There were many animals that coexisted with dinosaurs. There were mutlituberculate and marsupial mammals, such as Ptiloduc, Didelphodon, and Alphadon. There were pterosaurs in the air and relatives of modern crocodiles in freshwater habitats. Some crocodile like animals lived strictly on land at that time. Lizards, frogs, and salamanders lived alongside dinosaurs. And most invertebrate groups that exist today had representatives alive at the time of the dinosaurs.
Gerrothorax is a giant amphibian, not a dinosaur. It lived in freshwater swamps.
By finding out what plants lived in it's environment /the climate of it's habitat.
Many species of dinosaur lived in what is now Maine. They lived there as long as 300 to 400 million years ago.
The fastest dinosaur that ever lived was the cheetah-sized dinosaur called the Compsognathus.
we can't say, because were discovering more all the time. there is actually no such thing as a dinosaur that spent its whole life in water as one of the definitions of a dinosaur is an animal with steady legs that support it on land. any water animal would have flippers so they cant stand. the animals that lived in the water were just animals that lived in the dinosaur period not actual dinosaurs.
Dinosaur dont lived Earth any more, they died.
t-rex
The dinosaur that lived the longest was the Brachiosaurus, which lived around 150 million years ago during the Jurassic period.
Coelophsis was a dinosaur that lived in the Late Triassic Period. The dinosaur is said to have lived in small herds with others.
The dicynodon was an ancient dinosaur which lived in Africa. It is estimated that this dinosaur lived 250?æmillion years ago and lived partially on land and in the water.
Lesothosaurus was a dinosaur that lived in what is now South Africa. It was a 3.3 foot long herbivorous dinosaur.
The fastest dinosaur that ever lived was the cheetah-like dinosaur called the Dromiceiomimus, which could run up to speeds of 60 miles per hour.