The Plesiosauria [a] [4] or plesiosaurs are an order or clade of extinct Mesozoic marine reptiles, belonging to the Sauropterygia. Plesiosaurs first appeared in the latest Triassic Period, possibly in the Rhaetian stage, about 203 million years ago. [5]

Plesiosaurus (Greek: πλησίος (plesios), near to + σαῦρος (sauros), lizard) is a genus of extinct, large marine sauropterygian reptile that lived during the Early Jurassic. It is known by nearly complete skeletons from the Lias of England.

Plesiosaur, any of a group of long-necked marine reptiles found as fossils from the late Triassic Period into the late Cretaceous Period. They inhabited marine areas in the Atlantic near Europe and in the Pacific Ocean, including the waters near Australia, North America, and Asia.

Plesiosaurs (Greek: plesios meaning "near" or "close to" and sauros meaning "lizard") were carnivorous, aquatic (mostly marine) reptiles that lived from the Triassic to the Cretaceous periods. They were the largest aquatic animals of their time.

The plesiosaur was not really a dinosaur. The creature was a sauropterygian. Many illustrations depict plesiosaurs attacking land animals, but a plesiosaur’s flippers could not support it on land. The modern loch ness monster myth is always described as a plesiosaurus. What did they eat?

Dec 31, 2023 · Where did Plesiosaurs live? Plesiosaurs lived in the oceans all around the world during the Mesozoic Era, which lasted from approximately 252 million to 66 million years ago. Fossils of Plesiosaurs have been found on every continent, indicating a global distribution.

May 27, 2024 · Plesiosaurs were a group of marine animals that lived between the late Triassic to Cretaceous (about 215 to 66 million years ago), found in various seas worldwide, including the Atlantic and Pacific Oceans.

Aug 13, 2022 · The plesiosaur — an aquatic dinosaur once thought to exclusively reside in saltwater — is now believed to have spent much of its time in freshwater, according to a new study. The discovery is...

The plesiosaurs were an order of large, carnivorous marine reptiles. They flourished from 203 million years ago (mya) to 66 mya. In 1719, William Stukeley described the first partial skeleton of a plesiosaur.

Feb 7, 2019 · As you may already have surmised from its name, Plesiosaurus is the eponymous member of the family of marine reptiles known as plesiosaurs, which were characterized by their sleek bodies, wide flippers, and relatively small heads set at the end of long necks.