Below is a list of all the removed animals in the series:
Plateosaurus was going to be in the first episode but the Triassic was scrapped. and became the Cretaceous.Sellosaurus was also going to be in episode 1. It was replaced by Onchopristis.
Cretoxyrhina was a fish that was going to be in a now scrapped episode, Dinos and FishVelociraptor was origially going to be in Planet Dinosaur (excluding the database). it was replaced by Saurornithoides.
Sinosauropteryx originally had a role as a creature. It was then scrapped and put in a database.Niobrarasaurus was an Ankylosaur that was going to be in a now scrapped episode, Dinos and Fish
Aetosaurus was planned but its role was taken by Sarcosuchus.Hesperornis was an theropod that was going to be in a now scrapped episode, Dinos and Fish