(Ichthyostega,(Pederpes,Crassigyrinus,(Eucritta,Greererpeton,Balanerpeton,Cochleosaurus,((Silvanerpeton,(Anthracosaurus,(Proterogyrinus,(Eoherpeton,(Palaeoherpeton,(Pholiderpeton,Archeria)))))),(Gephyrostegus,(Seymouria,(Limnoscelis,(Asaphestera,(Laosuchus,(Bystrowiana,(Chroniosuchus,Jarilinus,(Chroniosaurus,Madygenerpeton))))))))))));