In a message dated 96-01-26 09:33:13 EST, Thomas_R_HOLTZ@umail.umd.edu (th81) writes: >Titanosauria + Opisthocoelicaudia is Titanosauroidea, by the way. This clade will wind up including most of the advanced sauropods, unless Upchurch is right about _Opisthocoelicaudia_ and its relationship to Titanosauridae.