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Temporal range:
Lower Cretaceous 110–100 mya
Scientific classification
Kingdom: Animalia
Class: Sauropsida
Superorder: Dinosauria
Order: Saurischia
Infraorder: Sauropoda
Genus: Ultrasaurus
Kim, 1983

Ultrasaurus is a genus of sauropod dinosaur. discovered by a South Korea researcher.[1]

The name Ultrasaurus suggests a huge size, but actually it is rather a small sauropod. The researcher thought one of the limb bones was an ulna, an arm bone. So he thought the animal was a large sauropod. Later, it became clear that the bone was a humerus, a thicker arm bone. The bone was not complete, so the mistake was perhaps easy to make. As a result, the animal must have been smaller than previously thought.

The name Ultrasaurus had been used before, to describe some giant dinosaur bones discovered in the United States. These bones are now called Supersaurus.

The genus Ultrasaurus is currently a nomen dubium, a doubtful name, because it is based on too few remains. Not enough is known about the specimen to put it into a specific family of sauropods. It may even be a juvenile of an already known genus or species.

References[change | change source]

  1. Kim, H.M. (1983). "Cretaceous dinosaurs from South Korea." Journal of the Geological Society of Korea, 19(3): 115-126.