(Ancestor,(Captorhinidae,(Araeoscelidia,(Younginiformes,Rhynchosauria,Prolacertiformes,Trilophosaurus,Choristodera,Archosauriformes,Claudiosaurus,(Odontochelys,(Chelydra,Proganochelys)),(Kuehneosauridae,(Rhynchocephalia,Squamata)),(Helveticosaurus,Thalattosauria,Eusaurosphargis_BES_SC_390,Ichthyopterygia,Atopodentatus,(Anaro_dash_Dactylo,Serpiano_dash_Neustico),((Simosaurus,(Germanosaurus,(Nothosaurus,Lariosaurus))),(Corosaurus,Cymatosaurus)),(Plesiosaurus,Yunguisaurus,(Pistosaurus,Augustasaurus)),(Placodus,Cyamodus,Paraplacodus),(Saurosphargis,Sinosaurosphargis,(Largocephalosaurus_qianensis,Largocephalosaurus_polycarpon)))))));