Pliosaurs were the short-necked version of plesiosaurs.
Pliosaur Scientific Classification
Pliosaur Physical Characteristics
Up to 100,000 lbs (45 tonnes)
Pliosaur Distribition

The pliosaurs were a team of marine reptiles that resided in the Mesozoic period (251- 66 million years ago). The Mesozoic period consists of the Triassic, Jurassic, and Cretaceous durations. They were the significant fossil highlights of the Jurassic and Cretaceous durations. The pliosaurs belong to the plesiosaurs, one more well- well-known team of aquatic reptiles. The size of their neck and basic physique was the primary distinction in between the pliosaurs and their very closely relevant relatives, both participants of the order Plesiosauria.

Summary and Dimension

The name Pliosaur (additionally called Pliosaurus) is from 2 Greek words, ” pleion” and ” sauros,” which imply “even more” and “saurian.” The name has a fascinating beginning, more referencing their partnership with the various other plesiosaur reptiles. Plesiosaurus was found prior to pliosaurs; when pliosaurs were later on located, researchers discovered the resemblances in between these animals (pliosaurs and plesiosaurs) and considered them participants of the very same family. This caused the name “ much more saurian.” The researchers that designated the name to this team thought they were the web link in between the Plesiosauroids and Crocodilians that followed them.

Pliosaurs and plesiosaurs are typically incorrect for every various other generally due to the resemblances in their name and their appearance. Both animals additionally lived around the very same time. Nonetheless, while plesiosaurs had lengthy necks, pliosaurs had brief necks. Additionally, despite the fact that both animals had 4 fins, the fore fins of the pliosaurs were smaller sized than the back fins. The reverse held true with the plesiosaurs.

Pliosaurs lived around 66 million years earlier.

– Permit

Pliosaurs differed significantly in dimension from one person to the various other. The biggest well-known species in this team were the Kronosaurus and Pliosaurus macromerus The Kronosaurus expanded to sizes of approximately 40 feet (12 m), with the head alone occupying to 12.1 feet of their overall size. A freshly found however unrevealed species (nicknamed Killer X) expanded to concerning 50 feet and may have considered approximately 45 tonnes (nearly 100,000 extra pounds).

Their lengthened heads included long, solid jaws with sharp cone-shaped teeth. They had effective jaws which might create a bite pressure of approximately 33,000 extra pounds. Although they lived undersea, this aquatic reptile did not have gills. Rather, they had lungs for breathing and needed to emerge sometimes for air.

Diet – What Did Pliosaurs Eat?

Pliosaurs were meat-eating reptiles. They were peak predators and might have taken advantage of practically any kind of animal in their environment, little sufficient for them to handle. They had lengthy and effective jaws with lots of sharp, cone-shaped teeth. Considering that they resided in the water, their primary victim consisted of sharks, fishes, dinosaurs, ichthyosaurs, and plesiosaurs.

Environment – When and Where Did Pliosaurs Live?

Pliosaurs lived from the very early Jurassic Duration of the Mesozoic Period till the very early or Mid- Cretaceous duration, approximately 66 million years earlier. This implies they were around for approximately 120 million years, controling the marine environments of the Mesozoic period.

Pliosaurs had a large range of environments as their fossils have actually been located near open seas, estuarine waters, and also fresh water environments. They were additionally located throughout various places, consisting of Africa, Australia, Europe, China, South America, The United States And Canada, England, and France. This recommends they had a prevalent distribution all around the world.

Hazards and Predators

Pliosaurs were amongst the biggest predators of their time, and just a couple of bigger predators might take them down. They were the leading aquatic reptiles till the mosasaurs went along. These brand-new predators were even more ferocious and were additionally much more dexterous. While they most likely really did not assault the pliosaurs, they became their significant rivals, at some point displacing them.

Discover and Fossils – Where Pliosaurs were Discovered

Pliosaurs were initial found in the 19th century by Richard Owen, that was additionally the researcher that called them. Plesiosaur fossils had actually been located previously, so the correct classification for the freshly found Pliosaurs frustrated researchers for some time. Fossils of these reptiles have actually been located on nearly all continents with rather total components. In 2006, among the biggest pliosaur fossils was found on the Arctic island of Svalbard in Norway. This is the biggest fossil of this reptile located to day.

Termination– When Did Pliosaurs Pass away Out?

Pliosaurs slowly ended up being extinct in the Very early Cretaceous duration, concerning 66 million years earlier. Their termination was partly as a result of their competitors with the mosasaurs, which were even more dexterous and much better adjusted. Some professionals believe the pliosaurs went away due to the fact that the Mosasaurs outcompeted them. This recommends they were not about when the Cretaceous- Paleogene termination occasion took place. This around the world termination occasion exterminated 3- quarters of life in the world at the time, consisting of the pliosaurs, if they still existed at the time.

Similar Animals to Pliosaurs

  • Plesiosaurus – This is a genus of extinct, large aquatic reptiles that lived throughout the Very early Jurassic Duration. The order Plesiosauria, more separated right into plesiosaurs and pliosaurs, was called hereafter large lengthy- necked reptile.
  • Dolichorhynchops – Dolichorhynchops resided in The United States and Canada throughout the Late Cretaceous. Participants of this genus are understood for their particular lengthy- nosed faces.
  • Elasmosauridae – This is an extinct family of plesiosaurs that lived throughout the Late Cretaceous. Elasmosaurs had the lengthiest necks of all the Plesiosaurs to have actually ever before existed.


  1. Britannica, Available here:
  2. Wikipedia, Available here:
  3. Thought Co., Available here:
  4. Australian Museum, Available here:

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