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