurassic
Pachycephalosaurs only appeared in the Late Cretaceous!
There weren't any hadrosaurs in the Jurassic period; they appeared in the Cretaceous
As with the pachycephalosaurs, there were no ceratopsid ceratopsians until the Late Cretaceous; the only described ceratopsians (and the only marginocephalians) around in the Jurassic were very small and lived in China