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They are both varieties of aquatic reptile predators that went extinct long ago.

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What were some of the unusual features of the ichthyosaurs and the plesiosaurs?

It was herbivorous


What is an archosaurs?

An archosaur is a reptile of the taxon Archosauria, including the extinct dinosaurs, plesiosaurs, pterosaurs and ichthyosaurs, as well as modern crocodiles.


What is an archosaurian?

An archosaurian is an alternative name for an archosaur, a reptile of the taxon Archosauria, including the extinct dinosaurs, plesiosaurs, pterosaurs and ichthyosaurs, as well as modern crocodiles.


What animals live in the Mesozoic?

Animal life was then dominated, by large archosaurian reptiles: dinosaurs, pterosaurs, and aquatic reptiles such as ichthyosaurs, plesiosaurs, and mosasaurs. the first birds and placental mammals also appeared


What type of fossils did Robert Scott discover?

Robert Scott, a British geologist, discovered marine reptile fossils, specifically of ichthyosaurs and plesiosaurs, in the Jurassic rocks of Lyme Regis in England. His discoveries played a significant role in our understanding of prehistoric marine animals.


What do they call dinosaurs that lived in the sea?

No dinosaurs lived in the sea. There were other reptiles that adopted a marine life, but those weren't dinosaurs.


What kind of dinosaur lived in the water?

No dinosaurs specifically lived in the water. Plesiosaurs, pliosaurs, mosasaurs and ichthyosaurs lived in the water (but are not DINOSAURS). They are reptiles but not dinosaurs. They co-inhabited the planet with dinosaurs, in the same way that the pterosaurs ruled the air. Pterosaurs were not dinosaurs either.


What were the dominant organisms living at that time?

During the Jurassic Period, dominant organisms included dinosaurs such as Brachiosaurus, Stegosaurus, and Allosaurus. Other notable organisms included pterosaurs, marine reptiles like ichthyosaurs and plesiosaurs, and early mammals. The flora was dominated by conifers and ferns.


What fossils can be found for the Jurassic period?

Fossils from the Jurassic period include dinosaurs such as Stegosaurus and Allosaurus, marine reptiles like Ichthyosaurs and Plesiosaurs, and early mammals and birds. Plant fossils like ferns, cycads, and conifers are also common from this period.


Is plesiosaurs a common noun?

Yes, the noun 'plesiosaurs' is a common noun, a general word for a type of extinct, marine reptile; a word for any plesiosaurs.


Were they any dinosaurs living in water?

Define dinosaur. Dinosaurs were the dominant vertebrate animals of terrestrial ecosystems. Meaning they only lived in land. The ones that live in water are other reptiles but certainly they are not dinosaurs.There were numerous prehistoric reptiles that were aquatic, such as the ichthyosaurs, plesiosaurs and mosasaurs, that were alive during the time of dinosaurs.


What were the plants and animals in the period of the dinosaurs?

Other animals that lived at the same time as dinosaurs include early mammals and birds, pterosaurs, plesiosaurs, sharks, ichthyosaurs, and mosasaurs. Plants include conifers, cycads, ferns, seed ferns, horsetails, gingkoes, and mosses, and flowering plants came on the scene toward the end of the Mesozoic.