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