Jensen, who described the original "Supersaurus" specimen, simultaneously reported the discovery of another gigantic sauropod, which would later be named "Ultrasaurus" "macintoshi" (later renamed Ultrasauros macintoshi). The type specimen (the specimen used to define a new species) of "Ultrasauros", being a backbone (dorsal vertebra, labeled BYU 9044), was later found to have come from "Supersaurus". In fact, it probably belonged to the original "Supersaurus" specimen, which was discovered in the same quarry in 1972. Therefore, "Ultrasauros" became a junior objective synonym of "Supersaurus", which had been named first and thus retains priority, and the name "Ultrasauros" was abandoned.