(Palaeothyris_acadiana,(((MCSNB_4751,((Drepanosaurus_unguicaudatus,(Megalancosaurus_preonensis,Dolabrosaurus_aquatilis)),(Hypuronector_limnaios,Petrolacosaurus_kansensis))),(Longisquama_insignis,Coelurosauravus)),(Youngina_capensis,(Gephyrosaurus_bridensis,(Mesosuchus_browni,((Prolacerta_broomi,(Macrocnemus_bassanii,Langobardisaurus_pandolfi)),(Proterosuchus_fergusi,(Euparkeria_capensis,(Ornithosuchus_longidens,(Archaeopteryx_lithographica,Sinosauropteryx_prima))))))))));