Plesiosaurus was a type of plesiosaur that flourished from the late Triassic to the early Jurassic periods, making it an early member of the plesiosaur family. Its body was short and robust, and it swam using its large, oar-like limbs. Gastroliths (stomach stones) found between its ribs are believed to have acted as ballast for buoyancy and adjusting its center of gravity. Its eyes, like those of a ray, were positioned on the upper side of its head, and when its mouth was closed, its sharp upper and lower teeth crossed over each other outside its mouth, consistent with the characteristics of a fish-eating reptile.

English name: Plesiosaurus Origin of name: Resembling a reptile Classification: Order Sauropterygia / Suborder Plesiosauroidea / Family Plesiosauridae Size: 3-5 meters in total length Period of existence: Early Jurassic

Paddle-like Limbs

Its limbs were large and paddle-shaped, suggesting it used them like oars to swim. Did it move its fins in a combination of front, back, up, and down to propel itself?

Not a Dinosaur?

Plesiosaurs and ichthyosaurs, both marine reptiles, are not scientifically classified as dinosaurs. However, they are highly recognized aquatic reptiles that are indispensable when discussing the world of dinosaurs.

Nessie and Plesiosaurus

Nessie, the famous cryptid (unidentified animal), gained notoriety as a plesiosaur trapped in Loch Ness, Scotland. It is a globally known cryptid, and its mystique continues to be told.

Imagine the Size