(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))),(Czatkowiella,Protorosaurus))))))))); (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))),(Czatkowiella,Protorosaurus)))))))));