|“||Plateosaurus, the first of the giant dinosaurs.||„|
| — Allen, describing Plateosaurus|
in Dawn of the Mesozoic
Plateosaurus (plat-ee-o-saw-us; name meaning "Broad Reptile") is a genus of large prosauropod dinosaur that originated during the Late Triassic period. This creature was an early ancestor of the Jurassic leviathans - the sauropods. It ate plants and was one of the first large dinosaurs to walk the earth.
It was the first and best known of the early giant herbivores. Probably travelling in herds, Plateosaurus was able to move on all fours and could also rear up into a bipedal posture. This animal was a peaceful plant eater that would travel in large herds across continents for food.
Era & DiscoveryEdit
As the first giant dinosaurs, Plateosaurus lived during the Late Triassic Period from 225–208 million years ago. This Triassic dinosaur was first described in 1837 by H. von Meyer. Plateosaurus is known from more than 100 partial to complete skeletons, including 10 skulls. Plateosaurus is the most common and well known European Triassic vertebrate fossil from the Late Triassic.
Being the first of the giant dinosaurs, Plateosaurus was also a very large animal compared to the other types of animals it lived alongside. In fact, they were the largest herbivorous land animals of their time period. Plateosaurus size was the key to their success and these vegetarians, ranging from 15.7–33 feet (4.8–10.1 m) in length and weighing at between 600 kg and 4 tons (8,000 lbs.), four times the weight of a Saltwater crocodile (the largest reptile alive in the 21st century), Plateosaurus were simply to large to be threatened even by Liliensternus and Postosuchus. Plateosaurus was mainly dark green, save for several white stripes along its back and a lighter tint on its underbelly.
Balanced on its long hind legs and reaching up with its long neck, Plateosaurus was able to rear up into a bipedal posture and feed on higher branches of conifers and ferns. It had distinctive hands with small fingers and a large clawed thumb. The hands had effective grasping ability and the claw was possibly used for ripping up roots or tearing at branches.
Behavior & TraitsEdit
Like many herbivores, for the protection of younger individuals, Plateosaurus also lived and traveled in large herds of up to 100 or more individuals. It is hard to believe that these four legged beasts are related to Coelophysis, but these were herbivorous dinosaurs. Rearing up, Plateosaurus was also able to use its long thumb claws for defense against predators such as Postosuchus.
Since these creatures were so large, the adults were nearly indestructible. However, while on their own younger Plateosaurus were prone to be attacked by predators like Liliensternus. Due to them being so large, they would also need to feed on lots of vegetation each day. Their ceaseless search for food would often lead them to foreign areas and continents. Once the area is depleted of a sustainable amount of food, the lumbering herbivores would move to new feeding areas.