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plesiosaur, (clade Plesiosauria), any of a group of long-necked marine reptiles found as fossils from the Late Triassic Period into the Late Cretaceous Period (215 million to 66 million years ago).
- Is plesiosaur a mammal?
- Is a plesiosaur a dinosaur?
- Are plesiosaurs related to crocodiles?
- How would you describe a plesiosaur?
- Is plesiosaur a herbivore?
- Is a plesiosaur a herbivore or carnivore?
- Why are plesiosaurs not classified as dinosaurs?
- Is a penguin a dinosaur?
- Is lizard a reptile or amphibian?
- What is classed as a dinosaur?
- What does the name plesiosaur mean?
- Is a mosasaurus a dinosaur?
- What does the plesiosaur look like?
- Is a plesiosaur a sauropod?
- What did plesiosaurs do?
Is plesiosaur a mammal?
Like whales, humans, and most other mammals, plesiosaurs—giant, long-necked marine reptiles of dinosaur times—gave birth to live young, a new fossil study suggests.
Is a plesiosaur a dinosaur?
Marine reptiles, such as ichthyosaurs, plesiosaurs and mosasaurs are not dinosaurs. Nor is Dimetrodon or other reptiles in the same group (previously called 'mammal-like reptiles' and now called synapsids).
Are plesiosaurs related to crocodiles?
What the naturalists did not realize was that Plesiosaurus was not an intermediate form between crocodiles and ichthyosaurs, after all, but a unique and starkly different sort of marine reptile. Missing bones were what caused them to miscast their mosnter.
How would you describe a plesiosaur?
any marine reptile of the extinct genus Plesiosaurus, from the Jurassic and Cretaceous periods, having a small head, a long neck, four paddlelike limbs, and a short tail.
Is plesiosaur a herbivore?
Both of these animal's teeth interlock, so plesiosaurs probably ate fish too. Being a meat eater (carnivore) does not necessarily mean an animal was a predator. Stomach contents containing dinosaurs provide evidence that pliosaurs scavenged dinosaur corpses that floated out to sea.
Is a plesiosaur a herbivore or carnivore?
Plesiosaurs were carnivorous and ate fish and other swimming animals. They lived in the large bodies of water and were air-breathing animals.
Why are plesiosaurs not classified as dinosaurs?
Plesiosaurs also went extinct at the end of the Cretaceous epoch. ... Their extinction may simply have been caused by excessive competition with other marine reptiles. Another creature commonly mistaken for a dinosaur is Dimetrodon, with its distinctive "sail" back and sprawling reptilian stance.
Is a penguin a dinosaur?
Penguins are dinosaurs. ... Way back in the Jurassic, birds were just one of many, many dinosaur lineages. Extinction wiped out all the rest, leaving avian dinosaurs the only ones still standing.
Is lizard a reptile or amphibian?
Some examples of reptiles are turtles, snakes, lizards, alligators, and crocodiles. Amphibian An ectothermic vertebrate which lives a double life, metamorphosing from a larval stage to the adult stage. Frogs, toads, salamanders. Autotomy The ability of some lizards to break off their tail to distract predators.
What is classed as a dinosaur?
1 : any of a group (Dinosauria) of extinct, often very large, carnivorous or herbivorous archosaurian reptiles that have the hind limbs extending directly beneath the body and include chiefly terrestrial, bipedal or quadrupedal ornithischians (such as ankylosaurs and stegosaurs) and saurischians (such as sauropods and ...
What does the name plesiosaur mean?
Scientific name: Plesiosaurus, meaning 'close-to lizard'. It was given this name by the scientists William Conybeare and Henry de la Beche to indicate that it was more like a normal reptile than Ichthyosaurus, which had been found in the same fossil bed a few years earlier.
Is a 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.
What does the plesiosaur look like?
Plesiosaurs were large marine reptiles with limbs shaped like flippers, very long necks and relatively small heads. ... Some plesiosaurs had necks longer than their bodies and their shape has often been described as a snake threaded through a turtle. Because of this odd shape, plesiosaurs were quite slow moving.
Is a plesiosaur a sauropod?
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.
What did plesiosaurs do?
All plesiosaurs – so far as we know – were predators, the shapes of their teeth and jaws indicating that they preyed variously on swimming and benthic invertebrates, on fish, and also on other aquatic reptiles.
