(Cymbospondylus_petrinus,(Ichthyosaurus,(Stenopterygius,(Ophthalmosaurus_natans,((Mollesaurus_periallus,(Athabascasaurus_bitumineus,(Brachypterygius_extremus,(Arthropterygius_chrisorum,Caypullisaurus_bonapartei,Platypterygius_hercynicus,Platypterygius_platydactylus,Platypterygius_australis,(Maiaspondylus_lindoei,Platypterygius_americanus))))),(Aegirosaurus_leptospondylus,Ophthalmosaurus_icenicus))))));