CymatosaurusArchaeonectrusAttenborosaurusAugustasaurusBMNH_49202BrachaucheniusDolichorhynchopsEurycleidusNMING_F10194NIMING_F8749WARMS_G10875HauffiosaurusHydrorionKronosaurusLeptocleidus_capensisLeptocleidus_clemaiLeptocleidus_superstesLiopleurodonMacroplataMaresaurusOUMJ28585Plesiosaurus_longirostrisPlesiosaurus_dolichodeirusPeloneustesPistosaurusPliosaurusRhomaleosaurus_cramptoniRhomaleosaurus_megacephalusLEICS_G221_1851Rhomaleosaurus_propinquusRhomaleosaurus_thorntoniRhomaleosaurus_victorRhomaleosaurus_zetlandicusSeeleysaurusSimolestesSthenarosaurusThalassiodraconTMP_94_122_01UmoonasaurusYunguisaurusLindwurmia_thiudaOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Vincent_et_Storrs_2019ab