Siamotyrannus was a tyrannosaur from early Cretaceous Thailand. It was 23 feet long and 1-1.5 tons. It was fairly fast, and also heavy. It was built in the middle to be a good runner and yet not to light to be fragile. It lived in the only place where Spinosaurs and Tyrannosaurs lived with each other. Siamotyrannus and Siamosaurus probably had to compete for food. It was large and probably had a bite force of around 1300-1500 lbs per square inch allowing it to take one bite of a herbivore and cause a lot of, if not fatal, damage.