†phylum Cycadeoideophyta Taylor 1981
Parent taxon: Cycadophytanae according to A. B. Doweld 2001
Sister taxa: Aneurophytophyta, Gnetophyta, Magnoliophyta, Moresnetiophyta, Noeggerathiophyta, Peltaspermophyta
Subtaxa: Cycadeoideopsida
Parent taxon: Cycadophytanae according to A. B. Doweld 2001
Sister taxa: Aneurophytophyta, Gnetophyta, Magnoliophyta, Moresnetiophyta, Noeggerathiophyta, Peltaspermophyta
Subtaxa: Cycadeoideopsida