(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_parvidens,Aristonectes_quiriquinensis,Morturneria_seymourensis,(Kaiwhekea_katiki,Alexandronectes_zelandiensis))),((Callawayasaurus_columbiensis,Mauisaurus_haasti,Tuarangisaurus_keyesi),(Zarafasaurus_oceanis,(Styxosaurus_snowii,Thalassomedon_haningtoni)))))))));