(Youngina,(Petrolacosaurus,(Mesosuchus,((Nothosaurus,Pachypleurosaurus_et_Keichousaurus),(Lazarussuchus,(Cteniogenys,(((Khurendukhosaurus_Russian,Khurendukhosaurus_Mongolian,(Shokawa,Hyphalosaurus)),(Monjurosuchus,Philydrosaurus)),(Champsosaurus,(Tchoiria,(Ikechosaurus,Simoedosaurus)))))))))); (Youngina,(Petrolacosaurus,(Mesosuchus,((Nothosaurus,Pachypleurosaurus_et_Keichousaurus),(Lazarussuchus,(Cteniogenys,((Philydrosaurus,(Monjurosuchus,(Khurendukhosaurus_Russian,Khurendukhosaurus_Mongolian,(Shokawa,Hyphalosaurus)))),(Champsosaurus,(Tchoiria,(Ikechosaurus,Simoedosaurus))))))))));