his suggestion, George Olshevsky changed one letter, and renamed Jensen's sauropod Ultrasauros, with the final "o".

When it was later discovered that the new name referred to bones from two separate, and already known species, the name Ultrasauros was considered invalid and became a junior synonym for Supersaurus. Since the holotype of the Ultrasaurus was a dorsal vertebrae of the Supersaurus, so Ultrasauros is not a junior synonym for Brachiosaurus. The name Supersaurus was kept instead of Ultrasaurus as the animal is a diplodocid and