In a message dated 12/4/01 1:47:44 PM EST, qilongia@yahoo.com writes: << In all other features, the skeleton is diagnostically titanosaurid. >> As I recall, the neural spines of the dorsal vertebrae of Opisthocoelicaudia are bifid, which is not the case in any other "titanosaur." (Need to check in Rapetosaurus, though.)