(Outgroup_to_Seed_Plants,(Devonian_seed_fern,(Medullosaceae,(Callistophyton,Cordaitales,Coniferales,Ginkgoales,Corystospermaceae,Peltaspermum,Cycadales,Glossopteridales,Caytoniaceae,(angiosperms,(Pentoxylon,(Bennettitales,(Ephedra,(Welwitschia,Gnetum)))))))));