PistosaurusThalassiodraconPlesiosaurusCryptoclidusKimmerosaurusSMNS16812SeeleyosaurusMuraenosaurusOccitanosaurusHydrorionMicrocleidusBrancasaurusLibonectesLusonectesOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Smith_etal_2012a