(Hypothetical_outgroup,(Plesiochelyidae,(Xinjiangchelys,(Sinemydidae,(Chelomacryptodira,(Chelydridae,(Toxochelys,(Ctenochelys,(Euclastes,((Puppigerus,Chelonia),((Bouliachelys,(Ocepechelon,(Santanachelys,(Notochelone,(Desmatochelys,(Chelosphargis,Protostega)))))),(Corsochelys,(Mesodermochelys,Dermochelys)))))))))))));