Yimenosaurus is otherwise referred as Yimen lizard and this genus belongs to the family of prosauropod dinosaur. It is believed that the species have been lived in the current Woodlands of Asia, about 190 million years ago in early Jurassic period. The first fossil skeleton of the genus was found in the Yimen District of China. This herbivore species comes under the classification of Chordata, sauropsida, dinosauria, saurischia, sauropodomorpha, prosauropoda and melanorosauridae.
The type species was named by Bai, Yang & Wang in 1990. From the fossil skeleton it has been observed that the dinosaur was about 30 feet long and weighed approximately 2 tons. The distinguishing characteristics of the creature include large size; long neck and tail. This kind of genus is very large in size and often characterized by muscular legs and serrated teeth. Some of these dinosaurs were among the largest animals to have ever lived on land.