The "Constant.ini" file found within this game's files mention a whole slew of additional dinosaurs not found in the final game, lining up with how the developers mentioned in an interview how they initially planned on including more species beyond the 25 included in the final product:

•Alioramus
•Apatosaurus
•Baryonyx
•Deinonychus
•Diplodocus
•Iquanodon
•Maiasaura
•Ornithomimus
•Panoplosaurus
•Tenontosaurus
•Thescelosaurus
•Wuerhosaurus
•Yangchuanosaurus

Interestingly, out of this batch, the Iquanodon is the only dinosaur to have any more data pertaining to it with its own "Iguan.ini" file, which makes it the only cut species with a known Length (Aprox. 9 Meters Long), Health (500), Life Span (4 Years and 6 Months), and Herd Size (1-15 Individuals). It also had a known attack damage (150), which would have it made it the strongest Ornithopod in the game had it been included.