OUTGROUPAcanthostegaArcheriaAriekanerpetonBalanerpetonBaphetesCrassigyrinusDendrerpetonDiadectesDiscosauriscus_austriacusDiscosauriscus_pulcherrimusEcolsoniaEocaptorhinusEoherpetonEryopsGephyrostegusGreererpetonIchthyostegaLethiscusLimnoscelisMakowskiaMegalocephalusMicrobrachisPetrolacosaurusPholiderpetonProterogyrinusSauropleuraSaxonerpetonSeymouria_baylorensisSeymouria_sanjuanensisTseajaiaUtegeniaWhatcheeriaOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Klembara_et_Ruta_2005a