SphenodontidaDibamidaeGekkoninaePygopodinaeXantusiidaeCordylidaeScincidaeTeiidaeLacertidaeRhineuridaeBipedidaeAmphisbaenidaeTrogonophidaeHelodermatidaeAnguidaeVaranidaeSerpentesLeiocephalusIguaninaePolyglyphanodonMacrocephalosaurusSineoamphisbaenaAigialosauridaeMosasauridaeDolichosauridaeAdriosaurusPachyrhachisHaasiophisOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Lee_2009a