(Yunguisaurus,(Pistosaurus_postcranium,Pistosaurus_skull,Augustasaurus,Bobosaurus,(NHMUK_49202,((Stratesaurus,(Macroplata,(Avalonnectes,(Eurycleidus,(Meyerasaurus,(Maresaurus,(R_megacephalus,(Archaeonectrus,(R_cramptoni,(R_zetlandicus,R_thorntoni)))))))))),((Thalassiodracon,((H_longirostris,H_tomistomimus,H_zanoni),(Attenborosaurus,Peloneustes))),(Eoplesiosaurus,(Plesiosaurus,((Eretmosaurus,(Westphaliasaurus,(Seelyosaurus,(Microcleidus_dash_melusinae,(M_tournemirensis,M_brachypterygius,M_homalospondylus))))),(Plesiospterys,Cryptoclidus)))))))));