The White Terrorsaurus was a monster created from the Evil White Ranger Clone.
Zeltrax uses his evil clone of the White Ranger to create the White Terrorsaurus. The White Terrorsaurus is very powerful and is able to kidnap the Dinozords. It requires the Power Rangers to unlock the Shield of Triumph, and the Red Ranger uses it to become the Triassic Ranger and destroys White Terrorsaurus.
White Terrorsaurus II
The evil clone of the White Ranger creates a new and improved version of his White Terrorsaurus. Elsa uses a crystal that has the same energy as the Dino Gems to feed to him, giving him even more power than before. When Conner, Ethan, Kira, and Trent morph to stop him during an attack on the city, White Terrorsaurus uses his newfound power to absorb the Rangers' powers. Left defenseless, the Rangers continue to challenge the Terrorsaurus, but to no avail. That is until Tommy returns from a coma and morphs into the Black Ranger. The Black Ranger uses Super Dino Mode and his Brachio Staff to destroy the White Terrorsaurus and releases the stolen Ranger powers. The Power Rangers form the Thundersaurus Megazord and with the power of Super Dino Mode are able to find the strength to destroy him for a final time.