(Panderichthys,((Ventastega,(Elginerpeton,Obruchevichthys)),(Ichthyostega,(Whatcheeria,(Metaxygnathus,(Acanthostega,(Tulerpeton,(Crassigyrinus,(Greerepeton,(Megalocephalus,((Balanerpeton,Platyrhinops,(Phonerpeton,(Cochleosaurus,((Phopliderpeton,Proteogyrinus),(Eoherpeton,Gephyrpstegus))))),(Microbrachis,(Discosauriscus,(Eocaptorhinus,Diploceraspis,Sauropleura,Ophiacodon))))))))))))));