Sauropterygia

Sauropterygia is an extinct group of marine reptiles that lived during the Triassic and Jurassic periods. These animals had large, flat bodies, paddle-like limbs, and long tails that allowed them to move efficiently through water. Sauropterygians were among the top predators in the ancient seas, and some species were able to reach sizes of over 5 meters in length. They were some of the earliest animals to develop an ability to hear underwater, and their remains are important for understanding the evolution of modern-day reptiles. Sauropterygians are also important to science because they demonstrate the connection between land-dwelling reptiles and marine reptiles. Their bones are found all over the world, and provide valuable insights into the movements of ancient ocean creatures.