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Brachiosaur, (genus Brachiosaurus), any member or relative of the dinosaur genus Brachiosaurus, which lived 150 million to 130 million years ago from the Late Jurassic to the Early Cretaceous Period. Brachiosaurs were the heaviest and tallest sauropod dinosaurs for which complete skeletons exist;. Brachiosaurus humerus bone In 1903, Elmer Samuel Riggs described and named Brachiosaurus. In 1904, he created a new sauropod family, the Brachiosauridae. [1][9] He published a complete description of the phenotype after examining the humerus, femur, coracoid and sacrum of the Brachiosaurus holotype that had been prepared at the Field Columbian Museum. [1] Since then, the classification of.

The sauropod dinosaur Brachiosaurus earned its name from the fact that the arms,‭ ‬or rather the fore legs as it was quadrupedal,‭ ‬are actually longer. A dinosaur the size of a four-story building slowly approaches a coniferous tree in what's now North America. Stretching up its long neck, the creature rips off pine needles and leaves that few other dinos can reach. This huge plant-eater is Brachiosaurus, and it's one of the biggest animals that's ever walked the planet. Huge herbivore Roaming Earth between 156 and 145 million years ago.