OUTGROUPAcanthostega_gunnariArcheria_crassidiscaAriekanerpeton_sigaloviBalanerpeton_woodiBaphetes_kirkbyiCrassigyrinus_scoticusDendrerpeton_acadianumDiadectes_absitusDiscosauriscus_austriacusD_pulcherrimusEcolsonia_cutlerensisEocaptorhinus_laticepsEoherpeton_watsoniEryops_megacephalusGephyrostegus_bohemicusGreererpeton_burkemoraniIchthyostega_stensioeiKarpinskiosaurus_secundusLethiscus_stockiLimnoscelis_paludisMakowskia_laticephalaMegalocephalus_pachycephalusMicrobrachis_pelikaniPetrolacosaurus_kansensisPholiderpeton_scutigerumProterogyrinus_scheeleiSauropleura_pectinata_slash_scalarisSaxonerpeton_geinitziSeymouria_baylorensisS_sanjuanensisSpinarerpeton_brevicephalumTseajaia_campiUtegenia_shpinariWhatcheeria_deltaeOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Klembara_2011a