For this mod to work you need the Claire's Sanctuary DLC.

With this mod you'll be able to give the Ouranosaurus a more accurate look; from longer tail and neck to a more accurate head and sail closer to its fossil counterpart.

A full list of the changes:
-Elongated the head to make it more in line with fossil evidence
-adjusted the beak curvature
-added bump on the head, reflecting fossil evidence
-depressed the temporal surface of the skull
-made the neck sligthly longer (longer than that provokes problems in the animations)
-adjusted muscle in the lower neck to avoid the feeling of the animal being ripped (stemothyrohyoid muscle)
-adjusted muscle in the upper neck to make it curve better (transversospinalis capitis muscle)
-completely remade the sail to share the same shape as seen in the fossil record
-partially thinned out the sail, leaving space for muscle anchoring
-adjusted the hip bone to make it slightly more visible (Ilium)
-elongated the tail to reflect the fossil record
-adjusted the tail muscles to thin out the second half of the tail (Illio-ischiocaudalis muscle)

Before installing ALWAYS REMEMBER TO BACKUP THE ORIGINAL FILES!

To install:
-go into your game directory
-copy the files into "Jurassic World Evolution\Win64\ovldata\ContentPDLC4\Dinosaurs\Ouranosaurus"
-overwrite all
-enjoy!

To uninstall:
simply copy and paste in the same directory the original files :)