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brachiosauridae
Brachiosauridae is a family of sauropod dinosaurs belonging to Titanosauriformes. They were herbivorous quadrupeds with longer forelegs than hind legs, the name derives from the Greek for ''arm lizard'' - and long necks. Despite their apparently distinctive features, there is some dispute as to whether Brachiosauridae is really a distinct family or a collection of basal Titanosauriformes. As a result, there is also some dispute about which animals belong within this family.
==Description==
Some members of this clade are among the largest known dinosaurs and one of them (''Brachiosaurus'') was once thought to be the largest land animal ever to live. Brachiosaurids had unusually long and upright necks that gave them access to the leaves of treetops that would have been inaccessible to other sauropods. Their long and spatulate (spoon-shaped) teeth were capable of processing tougher plant material than some other sauropods (such as ''Diplodocus'').
Brachiosaurids first appear in the fossil record in the Late Jurassic (Kimmeridgian-Tithonian); they disappeared in the late Early Cretaceous. Brachiosaurid fossils were first found in North America in the early 20th century, and it is now known that the dinosaurs that left these fossil remains found suitable habitats in Africa, Europe, South America〔Rauhut, O. W. (2006). (A brachiosaurid sauropod from the late Jurassic Cañadón Calcáreo Formation of Chubut, Argentina ). ''Fossil Record'', 9(2), 226-237.〕 and probably Asia.
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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