sentences:  in 2004 as the most recent common ancestor of "Malawisaurus" and "Saltasaurus" and all the descendants of that ancestor.Lithostrotia is derived from the Ancient Greek , meaning "inlaid with stones", referring to the fact that many known lithostrotians are preserved with osteoderms.However, osteoderms are not a distinguishing feature of the group, as the two noted by Unchurch "et al."