Ultrasaurus

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

Ultrasaurus is a doubtful name (nomen dubium). Not enough is known about the specimen to put it into a specific family of sauropods. It may even be a member of a known genus or species, which would make the name Ultrasaurus a junior synonym as well. It is only known from part of an upper forearm (humerus), and some back bones (vertebrae).