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Brachiosaurus in Yuri's Revenge
Brachiosaurus /ˌbrækiəˈsɔrəs/ is a genus of sauropod dinosaur from the Jurassic Morrison Formation of North America. It was first described by Elmer S. Riggs in 1903 from fossils found in the Grand River Canyon (now Colorado River) of western Colorado, in the United States. Riggs named the dinosaur Brachiosaurus altithorax, declaring it "the largest known dinosaur". Brachiosaurus had a proportionally long neck, small skull, and large overall size, all of which are typical for sauropods. However, the proportions of Brachiosaurus are unlike most sauropods - the forelimbs were longer than the hindlimbs, which resulted in a steeply inclined trunk. Also, while the tail is a typical long dinosaur tail, it was relatively short for a sauropod.