Sellosaurus is a genus of prosauropod dinosaur that lived in Triassic Europe, 225 mya. It was about 23 feet (7 meters) long, 7 feet (2.1 meters) tall and weighed 2,000 pounds (909 kilograms). Like other prosauropods, it had a thumb claw it may have used to defend itself, and reach for food. It physically resembled Plateosaurus, although initially the relationship between these animals was uncertain. A point of contrast between the two genera pertains to the variability in the teeth at the front and back of the jaw. Of the two, Sellosaurus had the highest level of variation.