This meat-eating dinosaur dates from roughly 220 million years ago. Coelurosaurichnus was described by paleontologist von Huene in 1941. It was a carnivore that lived during the late Jurassic period , about 156 to 145 million years ago. Its bones were hollow and lightweight, so Coelurus was probably light and fast. Coelurus was named by paleontologist Othniel C. Marsh in 1879.
Many reptiles are ectothermic.
Many dinosaurs may have been cold-blooded. It had a small head, large eyes, and a large body. Coloradisaurus may be the adult version of Mussaurus . A fossil skull was found in Argentina and was named by paleontologist Lambert in 1983 . It was named by J. E. Storer in 1975.