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Stegosaurus existed from about 155 to 150 million years ago. That was during the Kimmeridgian and Tithonian stages of the Jurassic period. Stegosaurus fossils were discovered in Morrison, Colorado in 1877 by Othniel Charles Marsh.
The Jurassic Period lasted from 201 to 145 million years ago. There are far too many dinosaurs that lived during that time to list, but here are some examples:ApatosaurusDiplodocusBrachiosaurusCamarasaurusAllosaurusTorvosaurusCeratosaurusOrnitholestesStegosaurusScelidosaurusCamptosaurusDryosaurus
Humans, or anything that could be remotely related to humans, came along many millions of years after the Jurassic Period.
The Early Jurassic period saw many changes including the process of Pangaea starting to break apart.
Icthyosaurs lived in the ocean from 245 to 90 million years ago. Too many dinosaurs existed during that period to name them all. The first dinosaurs, such as Eoraptor, evolved around 225 million years ago. During the Jurassic, around 145 million years ago, there were dinosaurs such as Apatosaurus, Diplodocus, Camarasaurus, Stegosaurus, Allosaurus, Torvosaurus, and Ceratosaurus. After that there was Iguanodon, Spinosaurus, and Giganotosaurus.
Apatosaurus lived between 154 and 150 million years ago. This was during the Kimmeridgian and Tithonian stages of the Jurassic period.
As we were not there to count it would be impossible to answer this question.
The remains of about 80 different Stegosaurus have been discovered. They belong to four different species, Stegosaurus armatus, Stegosaurus stenops, Stegosaurus sulcatus, and Stegosaurus longispinus.
Allosaurus lived between 155 and 150 million years ago. This was during the Kimmeridgian and Tithonian stages of the Jurassic period.
Yes, many types of dinosaurs lived in Montana. Dinosaurs from Montana at the end of the Cretaceous include Tyrannosaurus, Triceratops, Edmontosaurus, and others. Dinosaurs that lived there during the late Jurassic include Apatosaurus, Diplodocus, Camarasaurus, Stegosaurus, Allosaurus, Torvosaurus, and Ceratosaurus.
The Jurassic is the second of the three periods of the Mesozoic. It was named for the Jura Mountains, where many of its fossils have been found.
A Stegosaurus had lots of bones then a Human but had 450-750 bones depends how old the Stegosaurus is