Therizinosaurus - It could grow up to 10-12 meters long and reach 3-6 tons in weight. Lived in the late Cretaceous, and was one of the last and largest representatives of its unique group, the Therizinosauria. It is known only from a few bones, including gigantic hand claws, from which it gets its name. The claws on its forearms could reach a meter in length, and could be used to fight off predators and grab its food.Dietary Type/Herbivore-Omnivore-Origin/Mongolia-Family/Therizinosauroidae
Spinosaurus - was the biggest of all the carnivorous dinosaurs, larger than Tyrannosaurus and Giganotosaurus. It lived during part of the Cretaceous period, about 112 million to 97 million years ago, roaming the swamps of North Africa. Spinosaurus means "spine lizard," an appropriate descriptor, as the dinosaur had very long spines growing on its back to form what is referred to as a "sail."Dietary type/Carnivore-Family/Spinosauridae-Origin/North Africa
L is for Leaellynasaura Leaellynasaura amicagraphica was a basal ornithopod dinosaur from the Early Cretaceous of Victoria, Australia, about 110 million years ago. It was fairly small, probably reaching around 1m (3'3") in length. It was essentially a huge tail with a dinosaur attached to one end. Its tail contained over 70 vertebrae, and was three times longer than the rest of the body. During the Early Cretaceous Australia was connected to Antarctica, and Victoria would have been w...
Pending further discoveries, Spinosaurus was the world's largest carnivorous dinosaur. Full-grown adults outweighed Tyrannosaurus Rex by about a ton and Giganotosaurus by about half a ton. Since so few Spinosaurus fossils are extant, it's possible that other individuals were even larger.