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