Up until two years ago the clade of Dinosauria was defined as all the descendants of the most recent common ancestor of Triceratops and birds. From Wikipedia:
Under phylogenetic nomenclature, dinosaurs are usually defined as the group consisting of the most recent common ancestor (MRCA) of Triceratops and Neornithes, and all its descendants. It has also been suggested that Dinosauria be defined with respect to the MRCA of Megalosaurus and Iguanodon, because these were two of the three genera cited by Richard Owen when he recognized the Dinosauria.
However, after the resurrection of the clade Ornithoscelida by Baron et al in 2017 (see here), as the clade consisting Ornithschia and Theropoda, the MRCA of Triceratops and birds is defining Ornithoscelida and not the whole Dinosauria, assuming we still define Sauropodomorphs as dinosaurs.
So if dinosaurs include Sauropodomorpha, Herrerasaurs, Ornithoschia and Theropoda, what is the most updated phylogenetic definition of the clade Dinosauria?