Ultrasaurus

Ultrasaurus is a large sauropod from the Jurassic period that lived in North America. It has recently been discovered to be simply a combination of bones from several different dinosaur species, namely Brachiosaurus and Supersaurus.

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Jurassic Park
Like Psittacosaurus, Ultrasaurus does not appear in any of the three films, but Ultrasaurus can be seen at the beginning of the Jurassic Park: River Adventure at the Universal theme parks. It also had a model of Brachiosaurus too.