Wikipedia
Camarasauridae
Camarasauridae is a family of sauropods closely related to Camarasaurus. They are basal Macronarians, forming a sister clade to Titanosauriformes. Some teeth from the Galve formation in Spain are similar to those of Camarasaurus, and may belong to members of this family. Camarasaurids are distinguished by robust teeth, twelve cervical vertebrae, bifid posterior cervical and anterior dorsal neural spines, among other characteristics. Cladistically, they are defined to be all sauropods closer related to Camarasaurus supremus than to Saltasaurus loricatus.