Cetiosaurus

Cetiosaurus was the first true sauropod. Cetiosaurus was not related to camarasaurus.

Cetiosaurus was a long-necked quadrupedal animal approximately 18 meters (59 ft) long. Its neck was as long as its body, and the tail was considerably longer, consisting of at least 40 caudal vertebrae. Its dorsal vertebrae, the bones along the back, were heavy and primitive, unlike the hollowed-out bones of advanced sauropods like Brachiosaurus. Its forearm, too, was as long as the upper arm, unlike most other sauropods. Its thigh bone was approximately six feet in length.