Phylum Gnetophyta Bessey 1907
Parent taxon: Cycadophytanae according to A. B. Doweld 2001
Sister taxa: Aneurophytophyta, Cycadeoideophyta, Magnoliophyta, Moresnetiophyta, Noeggerathiophyta, Peltaspermophyta
Subtaxa: Gnetopsida
Parent taxon: Cycadophytanae according to A. B. Doweld 2001
Sister taxa: Aneurophytophyta, Cycadeoideophyta, Magnoliophyta, Moresnetiophyta, Noeggerathiophyta, Peltaspermophyta
Subtaxa: Gnetopsida