Camarasaurus

Camarasaurus Temporal range: Late Jurassic, 155–145 Ma PreЄ Є O S D C P T J K Pg N
Mounted skeletal cast at the Jurassic Museum of Asturias
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Dinosauria
Order:	Saurischia
Suborder:	†Sauropodomorpha
Clade:	†Neosauropoda
Clade:	†Macronaria
Clade:	†Camarasauromorpha
Clade:	†Camarasauridae Cope, 1878
Subfamily:	†Camarasaurinae Cope, 1878
Genus:	†Camarasaurus Cope, 1877a
Type species
†Camarasaurus supremus Cope, 1877a
Species
C. supremus Cope, 1877a C. grandis (Marsh, 1877) C. lentus (Marsh, 1889)
Synonyms
Caulodon Cope, 1877c Morosaurus Marsh, 1878 Uintasaurus Holland, 1924

Camarasaurus (/ˌkæmərəˈsɔːrəs/ KAM-ə-rə-SAWR-əs) was a genus of quadrupedal, herbivorous dinosaurs. It was the most common of the giant sauropods to be found in North America. Its fossil remains have been found in the Morrison Formation of Colorado and Utah, dating to the Late Jurassic epoch (Kimmeridgian to Tithonian stages), between 155 and 145 million years ago.

Camarasaurus presented a distinctive cranial profile of a blunt snout and an arched skull that was remarkably square. It likely travelled in herds, or at least in family groups.

The name means "chambered lizard", referring to the hollow chambers in its vertebrae (Greek καμαρα/kamara meaning "vaulted chamber", or anything with an arched cover, and σαυρος/sauros meaning "lizard").