Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981) Subkingdom Pteridobiotina Britton & A. Br. (1896) Superdivision Cycadophytanae Doweld (2001) see Superphylum Cycadophytanae Doweld (2001) Division Gnetophyta Bessey (1907) [monotypic] Class Gnetopsida Eichler ex Kirpot. (1884) Order Welwitschiales Skottsb. ex Reveal (1993) [monotypic] Family Welwitschiaceae Caruel (1879), nom. cons. Genus †Welwitschiella Dilcher, Bernardes-de-Oliveira, D.Pons & T.A.Lott (2005), nom. illeg. see Genus Priscowelwitschia Dilcher, Bernardes-de-Oliveira, D.Pons & T.A.Lott (2005)