Plesiosauria Plesiosauria The Plesiosauria (; Greek: πλησίος, "plesios", meaning "near to" and "sauros", meaning "lizard") or plesiosaurs are an order or clade of Mesozoic marine reptiles (marine Sauropsida), belonging to the Sauropterygia. Plesiosaurs first appeared in the latest Triassic Period, possibly in the Rhaetian stage, about 203 million years ago. They became especially common during the Jurassic Period, thriving until their disappearance due to the Cretaceous–Paleogene extinction event at the end of the Cretaceous Period, about 66 million years ago. They had a worldwide oceanic distribution. Plesiosaurs were among the first fossil reptiles discovered. In the beginning of the nineteenth century,
The Magic School Bus (video game series) has to find replacements. There are seven different places, including "Jurassic Colorado" and "Triassic Argentina". The difference from the book (The Magic School Bus: In the Time of the Dinosaurs) and the TV episode (The Magic School Bus: The Busasaurus) is that the Bus transforms into three different prehistoric animals; which is Coelophysis (for the Triassic Period), Stegosaurus (for the Jurassic Period), and Pteranodon (for the Cretaceous Period). This game has very elaborate CGI forms for the bus. Although the classroom location song has changed in the following games, the game's classroom location song is the same as "The Magic