OutgroupAigialosaurus_dalmaticusOpetiosaurus_bucchichiClidastes_liodontus1Clidastes_liodontus2Clidastes_moorevilleClidastes_novum_spClidastes_propythonEctenosaurus_clidastoidesEctenenosaurus_sp3Globidens_alabamaensisGlobidens_dakotensisHalisaurus_novum_spHalisaurus_platyspondylusHalisaurus_sternbergiMosasaurus_indeterminateMosasarus_maximusMosasarus_missouriensisPlatecarpus_planifronsPlatecarpus_somenensisPlatecarpus_tympaniticus4Platecarpus_tympaniticus5Plesiotylosaurus_crassidensPlioplatecarpus_sp6Plioplatecarpus_sp7Plotosaurus_bennisoniPlotosaurus_tuckeriPrognathodon_curriiPrognathodon_overtoniPrognathodon_rapaxPrognathodon_solvayiTylosaurus_nepaeolicusTylosaurus_novum_spTylosaurus_prorigerOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Christiansen_et_Bonde_2002a