(Simosaurus,(Cymatosaurus,(Pistosauridae,((Plesiosaurus,((Microcleidus,(Brancasaurus,(Calawayasaurus,(Libonectes,Styxosaurus)))),((Cryptoclidus,Muraenosaurus),(Tricleidus,(((Dolichorhynchops,Trinacromerum),(MOR_751,Polycotylus)),(Kimmerosaurus,Morturneria)))))),(Thalassiodracon,(Eurycleidus,(Attenborosaurus,(((BMNH_R_dot_5488,(Rhomaleosaurus_zetlandicus,(Leptocleidus,Simolestes))),(Rhomaleosaurus_megacephalus,Rhomaleosaurus_victor)),(Macroplata,(Hauffiosaurus,(Kronosaurus,(Peloneustes,(Liopleurodon,(Brachauchenius,Pliosaurus))))))))))))));