VaranoideaTyphlopidaeLeptotyphlopidaeAnomalepididaeAniliusCylindrophisUropeltidaeXenopeltisLoxocemusPythoninaeBoinaeCalabariaErycinae_S_STropidophiinaeUngaliophiinaeBolyeriinaeAcrochordidaeColubroidea_CrotAnomochilusPachyrhachisHaasiophisMadtsoiidaeDinilysiaOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Lee_et_Scanlon_2002a