Allosaurus is a theropod, or meat-eating dinosaur – a smaller and more ancient relative of the famous Tyrannosaurus rex. It was a specialized predator with a large skull, jaws lined with sharp, serrated teeth, and short yet powerful arms tipped with three large, hooked claws. Allosaurus lived alongside, and probably hunted, some of the largest-known plant-eating dinosaurs, such as Apatosaurus, Diplodocus, Camarasaurus, and Brachiosaurus.
This fearsome predator is a close relative of Tyrannosaurus rex. It lived in what are now the western parts of Canada and the United States, on plains bordering an inland sea east of the rising Rocky Mountains. Albertosaurus was slightly smaller and geologically older than T. rex, and more slender in build. Like its more famous cousin, it had short arms, and each hand had only two fingers.
Large bony plates and smaller studs in the skin of the back and sides characterize the unusual body of Saltasaurus. The “armor” of this elephant-sized sauropod, or long-necked plant-eating dinosaur, probably served for defense against attacks by large predators. Saltasaurus had a thick tail supported by interlocking vertebrae, possibly providing support for the animal as it reared up to feed on tall plants.
Beipiaosaurus is one of the earliest and most primitive known therizinosaurs – a bizarre group of plant-eating dinosaurs that evolved from meat-eating ancestors about halfway through the Age of Dinosaurs. The jaws of Beipiaosaurus held many tiny, leaf-shaped teeth, and were tipped by a toothless beak. The long claws on its hands were probably used for defense from predators, and its body was covered in feather-like filaments.
Discovered in 1995, the massive Giganotosaurus was one of the largest meat-eating land animals that ever lived. It is a member of a group of primitive but gigantic predatory dinosaurs that lived throughout much of the world during the early and middle stages of the Cretaceous Period (the third and final period of the Age of Dinosaurs).
Camarasaurus is very well known from fossils found in the western United States, in a set of rocks called the Morrison Formation. This Late Jurassic sauropod, or long-necked plant-eating dinosaur, had a comparatively large head and sturdy jaws lined with strong, spoon-shaped teeth. It walked with its back and tail held horizontally, and was probably able to raise its head and neck high above its shoulders. http://www.naturalhistorystore.com/
Manchester Museum - meet Stan the T-Rex by purplemattfish on Flickr. "He is a 65 million year old Tyrannosaurus Rex called "Stan" named after Stan Sacrison who discovered him in 1987. This is a resin cast of the bones that I imagine is in a number of museums around the world."