(Plesiosaurus_dolichodeirus,(Thalassiodracon_hawkinsi,(Microcleidus_tournemirensis,((Muraenosaurus_leedsi,(Cryptoclidus_eurymerus,(Kimmerosaurus_langhami,(Tatenectes_laramiensis,(Tricleidus_seeleyi,(Polycotylus_latipinnis,(Edgarosaurus_muddi,(Dolichorhynchops_osborni,Trinacromerum_bentonianum)))))))),(Brancasaurus_brancai,((Futabasaurus_suzukii,((Aristonectes_quiriquinensis,(Aristonectes_parvidens,Morturneria_seymourensis)),(Kaiwhekea_katiki,Alexandronectes_zelandiensis))),((Callawayasaurus_columbiensis,(Mauisaurus_haasti,Tuarangisaurus_keyesi)),(Zarafasaurus_oceanis,(Styxosaurus_snowii,Thalassomedon_haningtoni)))))))));