(Synapsida_slash_Diapsida,(Proganochelys,(Australochelys,(Palaeochersis,((Proterochersis,Megapleurodira),(Kayentachelys,(Mongolochelys,((Kallokibotion,(Pleurosternidae,Baenidae)),(((Xinjiangchelys,(Ordosemys,(Sinemys,(Dracochelys,((Hangaiemys,Judithemys),((Chelydridae,Chelonioidea),(Trionychoidea,Testudinoidea))))))),(Solnhofia,Plesiochelyidae)),(Chubutemys,Otwayemys,(Niolamia,(Meiolania,Ninjemys))))))))))));