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Giraffatitan
''Giraffatitan'', meaning "giant giraffe", is a genus of sauropod dinosaur that lived during the late Jurassic Period (Kimmeridgian-Tithonian stages). It was originally named as an African species of ''Brachiosaurus'' (''B. brancai''). ''Giraffatitan'' is one of the largest animals known to have walked the earth.
==Description==
''Giraffatitan'' was a sauropod, one of a group of four-legged, plant-eating dinosaurs with long necks and tails and relatively small brains. It had a giraffe-like build, with long forelimbs and a very long neck. The skull had a tall arch anterior to the eyes, consisting of the bony nares, a number of other openings, and "spatulate" teeth (resembling chisels). The first toe on its front foot and the first three toes on its hind feet were clawed.
Traditionally, the distinctive high-crested skull has been seen as a characteristic of the genus ''Brachiosaurus'' to which ''Giraffatitan brancai'' was originally referred, but because within the traditional ''Brachiosaurus'' material it is known only from Tanzanian specimens now assigned to ''Giraffatitan'', it is possible that ''Brachiosaurus altithorax'' did not show this feature.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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