(Petrolacosaurus,(Thadeosaurus,Claudiosaurus,(Hupehsuchus,(Utatsusaurus,Parvinatator,((Grippia,Chaohusaurus),((Cymbospondylus_petrinus,(Cymbospondylus_buchseri,(Besanosaurus,((Shonisaurus_popularis,((Guizhouichthyosaurus,(Callawaya,(Hudsonelpidia,((Suevoleviathan,(Macgowania,(Temnodontosaurus,(Leptonectes,(Excalibosaurus,Eurhinosaurus))))),(Stenopterygius,(Ichthyosaurus,(Brachypterygius,(Ophthalmosaurus,(Caypullisaurus,Platypterygius))))))))),(Shonisaurus_sikanniensis,(Shastasaurus_pacificus_own_obs,Shastasaurus_liangae)))),(Californosaurus,Toretocnemus))))),(Mixosaurus_cornalianus,(Mixosaurus_atavus,Mixosaurus_nordenskioeldii))))))));