Seismosaurus

Seismosaurus is a genus of sauropod dinosaur that lived during the Late Jurassic period, approximately 150 million years ago. It is known from a single specimen, which was discovered in the western United States and is now housed in the New Mexico Museum of Natural History and Science. The specimen consists of a partial skeleton, including parts of the skull, vertebrae, and limb bones.

Seismosaurus was a large dinosaur, with estimates of its length ranging from 40 to 70 feet. It was characterized by a long neck and tail, and had a small head relative to its body size. Like other sauropods, it was likely a herbivore, using its long neck and powerful jaw muscles to feed on plants. It may have used its long tail to help balance its body as it moved, and its thick, sturdy limb bones suggest that it was a relatively slow-moving animal. Seismosaurus is known for having one of the longest known tails of any dinosaur, which may have been used for defense or to help it navigate through its environment.