About 112 million years ago, in the early Cretaceous, Fort Worth and the land stretching out to the West was home to dinosaurs. Pleurocoelus, a huge four-legged herbivore with a long neck and tail, was about 50 feet long and could weigh 10 tons and more.

Pleurocoelus was well known in Texas for its washtub-sized footprints, visible around Glen Rose, Texas. In 1997, the 75th Texas Legislature named the dinosaur the state dinosaur.

There’s just one problem.

More research and new fossils being discovered by scientists, including professionals from the Fort Worth Museum of Science and History, have discovered that the bones thought to belong to Pleurocoelus really belong to another species of dinosaur, Paluxysaurus jonesi.