Camarasaurus (supremus, grandis, lentus, lewisi )
Name means: Chambered lizard
Period: Late Jurassic (155-145 MYA)
Length: 75 ft (23 M)
Weight: 47 metric tons
Camarasaurus is one of the most frequently discovered sauropods, the most popular species being lentus, which grew to about 50 ft long. Record of its discovery dates back to 1877 by Oramel W. Lucas. The bones were sold to Edward Drinker Cope who studied and named Camarasaurus in the same year.
The skull of Camarasaurus is notably square-shaped and sturdy. It had 7.5 inch long teeth adept for crushing coarse plants, unlike diplodocid teeth. Camarasaurus had five toes, and one claw on each inner toe. Like most sauropods, Camarasaurus had forelimbs that were shorter than its hindlimbs.
Camarasaurus had a much smaller tail and neck than most sauropods of its size. Its neck also displayed evidence of the existence of air sacs to reduce weight, which provided inspiration for its name.
(Image taken from myjurassicpark.com)