Tha e cuideachd air a mholadh gum bi Dinosauria air a mhìneachadh a thaobh MRCA de Megalosaurus agus Iguanodon, oir bha iad sin nan dà de na trì ginealaichean a chaidh ainmeachadh le Richard Owen nuair a dh 'aithnich e an Dinosauria. Tha an dà mhìneachadh a' toirt a-steach an aon sheata de bheathaichean a tha air an mìneachadh mar dinosaurs: "Dinosauria = Ornithischia + Saurischia", a 'toirt a-steach ankylopoposaurians (armored herbivorous quadrupod), stegoposaurians (plated herbivorous quadrupod), ceratopsians (herbivorous quadrupod le horns agus frithpeds), no frithpeds (frithpeds), no frithpeds (frithpeds), no frithpeds.
sinnsear cumanta as ùire (MRCA) Triceratops agus Neornithes, agus a shliochd uile