Pronounced - ul-tra-SAWR-os Named By - Jensen/Olshevsky When Named - 1991 Status - Ultrasauros is a dubious genus; its fossils are probably the remains of two different genera of huge plant-eating dinosaurs (Brachiosaurus and Supersaurus).
DIET:	Herbivore (plant-eater). Ultrasauros probably ate the tops of tall trees with its large spatulate (chisel-shaped) teeth. It swallowed its food whole, without chewing it, digesting the plant material in its gut.
SIZE:	Length - 82-100 feet long (25-30 m) long Height - 50+ feet (16+ m) tall at the hips Weight - 55 to 130 tons
WHEN IT LIVED:	Late Jurassic period
WHERE IT LIVED:	Fossils have been found in Colorado, USA, North America.
FOSSILS:	Just a few bones of "Ultrasauros" were found in the Upper Jurassic Morrison Formation in western Colorado, USA, in 1979, by US paleontologist James A. Jensen. A shoulder blade (scapula), some vertebrae, and a partial hip have been found. These fossils are probably bits of a huge Brachiosaurus (the enormous shoulder bone) and a Supersaurus (the vertebrae).
CLASSIFICATION:	Kingdom Animalia (animals) Phylum Chordata (having a hollow nerve chord ending in a brain) Class Archosauria (diapsids with socket-set teeth, etc.) Order Saurischia - lizard-hipped dinosaurs Suborder Sauropoda - large herbivores Family Brachiosauridae - giraffe-stanced sauropods (with arms longer than legs) Genus Ultrasauros Species U. machintoshi (type species named by Jensen/Olshevsky, 1991)
INTERESTING FACTS:	Ultrasauros is a dubious genus of dinosaur. Its fossils are probably the remains of two different genera of huge plant-eating dinosaurs (Brachiosaurus and Supersaurus).
LINKS:	A detailed page on Ultrasauros. Ultrasauros Printout K-3 Ultrasauros Printout