(Seymouriidae,(Synapsida,(Parareptilia,(Captorhinidae,(Araeoscelidia,(Apsisaurus,(Younginiformes,(Claudiosaurus,(((Sophineta,((Rhynchocephalia,(Squamata,Megachirella_wachtleri)),(Choristodera,Kuehneosauridae))),(Palaeagama,Saurosternon)),(Coelurosauravus,((Drepanosauridae,(Tanystropheus,(Macrocnemus,(Prolacerta,(Archosauriformes,(Trilophosaurus,Rhynchosauria)))))),((Ichthyopterygia,(Hupehsuchus,((Placodus,(Pachypleurosaurs,(Simosaurus,Pistosauridae))),(Testudines,Helveticosaurus)))),(Askeptosaurus,(Clarazia,Thalattosaurus))))))))))))));