(Yunguisaurus_liae,(Pistosaurus_skull,(Pistosaurus_postcranium,(Augustasaurus_hagdorni,(Bobosaurus_forojuliensis,((Anningasaura_lymense,(Macroplata_tenuiceps,(Avalonnectes_arturi,((Eurycleidus_arcuatus,Rhomaleosaurus_megacephalus),(Archaeonectrus_rostratus,(Meyerasaurus_victor,((Maresaurus_coccai,Borealonectes_russelli),(Rhomaleosaurus_thorntoni,(Rhomaleosaurus_cramptoni,Rhomaleosaurus_zetlandicus))))))))),(((Stratesaurus_taylori,Eopleiosaurus_antiquior),(Plesiosaurus_dolichodeirus,((Eretmosaurus_rugosus,(Westphaliasaurus_simonsensii,(Seelyosaurus_guilelmiimperatoris,(Microcleidus_tournemirensis,(Microcleidus_brachypterygius,Microcleidus_homalospondylus))))),(Plesiopterys_wildi,((((Cryptoclidus_eurymerus,(Kimmerosaurus_langhami,Tatenectes_laramiensis)),(Tricleidus_seeleyi,(Muraenosaurus_leedsii,Picrocleidus_beloclis))),((Pantosaurus_striatus,Plesiosaurus_mansellii),(Djupedallia_engeri,(Spitrasaurus_spp,(Colymbosaurus_trochanterius,Abyssosaurus_nataliae))))),((((Nichollssaura_borealis,((Umoonasaurus_demoscyllus,MIWG_1997_302),(Leptocleidus_capensis,Leptocleidus_superstes))),(Edgarosaurus_muddi,(Plesiopleurodon_wellesi,(Cimoliasaurus_valdensis,QM_F18041)))),(Brancasaurus_brancai,Gronausaurus_wegneri)),(GWWU_A3_B2,(Speeton_Clay_plesiosaurian,((Wapuskanectes_betsynichollsae,(Callawayasaurus_colombiensis,Eromangasaurus_australis)),((Futabasaurus_suzukii,(Kaiwhekea_katiki,Aristonectes_parvidens)),(Libonectes_morgani,Hydrotherosaurus_alexandrae))))))))))),(Thalassiodracon_hawkinsii,((Hauffiosaurus_zanoni,(Hauffiosaurus_longirostris,Hauffiosaurus_tomistomimus)),(Attenborosaurus_conybeari,(Marmornectes_candrewi,(Peloneustes_philarchus,(Pliosaurus_andrewsi,(Simolestes_vorax,(Liopleurodon_ferox,((Liopleurodon_rossicus,((Pliosaurus_funkei,Pliosaurus_BRSMG_Cc332),(Gallardosaurus_iturraldei,(Pliosaurus_brachydeirus,Pliosaurus_irgisensis)))),(Kronosaurus_MCZ_1285,(Brachauchenius_eulerti,(Brachauchenius_lucasi,(Brachauchenius_MNA_V9433,QM_F51291))))))))))))))))))));