Dec 9, 2018

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Samaj kalyan nirikshak exam paper download here

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Brachiosaurus (/ˌbrækiəˈsɔːrəs/) is a genus of sauropod dinosaur that lived in North America during the Late Jurassic, about 154–153 million years ago. It was first described by American paleontologist Elmer S. Riggs in 1903 from fossils found in the Colorado Rivervalley in western Colorado, United States. Riggs named the dinosaur Brachiosaurus altithorax; the generic name is Greek for "arm lizard", in reference to its proportionately long arms, and the specific name means "deep chest". Brachiosaurus is estimated to have been between 18 and 21 meters (59 and 69 ft) long; weight estimates range from 28.3 to 58 metric tons (31.2 and 64 short tons). It had a disproportionately long neck, small skull, and large overall size, all of which are typical for sauropods. Atypically, Brachiosaurus had longer forelimbs than hindlimbs, which resulted in a steeply inclined trunk, and a proportionally shorter tail.
Brachiosaurus
Temporal range: Late Jurassic154–153 Ma 
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Brachiosaurus mount.jpg
Reconstructed replica of the holotype skeleton outside the Field Museum of Natural History
Scientific classificationedit
Kingdom:Animalia
Phylum:Chordata
Clade:Dinosauria
Order:Saurischia
Suborder:Sauropodomorpha
Clade:Sauropoda
Family:Brachiosauridae
Genus:Brachiosaurus
Riggs1903[1]
Species:
B. altithorax

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