(Neusticosaurus_pusillus,(Nothosaurus_marchicus,(Yunguisaurus_liae,Pistosaurus_longaevus,Augustasaurus_hagdorni,(Bobosaurus_forojuliensis,(Anningasaura_lymense,(Macroplata_tenuiceps,Stratesaurus_taylori,((Thalassiodracon_hawkinsii,((Rhaeticosaurus_mertensi,Peloneustes_philarchus),(Hauffiosaurus_longirostris,Hauffiosaurus_tomistomimus,Hauffiosaurus_zanoni))),(Attenborosaurus_conybeari,(Eoplesiosaurus_antiquior,(Plesiosaurus_dolichodeirus,(Eretmosaurus_rugosus,(Westphaliasaurus_simonsensii,((Seelyosaurus_guilelmiimperatoris,(Microcleidus_tournemirensis,(Microcleidus_brachypterygius,Microcleidus_homalospondylus))),(Plesiopterys_wildi,Cryptoclidus_eurymerus)))))))),(Avalonnectes_arturi,((Eurycleidus_arcuatus,Rhomaleosaurus_megacephalus),(Archaeonectrus_rostratus,(Meyerasaurus_victor,Maresaurus_coccai,(Rhomaleosaurus_thorntoni,(Rhomaleosaurus_cramptoni,Rhomaleosaurus_zetlandicus))))))))))));