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Ultrasauros: Dinosaur Quick Facts


Ultrasauros is one of the tallest and largest dinosaurs found to date, but may actually be a cross-breed of two separate dinosaurs: Brachiosaurus and Supersaurus. Both of these dinosaurs were enormous, four-legged, plant-eating dinosaurs with a long neck and long tail. Brachiosaurus had a giraffe-like neck held high, a sloping back, a tiny head, and a medium-length tail. Supersaurus was a dipodocid sauropod with a whip-like tail and a head held close to the ground.

The Name Ultrasauros

Meaning – Ultrasauros means “ultra lizard”
Named By – Jensen/Olshevsky
When Named – 1991

What Did the Ultrasauros Eat?

Ultrasauros probably ate the tops of tall trees with its large spatulate teeth. It swallowed its food whole, without chewing it, digesting the plant material in its gut.

How Big Was the Ultrasauros?

Length was 82-100 feet long
Height was 50+ feet tall at the hips
Weight was 55 to 130 tons

When Did the Ultrasauros Live?

The Ultrasauros lived during the late Jurassic period.

Where have fossils from the Ultrasauros been found?

Just a few bones of  Ultrasauros were found in the Upper Jurassic Morrison Formation in western Colorado, USA, in 1979, by U.S. paleontologist James A. Jensen.

A shoulder blade, some vertebrae, and a partial hip have been found. These fossils are probably bits of a huge Brachiosaurus and a Supersaurus.

What is the Classification of the Ultrasauros?

Kingdom Animalia
Phylum Chordata
Class Archosauria
Order Saurischia
Suborder Sauropoda
Family Brachiosauridae
Genus Ultrasauros
Species U. Machintoshi