摘要
Known as the 'true terrestrial tetrapod,' reptiles mainly live on land. However, some reptile groups made a secondary adaptation to their life in water. Generally called 'marine reptiles,'
Known as the ＂true terrestrial tetrapod,＂ reptiles mainly .live on land. However, some reptile groups made a secondary adaptation to their life in water. Generally called ＂marine reptiles,＂ they are mostly extinct, and their fossils are found in Mesozoic marine deposits around the world. Ichthyosaurs and Plesiosaurs are the most famous marine reptiles that lived in the ＂dinosaur age,＂ namely the Jurassic and Cretaceous. Many more ＂sea monsters＂ were ruling the ocean in the Triassic period, when dinosaurs had just arisen from its archosaur ancestors.
