(Eusthenopteron,(Acanthostega,(Ichthyostega,(Crassigyrinus,((((Caerorhachis,((Ptyonius,(Adelogyrinus,Greererpeton)),(Balanerpeton,Dendrerpeton))),((Eoherpeton,(Anthracosaurus,(Proterogyrinus,(Archeria,Pholiderpeton)))),(Silvanerpeton,(Chroniosaurus,(Gephyrostegus,(Bruktererpeton,((Seymouria,(Utegenia,(Ariekanerpeton,Discosauriscus))),(Paleothyris,(Casineria,Westlothiana,(Microbrachis,Saxonerpeton)))))))))),(Eucritta,(Loxomma,(Baphetes,Megalocephalus)))),(Pederpes,Whatcheeria))))));