OUTGROUP

Acanthostega_gunnari

Ichthyostega_stensioei

Crassigyrinus_scoticus

Whatcheeria_deltae

Eoherpeton_watsoni

Proterogyrinus_scheelei

Pholiderpeton_scutigerum

Archeria_crassidisca

Greererpeton_burkemorani

Megalocephalus_pachycephalus

Baphetes_kirkbyi

Dendrerpeton_acadianum

Balanerpeton_woodi

Eryops_megacephalus

Ecolsonia_cutlerensis

Sauropleura_pectinatascalaris

Lethiscus_stocki

Saxonerpeton_geinitzi

Microbrachis_pelikani

Petrolacosaurus_kansensis

Eocaptorhinus_laticeps

Limnoscelis_paludis

Tseajaia_campi

Diadectes_absitus

Chroniosaurus_dongusensis

Gephyrostegus_bohemicus

Bruktererpeton_fiebigi

Utegenia_shpinari

Ariekanerpeton_sigalovi

Karpinskiosaurus_secundus

Seymouria_sanjuanensis

Seymouria_baylorensis

Discosauriscus_austriacus

Discosauriscus_pulcherrimus

Spinarerpeton_brevicephalum

Makowskia_laticephala