What does the name plesiosaurus mean?
The Plesiosauria (/ˌpliːsiəˈsɔːriə, -zi-/; Greek: πλησίος, plesios, meaning “near to” and sauros, meaning “lizard”) or plesiosaurs are an order or clade of extinct Mesozoic marine reptiles, belonging to the Sauropterygia.
Were there freshwater plesiosaurs?
Plesiosaurs are one of the common groups of aquatic reptiles in the Mesozoic, which mainly lived in marine environments. Freshwater plesiosaurs are rare in the world, especially from the Jurassic.
What is a plesiosaurus dinosaur?
Plesiosaurus (Greek: πλησίος (plesios), near to + σαῦρος (sauros), lizard) is a genus of extinct, large marine sauropterygian reptile that lived during the early part of the Jurassic Period, and is known by nearly complete skeletons from the Lias of England.
What happened to the plesiosaurus?
Finally extinct Plesiosaurs thrived during the Jurassic and Cretaceous. Some evolved into the short-necked, large-headed pliosaurs, such as the enormous Predator X. They died out 66 million years ago, along with the dinosaurs.
Is plesiosaurus a dinosaur?
Plesiosaurus was a plesiosaur, a type of marine reptile. It was not a dinosaur, though it coexisted with many dinosaurs. The first Plesiosaurus fossil was discovered in 1821. Plesiosaurus was an aquatic reptile of the Jurassic period.
Is the mosasaurus a dinosaur?
These apex predators of the prehistoric deep can feast on all manner of ocean life. Their double-hinged jaws open wide for any prey including Plesiosaurs and great white sharks. They are not actually dinosaurs, but in fact marine reptiles.
Why are plesiosaurs not dinosaurs?
When dinosaurs ruled on land, these reptiles prowled the seas. Plesiosaurs inhabited the seas from around 200 million to 65 million years ago. They were not dinosaurs, despite living at the same time as dinos. It is thought that plesiosaurs fed mainly on fish, breathed air and laid their eggs on beaches.
Is there a dinosaur that swims in water?
Spinosaurus is the only dinosaur we know that spent time living in the water. Another dinosaur, Ceratosaurus, could probably swim and catch aquatic prey, such as fish and crocodiles.
What was the lifespan of a plesiosaur?
The order Plesiosauria was comprised of two superfamilies, Plesiosauroidea and Pliosauroidea….Plesiosaur.
|Average Size||1.8-20 m|
|Average weight||75 kg-30 t|
What is the largest sea dinosaur?
Currie Dinosaur Museum. One of the biggest specimens ever found was identified as Mosasaurus hoffmanni and was estimated to be about 56 feet (17 meters) long in life, according to a 2014 study published in the journal Proceedings of the Zoological Institute RAS. Not all mosasaurs were giants though.
Are Mosasaurus Still Alive 2020?
Mosasaurs (from Latin Mosa meaning the ‘Meuse’, and Greek σαύρος sauros meaning ‘lizard’) comprise a group of extinct, large marine reptiles from the Late Cretaceous. They became extinct as a result of the K-Pg event at the end of the Cretaceous period, about 66 million years ago.