(Temnodontosaurus_spp,(Ichthyosaurus_communis,(Hauffiopteryx_typicus,(Stenopterygius_quadriscissus,(Chacaicosaurus_cayi,Stenopterygius_aaleniensis,(((Acamptonectes_densus,(Ophthalmosaurus_icenicus,(Ophthalmosaurus_natans,Mollesaurus_periallus))),((Sveltonectes_insolitus,(Aegirosaurus_leptospondylus,(((Leninia_stellans,Plutoniosaurus_bedengensis,Maiaspondylus_lindoei,Platypterygius_platydactylus,Athabascasaurus_bitumineus,(Platypterygius_australis,Platypterygius_americanus),(Platypterygius_hercynicus,Sisteronia_seeleyi)),(Undorosaurus_gorodischensis,Undorosaurus_nessovi)),(Grendelius_alekseevi,Grendelius_mordax,Caypullisaurus_bonapartei)))),(Janusaurus_lundi,Arthropterygius_volgensis,(Palvennia_hoybergeti,(Arthropterygius_chrisorum,Arthropterygius_chrisorum_PMO))))),(Nannopterygius_enthekiodon,Parophthalmosaurus_saveljeviensis,Gengasaurus_nicosiai)))))));