(Eusthenopteron,(Panderichthys,(Tiktaalik,(Elginerpeton,(Densignathus,(Metaxygnathus,(Acanthostega,(Ymeria,(Ichthyostega,(Ventastega,(Ossirarus,(Perittodus,((Sigournea,(Diploradus,(Occidens,((Koilops,((((Caerorhachis,((Silvanerpeton,(Gephyrostegus,((Westlothiana,(Paleothyris,(Asaphestera,(Hyloplesion,Microbrachis)))),(Casineria,(Discosauriscus,Seymouria))))),(Eoherpeton,(Pholiderpeton,Proterogyrinus)))),(Eucritta,(Balanerpeton,(Dendrerpeton,(Edops,Eryops))))),((StLouisTetrapod,(Colosteus,(Greererpeton,Tulerpeton))),(((Oestocephalus,(Doragnathus,Lethiscus)),(Sauropleura,(Ptyonius,Urocordylus))),((Aytonerpeton,Acherontiscus),(Adelogyrinus,(Adelospondylus,Dolichopareias)))))),(Megalocephalus,(Baphetes,Loxomma)))),(Crassigyrinus,Ossinodus))))),(Pederpes,Whatcheeria))))))))))))));