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meaning: "heavy lizard"
Named By: Othniel Charles Marsh in 1890
Time Period: Late Jurassic, 152-150 Ma
Location: USA, including the states of Colorado, Oklahoma, South Dakota, Utah and Wyoming - Morrison Formation
Size: Up to about 27.5 meters long (based upon ROM 3670)
Diet: Herbivore
Fossil(s): Partial post cranial remains of several individuals
Classification: | Chordata | Reptilia | Dinosauria | Saurischia | Sauropodomorpha | Sauropoda | Diplodocidae | Diplodocinae |
Also known as: | Barosaurus affinis |

Barosaurus ( BARR-o-SAWR-as) was a giant, long-tailed, long-necked, plant-eating dinosaur closely related to the more familiar Diplodocus. Remains have been found in the Morrison Formation from the Upper Jurassic Period of Utah and South Dakota (and possibly Africa, as exemplified by the Kadsi Formation). It is present in stratigraphic zones 2-5.

The composite term Barosaurus comes from the Greek words barys (barus) meaning "heavy" and sauros (sauros) meaning "lizard"; thus "heavy lizard".

Read more about Barosaurus at Wikipedia
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