出典:Wikipedia
出典:『Wikipedia』 (2011/06/08 22:28 UTC 版)
Eobrontosaurus (meaning "dawn thunder lizard") is the name given to a genus of dinosaur from the Late Jurassic of North America. It was a sauropod probably closely related to Apatosaurus. It is known from a single site from the lower Morrison Formation, dating to about 154 million years ago. It grew up to 21 metres (69 ft) long.