(Panderichthys,((Elginerpeton,Obruchevichthys),((Ichthyostega,Ventastega),(Metaxygnathus,(Acanthostega,(Whatcheeria,(Tulerpeton,(Crassigyrinus,(Greererpeton,(Megalocephalus,((((Gephyrostegus,(Pholiderpeton,Proterogyrinus)),(Eoherpeton,Caerorhachis)),(Cochleosaurus,(Phonerpeton,(Balanerpeton,Platyrhinops)))),(Microbrachis,(Discosauriscus,(Diploceraspis,(Sauropleura,(Eocaptorhinus,Ophiacodon))))))))))))))));