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